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Heat, noble gases and CO2 sources in geothermal fields of Mexico

文献类型：期刊论文

作者Han, Guolei1; Pinti, Daniele L.2,3,4; Castro, M. Clara1; Hernandez-Hernandez, Mario Alberto5; Lopez-Hernandez, Aida6; Hall, Chris M.1; Zheng, Guodong4,7; Ramirez-Montes, Miguel8
刊名APPLIED GEOCHEMISTRY
出版日期2022-09-01
卷号144页码:26
关键词Heat Helium Magma degassing Geothermal systems Mexico CO2
ISSN号0883-2927
DOI10.1016/j.apgeochem.2022.105391
英文摘要The Trans-Mexican Volcanic Belt (TMVB) and the Gulf Extensional Province (Baja California) are the regions in Mexico with the highest heat flow and where the main geothermal energy resources are currently exploited. Here, previously published and newly collected heat and volatile species (He, Ar and CO2) data from 132 fluid samples of four geothermal areas belonging to TMVB (Los Azufres, Los Humeros, Acoculco and Cerritos Colorados) and two in Baja California (Cerro Prieto and Las Tres Virgenes) were analyzed. The goal was to identify heat sources, understand how heat is transported into the geothermal reservoirs and how the multiple fluid sources (meteoric, magmatic and crustal) in the reservoir might impact the heat in each field. Distinct R/Ra ratios (where R is the measured 3He/4He ratio and Ra is the atmospheric ratio) are observed in the TMVB and Baja California geothermal fields, with those in the TMVB displaying significantly higher R/Ra values (7.14-7.27) than those in Baja California (1.21-6.62), indicating a higher contribution of mantle helium from possibly younger, active magmatic heat sources. Lower R/Ra values in Baja California might reflect local tectonic features, where reservoirs are primarily affected by crustal contributions from an old, subducted fossil slab related to the Farallon Plate. The analysis of heat to 3He ratios (or Q/3He) together with information provided by 4He/36Ar ratios suggest that heat and volatiles are transferred into the hydrothermal system by advection. The magma bodies beneath the geothermal areas of interest are sufficiently voluminous to provide aqueous fluids by exsolution to sustain this advective flow. The release of He and Ar from magma, during its degassing, appears to be controlled by their diffusivities, fractionating the pristine mantle 4He/36Ar ratio toward higher values, while advection transfers volatiles more rapidly than heat, fractionating the pristine mantle Q/3He ratios toward lower values. The Q/3He vs. 4He/3He relationship shows that boiling and dilution by meteoric water led to further fractionation of heat and volatiles, particularly in Los Azufres and Los Humeros fields, while Cerro Prieto has Q/3He ratios close to those at mid-ocean ridges or fractionated by circulation of low-heat, 4He-rich fossil waters. Distinct sources of heat and volatiles are also reflected in the CO2 content, the major dry gas component in these geothermal fields. Main sources of CO2 are mantle carbon (1%-51%) and limestone (34%-100%) from local sources and the subducting slab, although expected fractionation of the C isotopic composition and CO2/3He during magma ascent and degassing introduce uncertainties on the precise estimation of each source contributing C to the studied geothermal reservoirs. Yet, contribution of carbon from sediments might be minor (0%-35%), and mainly found in Cerro Prieto and Las Tres Virgenes fields located in Baja California, which are affected by the release of volatiles from the subducted Farallon plate and presence of connate waters in the reservoir of Cerro Prieto.
WOS关键词LAS TRES VIRGENES ; BAJA-CALIFORNIA-SUR ; LOS HUMEROS CALDERA ; CERRO-PRIETO ; HELIUM-ISOTOPES ; WATER CIRCULATION ; GROUNDWATER-FLOW ; VOLATILE FLUXES ; NATURAL TRACERS ; MAGMA CHAMBER
资助项目CeMIEGeo (Centro Mexicano de Innovacion en Energia Geotermica)[207032] ; CeMIEGeo (Centro Mexicano de Innovacion en Energia Geotermica)[20] ; Natural Sciences and Engineering Research Council of Canada (NSERC) Dis- covery Grant[RGPIN-2015-05378] ; Chinese Academy of Sciences[2020VMA0011] ; NSF Instrumentation & Facilities award[EAR -1049822] ; Canadian Foundation for Innovation award[10621]
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000864789400002
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构CeMIEGeo (Centro Mexicano de Innovacion en Energia Geotermica) ; CeMIEGeo (Centro Mexicano de Innovacion en Energia Geotermica) ; Natural Sciences and Engineering Research Council of Canada (NSERC) Dis- covery Grant ; Natural Sciences and Engineering Research Council of Canada (NSERC) Dis- covery Grant ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; NSF Instrumentation & Facilities award ; NSF Instrumentation & Facilities award ; Canadian Foundation for Innovation award ; Canadian Foundation for Innovation award ; CeMIEGeo (Centro Mexicano de Innovacion en Energia Geotermica) ; CeMIEGeo (Centro Mexicano de Innovacion en Energia Geotermica) ; Natural Sciences and Engineering Research Council of Canada (NSERC) Dis- covery Grant ; Natural Sciences and Engineering Research Council of Canada (NSERC) Dis- covery Grant ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; NSF Instrumentation & Facilities award ; NSF Instrumentation & Facilities award ; Canadian Foundation for Innovation award ; Canadian Foundation for Innovation award ; CeMIEGeo (Centro Mexicano de Innovacion en Energia Geotermica) ; CeMIEGeo (Centro Mexicano de Innovacion en Energia Geotermica) ; Natural Sciences and Engineering Research Council of Canada (NSERC) Dis- covery Grant ; Natural Sciences and Engineering Research Council of Canada (NSERC) Dis- covery Grant ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; NSF Instrumentation & Facilities award ; NSF Instrumentation & Facilities award ; Canadian Foundation for Innovation award ; Canadian Foundation for Innovation award ; CeMIEGeo (Centro Mexicano de Innovacion en Energia Geotermica) ; CeMIEGeo (Centro Mexicano de Innovacion en Energia Geotermica) ; Natural Sciences and Engineering Research Council of Canada (NSERC) Dis- covery Grant ; Natural Sciences and Engineering Research Council of Canada (NSERC) Dis- covery Grant ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; NSF Instrumentation & Facilities award ; NSF Instrumentation & Facilities award ; Canadian Foundation for Innovation award ; Canadian Foundation for Innovation award
源URL[http://ir.iggcas.ac.cn/handle/132A11/107818]  
专题地质与地球物理研究所_兰州油气中心
通讯作者Pinti, Daniele L.
作者单位1.Univ Michigan, Dept Geol Sci, 1100 N Univ,CC Little Bldg, Ann Arbor, MI 48109 USA
2.Univ Quebec Montreal, GEOTOP, CP 8888 Succ Ctr Ville, Montreal, PQ, Canada
3.Univ Quebec Montreal, Dept Sci Terre & Atmosphere, CP 8888 Succ Ctr Ville, Montreal, PQ, Canada
4.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Petr Resources, Lanzhou 730000, Gansu, Peoples R China
5.UNAM, Catedras CONACyT Inst Geofis, Circuito Invest Cient S-N, Cdmx 04150, Mexico
6.UMSNH, Fac Ingn Civil, Morelia, Michoacan, Mexico
7.China Univ Geosci, Sch Environm Studies, Wuhan 430074, Peoples R China
8.CFE, Gerencia Proyectos Geotermoelect, Mexico City, DF, Mexico
推荐引用方式
GB/T 7714		 Han, Guolei,Pinti, Daniele L.,Castro, M. Clara,et al. Heat, noble gases and CO2 sources in geothermal fields of Mexico[J]. APPLIED GEOCHEMISTRY,2022,144:26.
APA Han, Guolei.,Pinti, Daniele L..,Castro, M. Clara.,Hernandez-Hernandez, Mario Alberto.,Lopez-Hernandez, Aida.,...&Ramirez-Montes, Miguel.(2022).Heat, noble gases and CO2 sources in geothermal fields of Mexico.APPLIED GEOCHEMISTRY,144,26.
MLA Han, Guolei,et al."Heat, noble gases and CO2 sources in geothermal fields of Mexico".APPLIED GEOCHEMISTRY 144(2022):26.

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来源：地质与地球物理研究所

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