THE DISCOVERY OF ADULAR AND ITS GEOLOGICAL SIGNIFICANCE IN GULIKU GOLD(SILVER) DEPOSIT
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摘要: 浅成低温热液金矿床分为冰长石-绢云母型和明矾石-高岭石型两类，主要分布于环太平洋地区、地中海-喜马拉雅带和蒙古-鄂霍次克带，形成了许多超大型和大型金矿床.矿床主要形成于大陆边缘和岛弧环境，与陆相火山岩和火山机构有密切的关系，已发现矿床的形成时间以中、新生代为主.矿化发生于火山作用后，火山体系脆性断裂带和深部侵入体的发育使地下水循环，具有大量成矿流体及成矿物质来源是形成浅成低温热液金矿床的重要条件.Abstract: Epithermal gold deposits can be divided into two types:adular-sericite-and alunite-kaolinite-types.These deposits, found in circum-Pacific area, the Mediterranean-Himalayas and Mogolia-Okhotsk zones, are commonly large and superlarge scale. Most of the gold deposits are in continental margins and island arcs and closely related to continental volcanic rocks and structures. The volcanic rocks hosting the gold deposits are acid or alkali and dominantly high-oxideized I-type or magnetite-series. Some gold deposits' wallrocks are metasedi-mentary basic rocks. Beneath some gold deposits occurintrusive rocks. Most of the gold deposits were formed in Mesozoic or Cenozoic.
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Key words:
- epithermal gold dposits /
- geological characteristics /
- genetic models
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