| 长江中下游Fe- Cu- Au- Pb- Zn多金属成矿带主要地质成矿特征及潜力分析 |
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| 引用本文： | 阴江宁,邢树文,肖克炎.长江中下游Fe- Cu- Au- Pb- Zn多金属成矿带主要地质成矿特征及潜力分析[J].地质学报,2016,90(7):1525-1536. |
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| 作者姓名： | 阴江宁 邢树文 肖克炎 |
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| 作者单位： | 中国地质科学院矿产资源研究所/国土资源部成矿作用与资源评价重点实验室，北京，100037;中国地质科学院矿产资源研究所国土资源部成矿作用与资源评价重点实验室，北京， 100037;中国地质科学院矿产资源研究所，北京，100037 |
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| 摘 要： | 长江中下游成矿带是我国重要的铜-金-硫-铁多金属成矿区带,主要矿床类型为矽卡岩型、玢岩型、斑岩型和热液型。区带重要矿产资源时空分布具有不均匀性,一定的矿产及矿产组合产于特定的地质历史时期,以燕山成矿期为主,区内99%以上的铁、铜、金矿资源量以及全部铅、锌、银、钼、铊矿资源量形成于燕山成矿期;且这些矿产的成矿时代多集中于燕山中晚期。长江中下游成矿带地质构造具有多层、块段、立体网络的特点,数条岩石圈断裂将整个区域分割为若干个断块;各个断块的内部结构各有差异,地质构造发展历史不同,构造-沉积-岩浆活动的特点也不尽相同,造成矿化类型、矿产组合、矿产资源储量的分布具不均匀分布的特征。在区内主干断裂带或与之平行的基底断裂与近东西向基底断裂的交切和复合部位,形成了多个岩浆-成矿活动中心;受其影响在长江中下游地区出现了多个矿集区。主导控制因素为构造-岩浆作用,而地层作为成矿与赋矿的场所,亦是主要控制因素之一,特别是特定层位中受岩相古地理环境制约的矿(胚)层,和有利的岩性层位或其组合具有十分重要的作用。根据区带成矿规律、找矿新突破以及在全国矿产资源潜力评价数据和成果基础上,在该区带内划分了五个重点远景区作为国家整装勘查区的后备选区并对其资源潜力进行了分析和评价。
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| 关 键 词： | 长江中下游 成矿区带 成矿特征 成矿规律 成矿预测 |
Metallogenic Characteristics and Resource Potential Analysis of the Middle Lower Yangtze River Fe- Cu- Au- Pb- Zn Metallogenic Belt |
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| YIN Jiangning,XING Shuwen and XIAO Keyan.Metallogenic Characteristics and Resource Potential Analysis of the Middle Lower Yangtze River Fe- Cu- Au- Pb- Zn Metallogenic Belt[J].Acta Geologica Sinica,2016,90(7):1525-1536. |
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| Authors: | YIN Jiangning XING Shuwen and XIAO Keyan |
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| Abstract: | The Middle Lower Yangtze River metallogenic belt is well known for its endowment of Cu- Au- S- Fe polymetallic deposit, and the main deposit types contain skarn, porphyry, hydrothermal types. Spatially and temporally, the important deposits are not distributed evenly in the belt. Spatial and temporal distribution of mineral resources is uneven. Some minerals and associated ores formed at specific periods, with 99 % of Fe, Cu, Audeposits and all Pb, Zn and Tl deposits confined in late Yanshanian. Geological structure of the belt is characterized by multiple layers, block and cubic shapes. Several lithospheric faults divide the whole district into some faulting blocks, each of which exhibits distinct geological features and different evolutionary history and different tectonic magma activity, leading to different metallogenic styles, associated mineral resources and unevenly distributed metals. The intersections of principle faults and paralleled base fault formed several centers of magma mineralization activities, resulting in the formation of several ore clusters along the Yangtze River Valley. The leading controlling factor is tectonic magmatism whereas strata is another ore control factor as a favorable host rocks and locations. Particularly, some layers restricted by lithofacies and paleogeography, and favorable sedimentary facies play more important role in ore formation. Five prospective districts were delineated in the belt as the candidate national exploration areas and their resources potential were analyzed based on regional metallogenic law, new exploration achievement and the national mineral assessment project. |
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| Keywords: | Middle- LowerYangtze River metallogenic belt metallogenic characterization metallogenic law mineralization prediction |
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