Borate deposits of northern Sonora, Mexico; stratigraphy, tectonics, stable isotopes, and fluid inclusions

Miranda-Gasca, Miguel A.; Gómez-Caballero, J. Arturo; Eastoe, Christopher J.

doi:10.2113/gsecongeo.93.4.510

Cited by 11 publications

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“…Arsenic has been reported in borate deposits in other regions such as Emet (Turkey), Andes (Argentina) and Sonora (Mexico) [9,39,44]. It has been determined that As locally accompanies borate deposits in the form of cahnite (Ca 2 [29,44,46]. Based on the results of Table 2, some of the above assessments were verified.…”

Section: Resultsmentioning

confidence: 90%

“…Minor differences in their values (S29 and S30) could be attributed to the dissolution of K-feldspars and Kclinoptilolite, which are abundant in the tuffaceous rocks of the basin. Arsenic has been reported in borate deposits in other regions such as Emet (Turkey), Andes (Argentina) and Sonora (Mexico) [9,39,44]. It has been determined that As locally accompanies borate deposits in the form of cahnite (Ca 2 [29,44,46].…”

Section: Resultsmentioning

confidence: 99%

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The geochemistry of Boron-rich groundwater of the Karlovassi Basin, Samos Island, Greece

2009

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Abstract:The upper Miocene of Karlovassi Basin, Samos Island, Greece, contain continental evaporites such as colemanite, ulexite, celestite, gypsum and thenardite. These evaporites are related with volcanic tuffs, diagenetically altered in a saline-alkaline lake environment. The aim of the present paper is to: a) define the impact of the already known and possible buried borates and other evaporites to the geochemistry of the hydrogeological system of Karlovassi Basin, and; b) to assess the correlation between surface and underground evaporite deposits considering the spatial changes in the concentrations of the examined physicochemical parameters. Fieldwork, laboratory measurements and literature data revealed elevated boron values (2136-33012 μg/L) in the central part of Karlovassi Basin. In the same area, high amounts of strontium, sodium, lithium and sulfates also occur. It is proposed that these ions originate from the leaching of evaporites and authigenic minerals such as the Sr-rich clinoptilolite and the boron-bearing potassium feldspar. Boron values are abnormally high for freshwater aquifers, and are indicative of the presence of buried evaporites in the basin with unknown significance.

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Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 99%

The geochemistry of Boron-rich groundwater of the Karlovassi Basin, Samos Island, Greece

2009

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“…In the second column, localities marked with * correspond to deposits where also Au was found but not necessarily mined a "One of the largest and highest grade stratabound Carlin-type gold deposits in China" (Tan et al 2015) b "The largest realgar deposit in Asia (…) mined for more than 1500 years" (Zhu et al 2015); "worked since at least the sixth century AD primarily for medicinal arsenic compounds (important in Chinese medicine)." (Wilson 2007) c "A realgar specimen has a δ 34 S value of − 32.9, consistent with formation of sulfide by bacterial reduction of sulfate" (Miranda-Gasca et al 1998) d Thallium mineral are marked in bold e "One of the world's leading producers of realgar crystals" (Stolburg and Dunning 1985) This awareness is reflected in a recent increase in studies concerning the alteration of As-bearing phases in works of art. The fact that some arsenic sulfides are altered by simple exposure to light makes artworks particularly sensitive when displayed, especially considering that other factors such as temperature, humidity and pollutants can contribute to the damage/alteration process.…”

Section: Alteration and Degradationmentioning

confidence: 99%

Pigments—Arsenic-based yellows and reds

Gliozzo

Burgio

2021

Archaeol Anthropol Sci

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This review offers an update on arsenic-bearing minerals and pigments with the aim of serving as a guide for the study of Cultural Heritage materials in which these materials can be found.The different As-bearing mineral phases (realgar, pararealgar, orpiment, anorpiment, alacranite, dimorphite, bonazziite, uzonite, wakabayashilite, duranusite, arsenolite and claudetite) and some of their light-induced products are examined. The occurrence of As-sulfides and their trade, use, alteration and degradation are also reviewed. Finally, the analytical techniques commonly used for the identification of arsenic-containing pigments are discussed. The manuscript concludes with a good-practice guide and a summary of key concepts for use by those working in the field of cultural heritage.

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“…The orange line is a moving average (period = 50) of magmatic dates compiled from EarthChem. The start and end of rapid cooling for metamorphic core complexes is reported inFoster and Spencer (1992),John and Foster (1993),Fitzgerald et al (1993),Miranda-Gasca et al (1998),Pease et al (1999),Granillo and Calmus (2003),Haines and van der Pluijm (2008),Carter et al (2004),Wong and Gans (2008),Wong et al (2010),Singleton et al (2014Singleton et al ( , 2019,Prior et al (2016), LaForge et al (2017,Jacobson et al (2019),Gottardi et al (2020), andJepson et al (2022). (b) Schematic plate reconstructions showing the subduction of the Pacific-Farallon spreading ridge, the initiation of the MTJ and RTJ, the development of the dextral-transform Pacific-North American plate boundary, and the San Andreas Fault system (SAFS).…”

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confidence: 91%

Oligocene‐Miocene Exhumation of the Pinaleño Metamorphic Core Complex, Southeastern Arizona: Support for Magmatism and Plate Margin Reorganization as Controls on Regional Exhumation Trends

Chapman,

Scoggin,

Jepson

et al. 2024

Tectonics

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The Pinaleño Mountains of southeastern Arizona is the eastern‐most metamorphic core complex in the southern U.S. and northern Mexican Cordillera. This study investigates the thermal history and exhumation record of the Pinaleño core complex using mica 40Ar/39Ar, apatite and zircon (U‐Th)/He, and apatite fission‐track thermochronometers. The Pinaleño Mountains experienced two periods of rapid cooling during the Cenozoic. The first period, from ca. 27 to 21 Ma, records tectonic exhumation related to the development of the core complex and extensional shear zone. This period was followed by a relatively quiescent interval from 21 to 13.5 Ma that records little to no exhumation. The second period of rapid cooling, from 13.5 to 11 Ma, records tectonic exhumation related to high‐angle normal faulting, characteristic of the Basin and Range province. The exhumation timing of the Pinaleño core complex matches previously recognized spatiotemporal trends in the southern Basin and Range province and indicates that core complex exhumation in this region started in southeastern Arizona (ca. 32–33°N) and migrated both northward and southward. These trends correlate well with the latitude and timing of subduction of the Pacific‐Farallon spreading ridge and the migration of the Mendocino (northward) and Rivera (southward) triple junctions. Spatiotemporal core complex exhumation trends also correlate well with regional magmatism associated with the mid‐Cenozoic flare‐up, including syn‐extensional intrusive rocks found in the footwalls of core complexes.

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Borate deposits of northern Sonora, Mexico; stratigraphy, tectonics, stable isotopes, and fluid inclusions

Cited by 11 publications

References 0 publications

The geochemistry of Boron-rich groundwater of the Karlovassi Basin, Samos Island, Greece

The geochemistry of Boron-rich groundwater of the Karlovassi Basin, Samos Island, Greece

Pigments—Arsenic-based yellows and reds

Oligocene‐Miocene Exhumation of the Pinaleño Metamorphic Core Complex, Southeastern Arizona: Support for Magmatism and Plate Margin Reorganization as Controls on Regional Exhumation Trends

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