Publication List: Geoenergy Group
Centro de Investigación en Energía, UNAM
Temixco, Mor., Mexico.
1996-2005

Updated: 11 November, 2005

ACADEMIC PERSONNEL

Investigators:
Surendra P. Verma: Since 14 February, 1995. spv@cie.unam.mx
Ignacio Torres Alvarado: Since 1st February, 1997. ita@cie.unam.mx
Edgar Santoyo Gutiérrez: Since 1st August, 1998. esg@cie.unam.mx
Pandarinath Kailasa: Since 30 June, 2003. pk@cie.unam.mx
Not currently on the staff of the Geoenergy Group:
Alan D. Smith: 1st May, 2002 - 31 December, 2003.

Post doctoral fellows:
Hetu C. Sheth: 1st January - 31 December 2000.
John Armstrong Altrim Sam: 6 February 2002 - 5 February, 2004. 
Yali Sun: 12 September, 2003 – 11 August 2004. 

Academic Technicians:
Mirna Guevara García: Since 1st August, 1997. mygg@cie.unam.mx

Ph. D. Students:
Thesis completed -
Álvaro Márquez González  (Geosciences - Geology): September 1995 – April 1999 (External Student: Degree conferred in April 1999 by Universidad Complutense de Madrid, Spain).
Fernando Velasco Tapia  (Geosciences - Geochemistry): September 1997 – October 2001 (Degree conferred on 23 Nov. 2001 by UNAM – Institute of Geology, Mexico City).

Thesis in preparation -
Pedro Sánchez Upton (Energy Engineering – Geothermics): Started September 2001.
Jorge Andaverde Arredondo (Geosciences – Computer Modeling): Started February 2002.
Lorena Díaz González (Energy Engineering – Geothermics): Started September 2005.

Master´s Students:
Thesis completed -
Aida Quinto Estrada (Energy Engineering - Geothermics): June 2002 – October 2004 (Degree conferred on 13 Oct. 2004 by Faculty of Engineering-UNAM, Mexico City).
Lorena Díaz González (Informatics):  November 2003 – August 2005 (Degree conferred on 26 August 2005 by ITZ, Zacatepec).  

Thesis in preparation -
Hypitia Palacios Berruete  (Informatics).
Alondra Galicia Alanis (Energy Engineering - Geothermics).
Fredy Hernández Coronado (Geology).

Bachelor´s Students:
Thesis completed -
Rosalía Ciriaco Villanueva (Informatics):  Completed  June 1997. 
Leonides Javier Orduña Galván  (Informatics): Completed  October 1997.
Oriana Yuridia González Castillo  (Informatics): Completed  March 1998.
José Manuel Vasconcelos Fernández (Mineralogy): Completed  April 1998. 
Juan Francisco Rodríguez García  (Mineralogy): Completed  September 1998.
Edgar Ricardo Rosales Arriaga  (Informatics): Completed  September 1999.
Zulma Teresa Sotelo Rodríguez  (Informatics): Completed  January 2000.
Pedro Luis Maldonado Aranda (Geology): Completed  February 2000.
Roberto Hernández Ramos  (Informatics): Completed  June 2000. 
Rosa Carmen Vargas Ballesteros (Mineralogy): Completed  October 2000. 
Hermila Arteaga Díaz   (Informatics): Completed  November 2000.
Mayra López Alquicira  (Informatics): Completed  December 2000.
Cristina Brito Bahena (Informatics): Completed February 2001.
Hypitia Palacios Berruete  (Informatics): Completed March 2001.
Fredy Hernández Coronado (Geology): Completed August 2004.

Visiting Scientists:
Francisco Anguita Virella (Universidad Complutense, Spain): July - August, 1997;
10 June – 10 July, 2003.
Arturo Martín Barajas (CICESE, Mexico): August-September, 1999.
Karsten Storetvedt (Bergen University, Norway):  3 – 7 July, 2000.
Allan D. Smith (National Cheng Kung University, Taiwan):  11 September – 4 December, 2000.
Philip J. Potts (Open University, United Kingdom):  14 – 28 October, 2000.
Rodolfo Rodríguez Ríos (Universidad Autónoma de San Luis Potosí, Mexico):  7 – 15 January, 2004. 
John Armstrong Altrim Sam (Universidad Autónoma del Estado de Hidalgo, Mexico): June 2004.

Laboratory facilities:

Capillary Electrophoresis Instrument equipped with Ultraviolet/Visible (UV/Vis), Photo Diode Array (PDA), and Laser-Induced Fluorescence (LIF) detectors, Beckman-Coulter - for use in major and trace element analysis of geological samples (water, rock, soil, inorganic or organic pollutants, etc.).

X-Ray Fluorescence Spectrometer equipment with 4 kW Rh X-ray tube (installation and calibration under progress, likely to be accomplished by the end of 2004 if everything goes well), Philips - for use in major and trace element analysis of geological samples (rock, soil, inorganic pollutants, etc.).

PUBLICATIONS

Only published and accepted papers are listed here chronologically and according to the category of the publication medium.

PUBLICATIONS IN SCIENCE CITATION INDEX (SCI) JOURNALS

1996
1996-1.	Jochum, K. P. and Verma, S. P. (1996) Extremely high enrichment of Sb, Tl and other trace elements in altered MORB. Chemical Geology, 130: 289-299.

1997
1997-1.	Birkle, P., Torres-Rodríguez, V., González-Partida, E., y Guevara-García, M. (1997) Sustrato geológico y su papel en el escurrimiento superficial y los acuíferos en el campo geotérmico de Los Azufres, México. Ingeniería Hidráulica en México, 12: 37-48.
 
1997-2.	Nieva, D., Verma, M. P., Santoyo, E., Portugal, E., and Campos, A. (1997) Geochemical exploration of the Chipilapa geothermal field, El Salvador. Geothermics, 26 (5/6): 589-612.

1997-3.	Verma, S. P. (1997) Sixteen statistical tests for outlier detection and rejection in evaluation of International Geochemical Reference Materials: Example of microgabbro PM-S. Geostandards Newsletter: The Journal of Geostandards and Geoanalysis, 21 (1): 59-75.

1997-4.	Verma, S. P. and Rodríguez-González, U. (1997) Temperature field distribution from cooling of a magma chamber in La Primavera caldera, Jalisco, Mexico. Geothermics, 26: 25-42.

1997-5.	Verma, S. P. and Santoyo, E. (1997) Improved equations for Na/K, Na/Li, and SiO2 geothermometers by outlier detection and rejection. Journal of Volcanology and Geothermal Research, 79: 9-23.

1998
1998-1.	García, A., Hernández, I., Espinosa, G., and Santoyo, E. (1998) TEMLOPI: A thermal simulator for estimation of drilling mud and formation temperatures during drilling of geothermal wells. Computers & Geosciences, 24 (5): 465-477.

1998-2.	García, A., Santoyo, E., Espinosa, G., and Hernández, I. (1998) Estimation of Temperatures in Geothermal Wells During Circulation and Shut-in in the Presence of Lost Circulation. Transport in Porous Media, 33 (1-2): 103-127.

1998-3.	Moya, S.L., Aragon, A., Iglesias, E., and Santoyo, E. (1998) Prediction of mass eliverability from a single wellhead measurement and geothermal inflow performance reference curves. Geothermics, 27 (3): 317-329.

1998-4.	Navarro-L., I. Verma, S. P., and García Cacho, L. (1998) Mineralogy and major element modelling of volcanic rocks from Amealco caldera, Querétaro, Mexico. Chemie der Erde, 58: 249-270. 

1998-5.	Velasco, F. and Verma, S. P. (1998) Importance of skewness and kurtosis statistical tests for outlier detection and elimination in evaluation of Geochemical Reference Materials. Mathematical Geology, 30: 109-128.

1998-6.	Verma, S. P., Ciriaco-Villanueva R., and Torres-Alvarado I. S. (1998) SIMOCF: modeling fractional crystallization using a Monte Carlo approach. Computers & Geosciences, 24: 1011-1017. 

1998-7.	Verma, S. P., Orduña-Galván, L. J., and Guevara, M. (1998) SIPVADE: A new computer program with seventeen statistical tests for outlier detection and rejection in evaluation of International Geochemical Reference Materials and its application to Whin Sill dolerite WS-E from England and Soil-5 from Peru. Geostandards Newsletter: The Journal of Geostandards and Geoanalysis, 22: 209-234. 

1999
1999-1.	Márquez, A., Oyarzun, R., Doblas, M., and Verma, S. P. (1999) Alkalic (ocean-island basalt type) and calc-alkalic volcanism in the Mexican volcanic belt: a case of plume-related magmatism and propagating rifting at an active margin? Geology, 27: 51-54.
1999-2.	Márquez, A., Oyarzun, R., Doblas, M., and Verma, S. P. (1999) Reply (to Comment by L. Ferrari and J. Rosas Elguera on) Alkalic (ocean-island basalt type) and calc-alkalic volcanism in the Mexican volcanic belt: a case of plume-related magmatism and propagating rifting at an active margin? Comment and Reply. Geology, 27 (11): 1055-1056.
1999-3.	Márquez, A., Verma, S. P., Anguita, F., Brandle, J. L., and Oyarzun, R. (1999) Tectonics and volcanism of Sierra Chichinautzin: Extension at the front of the Central Trans-Mexican Volcanic Belt. Journal of Volcanology and Geothermal Research, 93: 125-150.
1999-4.	Santoyo-Gutiérrez, S., Siqueiros, J., Heard, C. L., Santoyo, E., and Holland, F. A. (1998) An Experimental Integrated Absorption Heat Pump Effluent Purification System. Part I: Operating on water/lithium bromide solutions, Applied Thermal Engineering, 19 (5): 461-475.
1999-5.	Verma, S. P. (1999) Geochemistry of evolved magmas and their relationship to subduction-unrelated mafic volcanism at the volcanic front of the central Mexican Volcanic Belt. Journal of Volcanology and Geothermal Research, 93: 151-171.
1999-6.	Verma, S. P. (1999) Preface “Rift-Related Volcanism: Geology, Geochemistry and Geophysics”. Special Issue of the journal “Journal of Volcanology and Geothermal Research” 93, 15 November 1999, Elsevier.

2000
2000-01	Chandrasekharam, D., Vaselli, O., Sheth, H. C., and Keshav, S. (2000) Petrogenetic significance of ferro-enstatite orthopyroxene in basaltic dikes from the Tapi rift, Deccan flood basalt province, India. Earth and Planetary Science Letters, 179: 469-476.

2000-02	González-Partida, E., Birkle, P., and Torres-Alvarado, I. S. (2000) Evolution of the hydrothermal system at the Los Azufres, México, based on petrologic, fluid inclusion and isotopic data. Journal of Volcanology and Geothermal Research, 104(1-4): 277-296.

2000-03	Mahoney, J. J., Sheth, H. C., Chandrasekharam, D., and Peng, Z. X. (2000) Geochemistry of flood basalts of the Toranmal section, northern Deccan Traps, India: implications for regional Deccan stratigraphy. Journal of Petrology, 41 (7): 1099-1120.

2000-04	Santoyo, E., García, A., Espinosa, G., Hernández, I., and Santoyo, S. (2000) STATIC_TEMP: A useful computer code for calculating static formation temperatures in geothermal wells. Computers & Geosciences, 26 (2): 201-217.

2000-05	Santoyo, E., Santoyo-Gutiérrez, S., and Verma, S. P. (2000) Trace analysis of major heavy metals in groundwater samples by ion chromatography with post-column reaction and ultraviolet-visible detection. Journal of Chromatography A, 884 (1-2): 229-241.

2000-06	Santoyo-Gutiérrez, S., Siqueiros, J., Heard, C. L., Santoyo, E., and Holland, F.A. (2000) An Experimental Integrated Absorption Heat Pump Effluent Purification System. Part II: operating on water/carrol solutions. Applied Thermal Engineering, 20 (3): 269-284. 

2000-07	Sheth, H. C. (2000) The timing of crustal extension, diking, and eruption of the Deccan flood basalts. International Geology Review, 42 (11): 1007-1016.

2000-08	Sheth, H.C., Torres-Alvarado, I. S., and Verma, S. P. (2000) Beyond subduction and plumes: a unified tectonic-petrogenetic model for the Mexican Volcanic Belt. International Geology Reviews, 42 (12):1116-1132.

2000-09	Torres-Alvarado, I. S., Verma, S. P., and Carrasco-Núñez, G. (2000) Compilation of radiogenic isotope data in Mexico and their petrogenetic implications. Proceedings of the Indian Academy of Sciences (Earth and Planetary Sciences), 109 (1): 67-78. 

2000-10	Velasco, F., Verma, S. P., and Guevara, M. (2000) Comparison of the performance of fourteen statistical tests for detection of outlying values in geochemical reference material databases. Mathematical Geology, 32 (4): 439-464. 

2000-11	Verma, S. P. (2000) Error propagation in equations for geochemical modeling of radiogenic isotopes in two-component mixing. Proceedings of the Indian Academy of Sciences (Earth and Planetary Sciences), 109 (1): 79-88.

2000-12	Verma, S. P. (2000) Geochemical evidence for a lithospheric source for magmas from Los Humeros caldera, Puebla, Mexico. Chemical Geology, 164: 35-60.

2000-13	Verma, S. P., García R., Santoyo E., and Aparicio A. (2000) Improved capillary electrophoresis for measuring rare-earth elements in synthetic geochemical standards. Journal of Chromatography A 884 (1-2): 317-328. 

2001
2001-01	Anguita, F., Verma, S. P., Márquez, A., Vasconcelos-F., M, López-Ruiz, I., and Laurrieta, A. (2001) Circular features in the Trans-Mexican Volcanic Belt. Journal of Volcanology and Geothermal Research, 107 (): 265-274.

2001-02	Barragán Reyes, R.M., Torres-Alvarado, I. S., Ascencio, F., Arellano, V., Portugal Marín, E., and Martínez, A. (2001) Equilibrio químico y grado de saturación de minerales en aguas de pozos petroleros del Activo Luna, Tabasco, México. Ingeniería Hidráulica en México, 16 (3): 113-125.

2001-03	Birkle, P., Merkel, B., Portugal, E., and Torres-Alvarado, I. S. (2001) The origin of reservoir fluids at the geothermal field of Los Azufres, Mexico - Isotopical and hydrological indications. Applied Geochemistry, 16 (14): 1595-1610.

2001-04	Espinosa, G., García, A., Santoyo, E., and Hernández, I. (2001) TEMLOPI/V2.0: a computer program for estimation of temperatures in geothermal wells during circulation and shut-in. Computers & Geosciences, 27 (3): 329-346. 

2001-05	Santoyo, E., Santoyo-Gutiérrez, S., García, A., Espinosa, G., and Moya, S. L. (2001) Rheological property measurement of drilling fluids used in geothermal wells. Applied Thermal Engineering, 21 (3): 283-302.

2001-06	Santoyo, E., García, A., Morales, J. M., Contreras, E., and Espinosa, G. (2001) Effective thermal conductivity of Mexican geothermal cementing systems in the temperature range from 28 to 200 °C. Applied Thermal Engineering, 21 (17): 1799-1812.

2001-07	Santoyo, E., García, R., Abella, R., Aparicio, A., and Verma, S. P. (2001) Capillary electrophoresis for measuring major/trace anions in thermal water and condensed steam samples from hydrothermal springs and fumaroles. Journal of Chromatography A, 920 (1/2): 325-332.

2001-08	Velasco-Tapia, F., and Verma, S. P. (2001) First partial melting inversion model for a rift-related origin of Sierra de Chichinautzin volcanic field, central Mexican Volcanic Belt. International Geology Review, 43 (9): 788-817.

2001-09	Velasco-Tapia, F., Guevara, M., Verma, S. P. (2001) Evaluation of concentration data in Geochemical reference materials. Chemie der Erde, 61 (2), 69-91.

2001-10	Verma, S. P. (2001) Geochemical evidence for a lithospheric source for magmas from Acoculco caldera, eastern Mexican Volcanic Belt. International Geology Review, 43 (6), 31-51.

2001-11	Verma, S. P. (2001) Geochemical and Sr-Nd-Pb isotopic evidence for the petrogenesis of volcanic rocks from Huichapan caldera, Hidalgo, Mexico. Lithos, 56: 141-164.

2001-12	Verma, S. P. (2001) Geochemical evidence for a rift-related origin of bimodal volcanism at Meseta Río San Juan, North-Central Mexican Volcanic Belt. International Geology Review, 43 (6): 475-493.

2002
2002-01	Espinosa, G., García, A., Santoyo, E., Contreras, E., and Morales, J. M. (2002) Thermal property measurement of Mexican geothermal cementing systems using an experimental  technique based on the Jaeger method. Applied Thermal Engineering, 22 (3): 279-294.

2002-02	Santoyo, E., Verma, S. P., Sandoval, F., Aparicio, A., and García, R. (2002) Suppressed ion chromatography for monitoring chemical impurities in steam for geothermal power plants. Journal of Chromatography A, 949 (1-2): 281-289.

2002-03	Santoyo, E., García, R., Martínez-Frías, J., López-Vera, F., and Verma, S. P. (2002) Capillary electrophoresis analysis of inorganic anions in atmospheric hailstone samples. Journal of Chromatography A, 956 (1-2): 279-286.

2002-04	Sheth, H. C., Torres-Alvarado, I. S., and Verma, S. P. (2002) What is the ‘calc-alkaline’ rock series?. International Geology Review, 44 (8): 686-701.

2002-05	Smith A. D. and Thorkelson, D. (2002) Geochemical and Nd-Sr-Pb isotopic evidence on the origin and geodynamic evolution of mid-Cretaceous continental arc volcanic rocks of the Spences Bridge Group, south-central British Columbia. Geological Journal, 37: 167-186.

2002-06	Torres-Alvarado, I. S. (2002) Chemical equilibrium in hydrothermal systems: The case of the Los Azufres geothermal field, Mexico. International Geology Review, 44 (7): 639-652. 

2002-07	Torres-Alvarado, I. S., Verma, S. P., and Velasco-Tapia, F. (2002) Comment to “Generation of oceanic-island basalt type volcanism in the western Trans-Mexican volcanic belt by slab rollback, asthenosphere infiltration, and variable flux-melting” by L. Ferrari, C.M. Petrone, L. Francalanci. Geology, 30 (9): 857-858.

2002-08	Verma, S. P.  (2002) Absence of Cocos plate subduction-related basic volcanism in southern Mexico: a unique case on Earth? Geology, 30 (12): 1095-1098.

2002-09	Verma, S. P., Torres-Alvarado, I. S., and Sotelo-Rodríguez, Z. T. (2002) SINCLAS: Standard igneous norm and volcanic rock classification system. Computers & Geosciences, 28 (5): 711-715.

2002-10	Verma, S. P., Santoyo, E., and Velasco-Tapia, F. (2002) Statistical evaluation of analytical methods for the determination of rare-earth elements in geological materials and implications for detection limits. International Geology Review, 44 (4): 287-335.

2003
2003-01	Armstrong-Altrin, J. S., Verma, S. P., J. Madhavaraju, Y. I. Lee, and S. Ramasamy (2003) Geochemistry of upper Miocene Kudankulam limestones, Southern India. International Geology Review, 45 (1): 16-26.

2003-02	González-Partida E., G. Levresse, and E. Santoyo (2003) Paleo-fluid and actual-fluid in the Los Azufres Geothermal Field, Central México. Journal of Geochemical Exploration, 
78-79C: 67-70.
2003-03	M. C. Núñez-Santiago*, E. Santoyo, L.A. Bello-Pérez and S. Santoyo-Gutiérrez (2003) Rheological evaluation of non-Newtonian Mexican nixtamalised maize and dry processed masa flours. Journal of Food Engineering 60 (1): 55-66. 
[*The first author was a M. Sc. Student taking a postgraduate course delivered by E. Santoyo who contributed with the “know-how” of “data quality and handling”].

2003-04	Santoyo, E. and Verma, S. P.  (2003) Determination of lanthanides in synthetic standards by RP-HPLC with the aid of a weighted linear regression model: estimation of method sensitivities and detection limits. Journal of Chromatography A, 997: 171-182.
2003-05	Santoyo E., A. García, G. Espinosa, S. Santoyo-Gutiérrez, and E. Gonzalez (2003) Convective heat transfer coefficients of non-Newtonian geothermal drilling fluids. Journal of Geochemical Exploration, 78-79C: 249-255.
2003-06	Smith, A. D. (2003) Intraplate volcanism: concepts, problems, and proofs. Astronomy and Geophysics, 44: 2.8-2.9.
2003-07	Smith, A. D. (2003) Critical evaluation of Re-Os and Pt-Os isotopic evidence on the origin of intraplate volcanism. Journal of Geodynamics, 36 (4): 469-484.
2003-08	Smith, A. D. (2003) A re-appraisal of stress field and convective roll models for the origin and distribution of Cretaceous to Recent intraplate volcanism in the Pacific basin. International Geology Review, 45 (4): 287-302.
2003-09	Torres-Alvarado, I. S., and Verma, S. P. (2003) Comment to “Neogene volcanism at the front of the central Mexican volcanic belt: basaltic andesites to dacites, with contemporaneous shoshonites and high-TiO2 lava” by Blatter, D.L., Carmichael, I.S.E., Deino, A.L., Renne, P.R. Geological Society of America Bulletin, 115 (8): 1020-1021.
2003-10	Torres-Alvarado, I. S., Verma, S. P., Palacios-Berruete, H., Guevara-García, M., and González-Castillo, O.Y. (2003) DC_BASE: a database system to manage Nernst distribution coefficients and its application for partial melting modeling. Computers and Geosciences, 29  (): 1191-1198.
2003-11	Verma, S. P. (2003) Geochemical and Sr-Nd isotopic evidence for a rift-related origin of magmas in Tizayuca volcanic field, central Mexican Volcanic Belt. Journal of Geological Society of India, 61 (3): 257-276.
2003-12	Verma, S. P., and Carrasco-Núñez, G. (2003) Reappraisal of the geology and geochemistry of the Volcán Zamorano, central Mexico: implications for discriminating the Sierra Madre Occidental and Mexican Volcanic Belt provinces. International Geology Review, 45 (8): 724-752.
2003-13	Verma, S. P., and Santoyo, E. (2003) An unusual systematic behaviour of detection limits for elements from 55Cs to 73Ta. Analytical and Bioanalytical Chemistry, 377 (1): 82-84.

2003-14	Verma, S. P., Torres-Alvarado, I. S., and Velasco-Tapia, F. (2003) A revised CIPW norm. Schweizerische Mineralogische Und Petrographische Mitteilungen, 83 (2): 197-216.

2004
2004-01	Agrawal, S., Guevara, M., and Verma, S. P. (2004) Discriminant analysis applied to establish major element field boundaries for tectonic varieties of basic rocks. International Geology Review 46 (7): 575-594.

2004-02	Armstrong-Altrin, J. S., Lee, Y. I., Verma, S. P., and Ramasamy, S. (2004) Geochemistry of sandstones from the Late Miocene Kudankulam Formation, South India: Implications for provenance, weathering, and tectonic setting. Journal of Sedimentary Research 74 (2): 285-297.

2004-03	Madhavaraju, J., Kolosov, I., Buhlak, D., Armstrong-Altrin, J. S., Ramasamy, S., and Mohan, S. P. (2004) Carbon and oxygen isotopic signatures in Albian-Danian limestones of Cauvery basin, southeastern India. Gondwana Research 7 (2): 527-537.

2004-04	Pandarinath, K., Verma, S. P., and Yadava, M. G. (2004) Dating of sediment layers and sediment accumulation studies along the western continental margin of India – a review. International Geology Review 46 (10): 939-956.

2004-05	Srivastava, R. K., Singh, R. K., and Verma, S. P. (2004) Neoarchaean mafic volcanic rocks from the southern Bastar greenstone belt, Central India: petrological and tectonic significance. Precambrian Research 131 (3-4): 305-322.

2004-06	Sun, Y. (2004) Detailed study on simultaneous separation of rare earth elements by capillary electrophoresis. Journal of Chromatography A 1048: 245-251.

2004-07	Verma, S. P. (2004) Solely extension-related origin of the eastern to west-central Mexican Volcanic Belt (Mexico) from partial melting inversion model. Current Science 86 (5): 713-719.

2004-08	Verma, S. P., and Hasenaka, T. (2004) Sr, Nd, and Pb isotopic and trace element geochemical constraints for a veined-mantle source of magmas in the Michoacán-Guanajuato Volcanic Field, west-central Mexican Volcanic Belt. Geochemical Journal, 38 (1): 43-65.

2005

2005-01	Andaverde, J., Santoyo, E., and Verma, S. P. (2005) Uncertainty estimates of static formation temperatures in boreholes and evaluation of regression models. Geophysical Journal International, 160 (3): 1112-1122.

2005-02	Armstrong-Altrin, J. S. and Verma, S. P. (2005) Critical evaluation of six tectonic setting discrimination diagrams using geochemical data of Neogene sediments from known tectonic settings. Sedimentary Geology, 177 (1-2): 115-129.

2005-03	Campos-Enríquez, J. O., Domínguez-Méndez, F.,  Lozada-Zumaeta, M., Morales-Rodríguez, H. F., Andaverde-Arredondo, J. (2005) Application of the Gauss theorem to the study of silicic calderas: the calders of La Primavera, Los Azufres, and Los Humeros (Mexico). Journal of Volcanology and Geothermal Research, 147: 39-67.

2005-04	Canet, C., Prol-Ledesma, R. M., Torres-Alvarado, I. S., Gilg, H. A., Villanueva, R. E., Lozano-Santa Cruz, R. (2005) Silica-carbonate stromatolites related to coastal Hydrothermal venting in bahía concepción, baja california sur, Mexico. Sedimentary Geology, 174: 97-113. 

2005-05	Guevara, M.,  Verma, S. P., Velasco-Tapia, F., Lozano-Santa Cruz, R., and Girón, P.  (2005) Comparison of linear regression models for quantitative geochemical analysis: Example of X-ray fluorescence spectrometry. Geostandards and Geoanalytical Research (in press – accepted July 2005; programmed for publication in Dec 2005).

2005-06	Pandarinath, K., Torres-Alvarado, I. S., Esther Pushparani, D. and Verma, S. P. (2005) X-ray diffraction analysis of hydrothermal minerals from the Los Azufres geothermal system, Mexico. International Geology Review (in press – accepted February 2005).

2005-07	Santoyo, E., García, R., Aparicio, A., Verma, S. P., and Verma, M. P. (2005) Evaluation of capillary electrophoresis for determining the concentration of dissolved silica in geothermal brines. Journal of Chromatography A, 1071 (1-2): 197-204.

2005-08	Verma, S. P. and Santoyo, E. (2005) Is odd-even effect reflected in detection limits? Accreditation and Quality Assurance, 10 (4): 144-148.

2005-09	Verma, S. P., Torres-Alvarado, I. S., Satir, M., and Dobson, P. (2005) Hydrothermal alteration effects in geochemistry and Sr, Nd, Pb, and O isotopes of magmas from the Los Azufres geothermal field (Mexico): A statistical approach.  Geochemical Journal, 39 (2): 141-163.

2005-10	Martinez-Frías, J., Delgado, A., Reyes, E., Millán, M., Travis, D., Garcia, R., López-Vera, F., Rodríguez-Losada, J.A., Raya, J., and Santoyo, E. (2005) Oxygen and hydrogen isotopic signatures of large atmospheric ice conglomerations. Journal of Atmospheric Chemistry (in press – August 2005).

2005-11	García-Valladares, O., Sánchez-Upton, P.,  and Santoyo, E. (2005) Numerical modelling of flow processes inside geothermal wells: An approach for predicting production characteristics with uncertainties. Energy Conversion and Management (in press – August 2005).

2005-12	Verma, S. P.  (2005) Extension-related origin of magmas from a garnet-bearing source in the Los Tuxtlas volcanic field, Mexico. International Journal of Earth Sciences (Geologische Rundschau) (Submitted: 24 March 2003; received 1 April 2003; comments received; re-submitted en July 2004, reply received February 2005; resubmitted with corrections May 2005; accepted provisionally but still lacking formal decision letter; more corrections done Sept-Nov 2005; finally waiting for formal acceptance expected in Nov 2005).

ARTICLES PUBLISHED AS BOOK CHAPTERS OR CONFERENCE PROCEEDINGS (PEER-REVIEWED)

1998
1998-1	Torres-Alvarado, I. S. (1998) Chemical stability of the hydrothermal silicates at the Los Azufres geothermal field, Mexico. In: G.B. Arehart and J.R. Hulston (eds.), Water-Rock Interaction, Balkema, Rotterdam, pp. 697-700.

2000
2000-1	Verma, S. P. (2000) Geochemistry of the subducting Cocos plate and the origin of subduction-unrelated mafic magmas at the volcanic front of the central part of the Mexican Volcanic Belt. Geological Society of America Special Paper on Cenozoic Tectonics and Volcanism of Mexico, No. 334, Chapter 13, 195-222.
2000-2	Torres-Alvarado, I. S. (2000) Mineral chemistry of hydrothermal silicates in Los Azufres geothermal field, Mexico. In: E. Iglesias, D. Blackwell, T. Hunt, J. Lund and S. Tamanyu (eds.), Proceedings of the World Geothermal Congress, International Geothermal Association, Kyushu-Tohoku, Japan, pp. 1861-1866.
2000-3	Barragán, R.M., Arellano, V.M., Nieva, D., Portugal, E., García, A., Aragón, A., Tovar, R. y Torres-Alvarado, I. S. (2000) Gas geochemistry of the Los Humeros geothermal field, Mexico. In: E. Iglesias, D. Blackwell, T. Hunt, J. Lund and S. Tamanyu (eds.), Proceedings of the World Geothermal Congress, International Geothermal Association, Kyushu-Tohoku, Japan, pp. 2527-2532.

2001
2000-1	Torres-Alvarado, I. S. y Maldonado-Aranda, P.L. (2001) Geochemical modeling of the hydrothermal alteration in Los Humeros geothermal field, Mexico. In: Cidu, R. (ed.), Water-Rock Interaction, Balkema, Rotterdam, pp. 943-946.
2000-2	Kretzschmar, T., Schulze-Makuch, D. y Torres-Alvarado, I. S. (2001) Chemical evolution of groundwater in the Tularosa Basin in Southern New Mexico, USA. In: Cidu, R. (ed.), Water-Rock Interaction, Balkema, Rotterdam, pp. 545-548.

2002
2002-1	Verma, S. P. (2002) Optimisation of the exploration and evaluation of geothermal resources. In: D. Chandrasekharam and J. Bundschuh (Eds.) “Geothermal Energy Resources for Developing Countries”, p. 195-223, Swets & Zeitlinger B. V., A. A. Balkema Publishers, Rotterdam, The Netherlands.

2003
2003-1	Verma, S. P. and Santoyo, E. (2003) Evaluation of mass spectrometry and other techniques for the determination of rare-earth elements in geological materials. Proceedings of the ISMAS Silver Jubilee Symposium on Mass Spectrometry, Goa (India), Vol. 1 (Invited Talks), p. 471-486, Indian Society for Mass Spectrometry, Mumbai, India.

2003-2	Verma, S. P. and Santoyo, E. (2003) In search of a systematic behaviour of detection limits for heavy elements (74W to 92U). Proceedings of the ISMAS Silver Jubilee Symposium on Mass Spectrometry, Goa (India), Vol. 2 (Contributed Papers), p. 511-516, Indian Society for Mass Spectrometry, Mumbai, India.

2005
2005-1	Verma, S. P., Andaverde, J., and Santoyo, E. (2005) Error propagation in estimates of static formation termperatures in boreholes. In: B. Thonon, A. Bontemps, J. M. Corberan, J. Lebrun, H. Mueller-Steinhagen, and B. Palm (editors) Heat transfer in Components and Systems for Sustainable Energy Technologies, Proceedings of the Heat-Set 2005 Conference, 5-7 April 2005, Grenoble, France, p. 435-442.
2005-2	Bienkowski, R., Torres-Alvarado, I. S., Hinderer, M. (2005) Geochemical Modeling of Acid Fluids in Los Humeros Geothermal Field, Mexico. Proceedings of the World Geothermal Congress, International Geothermal Association, Antalya, Turkey, 5 pp.
2005-3	Villanueva-Estrada, R. E., Prol-Ledesma, R. M., Torres-Alvarado, I. S., Canet, C. (2005) Geochemical Modeling of a Shallow Submarine Hydrothermal System at Bahía Concepción, Baja California Sur, México. Proceedings of the World Geothermal Congress, International Geothermal Association, Antalya, Turkey, 5 pp.

OTHER PEER-REVIEWED JOURNALS (not included in SCI)

1996
96-1.	Rodríguez-G. J. F., Verma S. P y Vasconcelos-F. M. (1996) Basaltos normativos en hiperstena: Nuevos diagramas de discriminación para los ambientes de arcos, rifts, e islas oceánicas. Actas INAGEQ, 2: 33-38. 

96-2.	Vasconcelos-F. M, Verma S. P. y Rodríguez-G. J. F. (1996) Basaltos normativos en nefelina: Nuevos diagramas de discriminación para los ambientes de arcos, rifts, e islas oceánicas. Actas INAGEQ, 2: 27-32. 

96-3.	Verma S. P. (1996) Uso y abuso de los diagramas de discriminación. Actas INAGEQ, 2: 17-22. 

96-4.	Verma S. P. (1996) Estado 1996 de Actas INAGEQ y los Congresos Nacionales de Geoquímica. Actas INAGEQ, 2: 155-160

96-5.	Verma S. P. and. Andaverde J (1996) Temperature distribution from cooling of a magma chamber in Los Azufres geothermal field, Michoacán, Mexico. Geofísica Internacional, 35: 105-113. 

96-6.	Verma S. P., Lozano Santa Cruz R., Girón P., y Velasco F. (1996) Calibración preliminar de fluorescencia de rayos-X para análisis cuantitativo de elementos traza en rocas ígneas. Actas INAGEQ, 2: 237-242.

1997
97-1.	Ciriaco-Villanueva R. y Verma S. P. (1997) SIMOCF: Sistema de modelado para cristalización fraccionada.  Actas INAGEQ, 3: 91-102.

97-2.	González-Castillo O. Y. y Verma S. P. (1997) Cálculo de coeficientes de distribución para el modelado petrogenético de procesos magmáticos. Actas INAGEQ, 3: 79-90.

97-3.	Orduña-Galván L. J. y Verma S. P. (1997) SIPVADE: Un nuevo software para detección de valores desviados en MIRG.  Actas INAGEQ, 3: 265-276.

97-4.	Torres-Alvarado, I. S. (1997) “Aplicación del modelado geoquímico en el estudio de la alteración hidrotermal en el campo geotérmico de Los Azufres, Mich.” Actas INAGEQ, 3, 205-214.

97-5.	Verma S. P (1997) Estado actual de los diagramas de clasificación magmática y de discriminación magmática. Actas INAGEQ, 3: 49-78. 

1998
98-1.	López-Alquicira M., Verma S. P., y Guevara M. (1998) Primera optimización de SIPVADE: un sistema para detección de valores desviados. Actas INAGEQ, 4: 73-83. 

98-2.	Torres-Alvarado, I. S. y Satir, M. (1998) “Geochemical studies and element mobility studies in hydrothermally altered rocks from Los Azufres geothermal field, Mexico”, Geofísica Internacional, 37, 201-213. 

98-3.	Vasconcelos-F. M., Verma S. P. y Rodríguez-G. J. F. (1998) Discriminación tectónica: nuevo diagrama Nb - Ba para arcos continentales, arcos insulares, rift e islas oceánicas. Boletín de la Sociedad Española de Mineralogía, 21: 129-146. 

98-4.	Vargas-B. R. C., Verma S. P., y Vasconcelos-F. M. (1998) Discriminación de MORB de la placa de Nazca en dos diagramas Ti/V-Ba/Nb y Ti/V-Zr/Y.  Actas INAGEQ, 4: 183-190. 

98-5.	Verma S. P. (1998) Improved concentration data in two international geochemical reference materials (USGS basalt BIR-1 and GSJ peridotite JP-1) by outlier rejection. Geofísica Internacional, 37: 215-250.

98-6.	Verma S. P. (1998) Error propagation in equations for geochemical modeling of trace elements in two-component mixing. Geofísica Internacional, 37, 327-338. 

1999
99-01.	García, A., Ascencio, F., Espinosa, G., Santoyo, E., Gutierrez, H., and Arellano, V.  (1999) A numerical modeling study of high-temperature deep wells in the Cerro Prieto geothermal field, Mexico. Geofísica Internacional, 38 (4): 251-260. 

2000
00-1.	Sheth, H. C. (2000) No geochronological evidence for flood basalt-hotspot links. New Concepts. Global Tectonics Newsletter, 14: 4-6. 

00-2.	E. Santoyo, R. García, S. P. Verma y A. Aparicio (2000) Cromatografía de líquidos y electroforesis capilar iónica: técnicas analíticas de separación útiles para la caracterización químico-cuantitativa de tierras raras en muestras de origen geológico. Actas INAGEQ, 6 (1): 105-123.

2001
01-1.	Guevara, M., Verma, S.P, and Velasco-Tapia, F. (2001) Evaluation of GSJ intrusive rocks JG1, JG2, JG3, JG1a, and JGb1 by an objective outlier rejection statistical procedure. Revista Mexicana de Ciencias Geológicas, 18 (1): 74-88. 

01-2.	Vasconcelos-F., M., Verma, S. P., and Vargas-B., R. C. (2001) Diagrama Ti-V: una nueva propuesta de discriminación para magmas máficos en cinco ambientes tectónicos. Revista Mexicana de Ciencias Geológicas, 18 (2): 162-174 (also see electronic supplement 18-2-01 on the journal web page web:http//satori.unicit.unam.mx/RMCG.htm). 

01-3.	Velasco-Tapia, F., and Verma, S. P. (2001) Estado actual de la investigación geoquímica en el campo monogenético de la Sierra de Chichinautzin: análisis de información y perspectivas. Revista Mexicana de Ciencias Geológicas, 18 (1): 1-36.

BOOKS

2005
Verma, S. P. (2005) Estadística Básica para el Manejo de Datos Experimentales: Aplicación a la Geoquímica (Geoquimiometría). Universidad Nacional Autónoma de México, México, D.F., 186 pp.