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Some Aspects Regarding the Tectonic Setting of High– and Low‐sulfidation Epithermal Gold Deposits of Chile
Author(s) -
KOJIMA Shoji
Publication year - 1999
Publication title -
resource geology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.597
H-Index - 43
eISSN - 1751-3928
pISSN - 1344-1698
DOI - 10.1111/j.1751-3928.1999.tb00044.x
Subject(s) - geology , subduction , tectonics , geochemistry , sulfidation , paleontology , sulfur , chemistry , organic chemistry
In Chile the principal gold deposits of the low‐ and high‐sulfidation types occur in the middle Creataceous‐early Eocene Precordillera and in the middle to late Miocene Andean Cordillera, respectively. In both areas their related magma‐tism migrates south‐east with time. This feature suggests that the metallogenic integrity is greatly affected by a change in the tectonic regime from a transpressive oblique subduction to a weakly‐compressive normal subduction. Moreover, certain differences in the geologic setting, such as the structure of host rocks are recognized between the two types of Chilean epither‐mal gold deposits. This data provide us not only with genetic implications regarding epithermal gold deposits, but also an important guide for gold exploration in the Chilean Cordillera.