... metamorphogenetic变质成因的 metamorphogenic变质成因的 metamorphose变质 ...
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长期以来，云南易门铜矿区中的狮山和凤山铜矿床被认为是陆源沉积变质成因。
The Shishan and Fengshan deposits, two main ore deposits in the Yimen copper ore district, were long considered to be of terrigenous metamorphosed sedimentary origin.
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