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La Caridad Vieja: Vestiges of a removed HS-epithermal system in the La caridad porphyry Cu–Mo system, northeastern sonora, Mexico, based on XRD, SEM, SWIR spectral analysis and U–Pb zircon dating
Journal of South American Earth Sciences ( IF 1.7 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.jsames.2020.102820
Cristo Bejarano-Carrillo , Lucas Ochoa-Landín , Rafael Del Rio-Salas , Martín Valencia-Moreno , Cruz Páez-Beltrán , Joaquín Ruiz , Inocente Espinoza-Maldonado

Abstract The present work contributes with new data to better understand the geology and spatial distribution of the alteration and mineralization events, as well as new U–Pb zircon ages, that allow elucidating the magmatic history of the La Caridad Vieja mineral deposit, which is part of the porphyry Cu–Mo system from La Caridad mine, northwest Mexico. Mineralization is hosted in a sequence of volcanic rocks from the Late Cretaceous-Paleocene Tarahumara Formation and is associated with the emplacement of quartz monzonite stocks, which intruded to volcanic rocks. Detailed studies based on petrography, XRD, SEM and SWIR, indicate that the La Caridad Vieja is characterized by a zone of phyllic alteration dominated by qz-ser in the deepest parts, and it is associated with molybdenite + chalcopyrite + pyrite + galena + sphalerite, with values ranging from 0.1 to 0.9% Cu and

中文翻译:

La Caridad Vieja:基于 XRD、SEM、SWIR 光谱分析和 U-Pb 锆石测年,在墨西哥索诺拉岛东北部的 La caridad 斑岩 Cu-Mo 系统中移除 HS 超热系统的遗迹

摘要 目前的工作有助于更好地了解蚀变和成矿事件的地质和空间分布以及新的 U-Pb 锆石年龄,从而阐明 La Caridad Vieja 矿床的岩浆历史,这是其中一部分墨西哥西北部 La Caridad 矿的斑岩铜钼系统。矿化位于晚白垩世-古新世 Tarahumara 组的一系列火山岩中,并与侵入火山岩的石英二长岩储量的侵位有关。基于岩相学、XRD、SEM和SWIR的详细研究表明,La Caridad Vieja以最深部以qz-ser为主的叶状蚀变带为特征,并伴生辉钼矿+黄铜矿+黄铁矿+方铅矿+闪锌矿,
更新日期:2020-12-01
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