首页|Characterization of Arroyo Verde Epithermal Deposit:Paragenesis, Mineral Geochemistry, Geochronology and Fluid Inclusions in Lower Chon Aike Volcanism, Argentina

Characterization of Arroyo Verde Epithermal Deposit:Paragenesis, Mineral Geochemistry, Geochronology and Fluid Inclusions in Lower Chon Aike Volcanism, Argentina

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Arroyo Verde epithermal deposit, in the North Patagonia region of Argentina, is located within the Lower Chon Aike volcanism and is developed between 192.6 ± 2.5 Ma (mineralization host rock) and 189.5 ± 2.6 Ma (overlying lava). Marifil volcanic complex is the host rock for these veins, veinlets and breccias. This particular small deposit has developed low to intermediate sulphidation characteristics, with gangue mineral textures associated with several ore minerals. Electron probe microanalysis determines electrum, silver minerals such as acanthite, and tetrahedrite, related Ag-Cu minerals like jalpaite, mckinstryite, stromeyerite, and base metals like chalcopyrite, sphalerite, galena and pyrite. Fluid inclusions in quartz of two out of five events indicate that these Low Jurassic veins were formed due to subtle boiling and dilution mechanisms and by low-salinity (3.4 wt.％ to 6.7 wt.％ NaCl Eq) magmatic-hydrothermal fluid at 225 to 310 ℃.The fluid inclusion measurements that indicate boiling (Event 3) were plotted, and based on this data, we interpret that the Arroyo Verde deposit has been eroded between 550 and 700 m. This particular character has not been previously recorded for other sectors of the eastern north Patagonian region.

epithermal depositAg mineralsmineral geochemistryfluid inclusionsChon Aike geochronology

Cecilia Pavón Pivetta、Leonardo Benedini、Paulo Marcos、Ma. Agustina Cócola、Mercedes Virginia Barros、Daniel Gregori、Leonardo Strazzere、Anderson Costa dos Santos、Mauro C. Geraldes

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Instituto Geológico del Sur (INGEOSUR),Universidad Nacional del Sur (UNS)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET),Bahía Blanca 8000,Argentina

Dpto. de Geología,Universidad Nacional del Sur (UNS),Bahía Blanca 8000,Argentina

Universidad Nacional de Río Negro,Instituto de Investigación en Paleobiología y Geología,General Roca 8332,Argentina

Universidade do Estado do Río de Janeiro,Faculdade de Geologia,Departamento de Mineralogia e Petrologia Ígnea,Río de Janeiro 20559-900,Brazil

Geobiotec,Departamento de Geociências,Universidade de Aveiro,Aveiro 3800-002,Portugal

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2024

10.1007/s12583-023-1823-5

地球科学学刊(英文版)
中国地质大学

地球科学学刊(英文版)

CSTPCD
影响因子：0.724
ISSN：1674-487X
年,卷(期)：2024.35(1)
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