内蒙古大兴安岭中北段铜铅锌金银多金属矿床成矿规律与找矿方向
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The metallogenetical characteristics and prospecting direction of the copper-lead-zinc polymetal deposits in northern-central Daxinganling belt, Inner Monglia
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    摘要:

    本文根据内蒙古大兴安岭中北段地质构造演化、成矿特征、中俄蒙邻近地区矿产分布和近年来的地质和找矿工作进展,划分了地质构造单元和成矿区带,总结了该地区主要矿床类型和成矿时代分布规律,提出了多金属矿的找矿方向。本文将大兴安岭中北段可以划分为额尔古纳地块、鄂伦春晚华力西褶皱带和东乌旗早华力西褶皱带三个Ⅲ级构造单元,细分为满洲里-新右旗中生代火山-深成岩隆起区等14个Ⅳ级构造单元。工作区主要矿床类型有矽卡岩型、斑岩型、热液型,其次为海相沉积型、岩浆熔离型、砂矿型和云英岩型,其中斑岩型和热液型矿床是主要矿床类型,热液型矿床可以细分为6个子类型。矿床的分布总体上具有北东呈带、北西向成行特点,根据矿床的分布和区域构造特征可以分为德尔布干和东乌旗-兴安两个北东向Ⅲ级成矿带,13个Ⅳ级成矿区。从成矿时代上看,矿床的形成经历了从早古生代至晚中生代的很长时间,而已晚中生代为主。但不同类型矿床的成矿时代分布有很大差异。单一的斑岩型铜(钼金)矿从早古生代延续至燕山期,而其他类型矿床均形成于燕山期。提示在大兴安岭今后的找矿工作中对于矽卡岩型和热液型矿床主要集中于燕山期构造岩浆活动区,而斑岩型矿床找矿则应同时注意古生代和中生代等构造岩浆活动区。

    Abstract:

    Based on the study of the geological evolution, metallogenetical characteristics in central-northern Daxinganling belt, and the distribution characteristics of the ore deposits at the adjacent areas in Mongolia and Russia, the geological units and metallogenetic zones are divided, the main types of the ore deposits and metallogenetical ages are summed up. The direction of ore prospecting in the belt is proposed. Daxinganling metallogenetical belt is divided into three geological units of third-order, i.e. Eerguna block, Elunchun hercynian fold belt and Dongwuqi early-hercynian fold belt, and subdivided into 14 geological units of fourth-order. The types of ore deposits include skarn, porphyry, hydrothermal, VMS, magmatic differentiation, placer and greisen, the hydrothermal ore deposits canbe subdivided into 6 secondary types. The porphyry-type and hydrothermal-tye ore deposits are the most important. The ore deposits mainly distribute in northeastern direction as well as with a north-western array. According to their space distribution and the characters of the main ore-controlling tectonics, Daxinganling metallogenetic belt is divided into two third-order metallogenetic zones: Deerbugan and Dongwuqi-Xinganl and 13 fourth-order metallogenetic enrichment regions. On time scale, the formation of ore deposits in the belt has been last from early Paleozoic to late Mesozoic era, the later era is main age. The mineralization of various types of ore deposit is quite different. The formation of the single type of porphyry deposits may last from early last from early Paleozoic to late Mesozoic, but other types of ore deposits mainly formed during Yanshanian period. It is implying that the ore-prospecting for skarn and hydrothermal ore deposits should focused on the region of Yanshannian magmatic-tectonic activity developed, for the porphyry deposits, both the Paleozoic and the Mesozoic magmatic-tectonic areas should be stressed.

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佘宏全,李红红,李进文,谭刚,张德全,金俊,董英君,丰成友.2009.内蒙古大兴安岭中北段铜铅锌金银多金属矿床成矿规律与找矿方向[J].地质学报,83(10):1456-1472.
shehongquan, Li Honghong, Li Jinwen, Tan Gang, Zhang Dequan, Jin Jun, Dong Yingjun, Feng Chengyou.2009. The metallogenetical characteristics and prospecting direction of the copper-lead-zinc polymetal deposits in northern-central Daxinganling belt, Inner Monglia[J]. Acta Geologica Sinica,83(10):1456-1472.

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  • 收稿日期:2009-09-04
  • 最后修改日期:2009-09-04
  • 录用日期:2009-09-24
  • 在线发布日期: 2009-10-19
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