Metallogeny of copper and iron deposits in the Eastern Yangtse Craton, east-central China
Metallogeny of copper and iron deposits in the Eastern Yangtse Craton, east-central China
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DOI：
10.1016/0169-1368(96)00003-0
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发表时间：
1996-10
影响因子：
3.3
通讯作者：
Y. Zhai;Y. Xiong;Shuzhen Yao;Xinduo Lin
中科院分区：
文献类型：
--
作者：
Y. Zhai;Y. Xiong;Shuzhen Yao;Xinduo Lin
中国中东部扬子克拉通是我国重要的Fe铜矿成矿区。根据区域地质和构造演化研究，该成矿带受控于大陆板块内的断裂和凹陷成因。燕山早期(侏罗纪)以西北西向和东西向为主的岩石圈断裂控制了铜(钼、金)矿化的分布，而燕山晚期(白垩纪)以北东向和东北向为主的岩石圈断裂控制了铜铁的成矿。矿区内矿田的分布受基底断裂(S)和近地表断裂(S)的双重控制。根据环状、线状断裂与侵入体的关系，提出了垂直分带的“三级”模式。对中生代火成岩和成矿作用进行了系统的岩石化学研究，确定了三个亚系列：(1)钙碱性中-硅质富钾亚系列；(2)钙碱性-中长英质富钠亚系列；(3)钙碱性中-镁铁亚系列。矿床成因类型多样，包括铁、铜夕卡岩、铜斑岩、铁矿浆注入、与次火山岩有关的宁武-庐宗铁矿床(从晚正岩浆到伟晶-气液-热液、中热-浅成热液)，以及再活化沉积型铁和(或)铜矿床。矿床成因类型形成两个成矿系列：(1)沉积成矿系列(主要活动于古生代)；(2)由三个亚系列组成的岩浆-热液成矿系列(主要活动于侏罗纪和白垩纪)，后者在本区更为重要。这两个成矿系列的叠加和复合形成了本区多种类型的成矿作用。
The Eastern Yangtse Craton of central to eastern China is an important FeCu metallogenic province. Based on studies of the regional geology and tectonic evolution, this metallogenic belt is controlled by faults and aulacogens in the continental plate. In the Early Yanshan Epoch (Jurassic), the dominant west-northwest and east-west lithospheric faults controlled the distribution of Cu (Mo, and Au) mineralization, whereas in the Late Yanshan Epoch (Cretaceous) the north-northeast and northeast lithospheric faults controlled CuFe mineralization. In a mineral district, the distribution of ore-fields is under the dual control of basement fault(s) and near-surface fault(s). Based on the relation of ring and lineament faults to intrusions, a ‘three-level’ model of vertical zonation is proposed. Systematic petrochemical studies of Mesozoic igneous rocks and mineralization identify three subseries: (1) a calc-alkaline, intermediate to silicic subseries rich in potassium; (2) a calc-alkaline, intermediate to felsic subseries rich in sodium; and (3) a calc-alkaline, intermediate to mafic subseries rich in sodium. Genetic types of ore deposits are diverse, including Fe and Cu skarns, Cu porphyries, Fe ore magma injections, Ningwu-Luzong Fe deposits (from late orthomagmatic to pegmatitic-pneumato-hydrothermal, and to mesothermal-epithermal) associated with subvolcanic rocks, and remobilized sedimentary Fe and/or Cu deposits. The genetic types of ore deposits form two metallogenic series: (1) a sedimentary metallogenic series (active mainly in the Paleozoic), and (2) a magmatic-hydrothermal metallogenic series consisting of three subseries (active predominantly in the Jurassic and Cretaceous), with the latter being more important in this region. The superposition and compounding of these two metallogenic series contribute to many styles of mineralization in this mineral province.