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Minerals, Volume 13, Issue 5
May 2023 - 126 articles
Cover Story: Agates from Chihuahua state in northern Mexico are some of the most beautiful and most expensive agates in the world. The most famous deposits exist in the Chihuahuan Desert mainly within the geological unit of Rancho el Agate andesite. The mixing of near-surface fluids produced by rock alteration with magmatic hydrothermal solutions caused agate mineralization. This mixing led to the accumulation of various elements and mineral inclusions within the SiO2 matrix of the agates, creating an impressive spectrum of vivid colors. Some hydrothermal fluids are presumably related to the residual solutions of rhyolitic volcanism, which followed latitic extrusions and probably caused the formation of polymetallic ore deposits in the Chihuahua area. View this paper
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Minerals - ISSN 2075-163X