| 中国大型铜矿床类型、成矿环境与成矿集中区的潜力 |
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| 引用本文：.1991.Types, metallogenic environments and potentialities of metallogenic provinces of large copper deposits in China[J].Mineral Deposits,10(2):119~130 |
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| 中文摘要:本文通过对我国31个大型以上及56个中型铜矿床的综合调研并与国外对比得出如下结论：① 中国陆壳是在几个古板块基础上增生起来的，大型铜矿成矿作用在空间上向板块边缘推移，在时间上越来越新。大型铜矿床多出现在地台边缘、增生褶皱带边缘和陆内断裂拗陷带边缘；② 大型铜矿可分六大成矿期，以中生代最重要，次为新生代、中元古代；③ 我国地跨世界三大构造域，板块构造丰富多样，地壳运动频繁而又比较强烈。因此，就形成大型铜矿床的环境而言，内生成分较多的矿床类型比外生成分较多的矿床类型可能更为有利。大型铜矿床可分六大类型，斑岩型最有潜力，CuNi型有希望；④ 中国地台仅占陆壳面积约三分之一，固化较晚，且不稳定，不具备形成国外某些特大型一超大型铜矿的环境；⑤ 划分出16个成矿集中区、远景区，并指出其成矿环境，类型和潜力。 |
| 中文关键词:大型铜矿床 类型 成矿环境 成矿集中区 潜力 中国 |
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| Types, metallogenic environments and potentialities of metallogenic provinces of large copper deposits in China |
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| Abstract:Based upon a comprehensive investigation into 31 large and 56 medium-sized copper deposits in China in comparison with those abroad，this paper reaches the following conclusions: 1．China’s continental crust was formed by the accretion around several massifs throughout the geological ages which led to the migration of the metullization of large copper deposits towards the margins of the old plate with the lapse of time. Therefore, China's large copper deposits mostly occur along margins of platform, accretionary fold belt and faulted downwarping belt within the continental crust. 2．The Chinese continent lies across the world’s three tectonic domains and is characterized by varied plate tectonic styles as well as frequent and rather strong crustal movements．Therefore, so far as the formation of large copper deposits is concerned, the environment seems to be more favorable for the deposits of mainly endogenic origin than deposits dominated by exogenic origin. Of the six major types of large copper deposits in China，the porphyry type seems to have the largest potential, and the copper-nickel type is also promising. 3．There are six major metallogenic epochs for China’s large copper deposits. Mesozoic is the most important epoch, and Cenozoic and Mesoproterozoic are next in importance．4．In China's continental crust, the platform region makes up 29.7％ in mass percentage, and the rest is composed of folded regions, whereas in the global continental crust the platform region makes up 69.6％. The consolidation of China's continental crust took place later than that of the platform and shield areas in other regions of the world，and China's platform is not stable. The metallogenic environments for giant copper belts such as the environments of the Archean-Neoproterozoic Canadian shield and Mesoproterozoic Central Africa are not likely to exist in China. 5．The authors have assigned the large copper deposits in China to 16 metallogenic provinces and prospects and pointed out their mineralization types and potentialities. |
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