Tectonomagmatic origin of Precambrian rocks of Mexico and Argentina inferred from multi-dimensional discriminant-function based discrimination diagrams

Pandarinath, Kailasa

doi:10.1016/j.jsames.2014.10.004

Cited by 8 publications

(6 citation statements)

References 41 publications

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“…However, similar contrary behavior is also observed in spring waters of LAGF and Cerritos Colorados (La Primavera) geothermal fields (CCGF), Mexico. In LAGF, non-equilibrated spring waters have indicated the reservoir temperatures closer to average BHT (Pandarinath 2014) whereas, non-equilibrated and partially equilibrated spring waters of CCGF (Pandarinath and Domínguez-Domínguez 2015) have indicated more reliable reservoir temperatures than those of partially and fully equilibrated waters, respectively. This type of performance of the solute geothermometers by spring waters, in relation to the existing equilibrium conditions, may be due to the prevailing mixing process at the shallower depths.…”

Section: Discussionmentioning

confidence: 95%

“…Contrary to this general observation, Na/K geothermometers were highly successful in predicting the reservoir temperatures from the springs of HCO 3 -type water at LHGF. Pandarinath (2014) has also reported that Na/K geothermometry of HCO 3 -rich water from Los Azufres geothermal field (LAGF) has provided temperatures closer to the BHT, but fully mature geothermal water (Cl-rich) of springs have indicated reservoir temperatures having large differences when compared with average BHTs. Burgos (1999) have reported that this type of behavior by HCO 3 type is typical for water associated with hightemperature systems, probably of volcanic origin, but considerably diluted due to mixing with meteoric water during its rise to the surface.…”

Section: Discussionmentioning

confidence: 99%

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Solute geothermometry of Cerro Prieto and Los Humeros geothermal fields, Mexico: considerations on chemical characteristics of thermal water

et al. 2016

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A comprehensive study on the chemical considerations of thermal waters (springs and geothermal wells) on the performance of solute geothermometers in predicting the reservoir temperatures of Cerro Prieto and los Humeros geothermal fields of Mexico has been carried out. The reservoir temperatures from these thermal waters were calculated by applying all the available 28 solute geothermometers and the obtained temperatures were compared with the bottom hole temperatures (BHT) of the geothermal wells. Thermal waters of springs and geothermal wells of Cerro Prieto geothermal field (CPGF) are Cl type and majority of them are partially equilibrated. In the case of Los Humeros geothermal field (LHGF), spring waters are HCO 3 type and all of them have indicated non-equilibrium conditions. Majority of the predicted reservoir temperatures by Na/K geothermometers from spring waters of CPGF and LHGF are within ±20 % differences compared to average BHTs, whereas estimated temperatures by all other solute geothermometers (non-Na/K) from spring waters of both the geothermal fields have shown wide differences (> ±20 %). In the case of geothermal well waters, majority of the reservoir temperatures estimated by only Na/K geothermometers from well waters of CPGF are within ±20 % differences and in the case of wells of LHGF, majority of the reservoir temperatures estimates by all solute geothermometers are having differences > ±20 %. The present study indicates the following: (1) only 3 geothermometers (out of 28) from spring waters of CPGF have predicted reservoir temperatures similar (statistically no significant differences) to the average of BHTs, although all springs are of Cl type; (2) different chemical characteristics of spring and well waters of CPGF and LHGF may be the result of the wide differences in the lithology of their reservoirs; (3) more number of solute geothermometers from non-equilibrated spring waters of CPGF and LHGF have predicted reliable reservoir temperatures than partially equilibrated waters; (4) In general, Na/K geothermometers have predicted more reliable reservoir temperatures from spring and well waters of both geothermal fields, when compared to other solute geothermometers; (5) the prediction of non-reliable reservoir temperatures by other than Na/K geothermometers may be the result of dilution/ mixing of deep thermal waters with the meteoric surface waters; and (6) more number of geothermometers have predicted reliable reservoir temperatures from well waters in comparison to spring waters of both the studied geothermal fields.

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Section: Discussionmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 99%

Solute geothermometry of Cerro Prieto and Los Humeros geothermal fields, Mexico: considerations on chemical characteristics of thermal water

et al. 2016

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“…For sedimentary rocks as well, multidimensional tectonic discrimination diagrams are beginning to be proposed (Verma and Armstrong-Altrin, 2013) and used (e.g., Absar and Sreenivas, 2015;Armstrong, 2015;Bouyo et al, 2015;Zaid, 2015aZaid, , 2015bZaid and Gahtani, 2015;. The multidimensional diagrams for igneous rocks have been successfully tested and used by numerous researchers (e.g., Sheth, 2008;Pandarinath and Verma, 2013;Oliveira, 2013, 2015;Verma, 2013;Pandarinath, 2014aPandarinath, , 2014bBora and Kumar, 2015;Kaur et al, 2015;Rahman and Mondal, 2015;Srivastava et al, 2015;. The probability calculations are the same as those reported earlier (Verma and Agrawal, 2011;Verma, 2012b;.…”

Section: Tectonomagmatic Discrimination Diagramsmentioning

confidence: 87%

Present state of knowledge and new geochemical constraints on the central part of the Mexican Volcanic Belt and comparison with the Central American Volcanic Arc in terms of near and far trench magmas

Verma¹

2015

Turkish J Earth Sci

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A brief critical review is presented of the geological, geophysical, geochemical, and plate tectonic evidence for the origin and evolution of the central part of the Mexican Volcanic Belt (C-MVB). Databases were constructed for the C-MVB from new and published data as well as for the Central American Volcanic Arc (CAVA), other continental and island arcs, continental rifts or extensional areas, and collision zones. Conventional procedures as well as statistical techniques of multidimensional tectonic discrimination diagrams and significance tests were used to interpret the data. A subdivision of the databases for the C-MVB and CAVA into near the trench or front-arc and far from the trench or backarc magmas helped to demonstrate the lack of slab input for the C-MVB and the presence of a classic arc-trench system for the CAVA. The use of software IgRoCS, DODESSYS, UDASYS, TecD, and TecDIA provided the following conclusions: 1) basic magmas in the C-MVB that originated in the mantle without the involvement of the subducted slab represent a continental rift setting; 2) C-MVB acid and intermediate magmas that originated, respectively, from the crust and mixed mantle-crustal sources do not show a clear influence of the present subducted slab and represent the tectonic setting of the older crustal and mixed mantle-crustal source rocks; and 3) all rocks in the CAVA were derived from the involvement of the subducted slab and represent a classical continental arc system related to the subduction of the Cocos plate beneath the Caribbean plate, whereas CAVA back-arc rocks originated mainly in the mantle, probably with much less involvement of the subducted slab. Reinterpretation of the Sr, Nd, Pb, and Hf isotopic data supports these inferences. I propose a new tectono-petrogenetic model based on the continuation of the extensional tectonics related to the triple rift system in the western part of the MVB.

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“…Dostal and Keppie () studied the geochemistry of the Ordovician psammite‐pelite rocks of the Oaxacan Complex and interpreted a rifted margin (passive) setting. Recently, Pandarinath () evaluated the multidimensional tectonomagmatic discrimination diagrams for basic (Verma and Agrawal, ), intermediate (Verma and Verma, ) and acid (Verma et al ., ) volcanic rocks using geochemistry data of Precambrian (1117–988 Ma) rocks of Oaxacan Complex, southern Mexico, and identified a high probability for rift setting. This reveals that the tectonic settings inferred from the major (Figs.…”

Section: Discussionmentioning

confidence: 99%

Mineralogy and geochemistry of sands along the Manzanillo and El Carrizal beach areas, southern Mexico: implications for palaeoweathering, provenance and tectonic setting

et al. 2016

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The provenance of sands from the Manzanillo (MN) and El Carrizal (CAR) beach areas along the Mexican Pacific coast (southern Mexico) was investigated based on their modal composition, mineralogy and geochemical data. The average quartz, feldspar and lithic fragment (QFL) ratios revealed that the proportion of quartz is higher in CAR sands than in MN sands. In comparison with MN, the CAR sands are enriched in SiO2 content with higher SiO2/Al2O3 ratio indicating that sediment recycling is greatest for the CAR sands. The variation in K2O/Al2O3 and Na2O/K2O ratios between the MN and CAR sands specified a difference in the relative proportion of plagioclase. The chemical index of alteration (CIA) and Plagioclase Index of Alteration (PIA) values revealed a moderate weathering intensity in the source areas. The MN sands are characterized by a low degree of rare earth element (REE) fractionation (LaCN/YbCN = ~6–7), whereas the CAR sands define fractionated REE patterns (LaCN/YbCN = ~8.8–16.8). The fractionated REE pattern with elevated total low REE (∑LREE) content of the CAR sands suggested that sediment sorting is higher for the CAR than MN sands. Small negative and positive Eu anomalies (Eu/Eu* = ~0.91–1.23) of MN sands indicated the derivation of sediments from felsic‐intermediate source rocks. The CAR sands showed higher concentration of ∑LREE than total heavy REE (∑HREE) and characterized by a significant negative Eu anomaly (Eu/Eu* = ~0.46–0.78), suggested that the source rock is felsic type. The result obtained by the comparison of REE patterns of the beach sands to the probable source rocks is also consistent with this observation. The compositional differences identified between the MN and CAR beach areas suggested that longshore current in the mixing and homogenization of sands is not significant. The new tectonic discriminant‐function‐based multidimensional diagrams showed an arc setting (active) for the MN sands and a rift setting (passive) for the CAR sands, which is consistent with the regional geology of southern Mexico. Copyright © 2016 John Wiley & Sons, Ltd.

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Tectonomagmatic origin of Precambrian rocks of Mexico and Argentina inferred from multi-dimensional discriminant-function based discrimination diagrams

Cited by 8 publications

References 41 publications

Solute geothermometry of Cerro Prieto and Los Humeros geothermal fields, Mexico: considerations on chemical characteristics of thermal water

Solute geothermometry of Cerro Prieto and Los Humeros geothermal fields, Mexico: considerations on chemical characteristics of thermal water

Present state of knowledge and new geochemical constraints on the central part of the Mexican Volcanic Belt and comparison with the Central American Volcanic Arc in terms of near and far trench magmas

Mineralogy and geochemistry of sands along the Manzanillo and El Carrizal beach areas, southern Mexico: implications for palaeoweathering, provenance and tectonic setting

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