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《World Nonferrous Metals》 2017-12
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An analysis of the reasons for the existence of porphyry deposits in epithermal ore deposits in the Lara mining area, Bolivia

ZHAO Wen-jun;WANG Xin-gang;LI Yang-yang;A long (Hongkong) International Mining Company Limited;  
Bolivia city of La Paz, Lara(Laurani) mining area is located in the central Andean metallogenic belt of South America, in a large area of exposed in acidic shallow or ultra shallow dacite porphyry, porphyry in the widespread development of advanced petrochemical, limonitization quartz alunite, such as hydrothermal alteration, forming a shallow surface position the ore forming shallow epithermal gold silver copper polymetallic ore. By studying the characteristics of mineralization and alteration, it is considered that the ore deposits show obvious porphyry type deposits. From the point of view of the distribution of deposits, overlapping model reveals the spatial relationship between shallow epithermal deposits and porphyry copper deposits, and the unification of the causes, speculated that the porphyry deposits exist Lara, gold and silver copper polymetallic deposit at the bottom or around.
【Key Words】: geological features genesis of the deposits porphyry deposits Bolivia Lara
【CateGory Index】: P618.2
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