| 华北地台北缘燕辽钼（铜）成矿带矿床地质特征及动力学背景 |
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| 引用本文：.2006.Geological characteristics and geodynamic background of molybdenum (copper) de posits along Yanshan_Liaoning metallogenic belt on northern margin of Nort h China block[J].Mineral Deposits,25(5):598~612 |
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| 基金项目:中国地质调查局国土资源大调查项目（200413000026，1212010634001） |
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| 中文摘要:
华北地台北缘是中国重要的多金属成矿带，中段部位钼（铜）矿床的分布受区域EW向、NE向、NNE向断裂的联合控制。成矿带东端辽西地区以钼矿为主，西端冀北地区以铜（钼）矿为主。钼矿床的形成与燕山期中酸性小侵入体关系密切，矿床多产于花岗斑岩体之中或内外接触带中，矿床类型以斑岩型、斑岩_矽卡岩型、矽卡岩型为主。同位素研究表明，钼（铜）矿床成矿物质及成矿流体主要来源于下地壳或与太古代结晶基底有关的花岗岩；钼矿的形成主要与中生代富硅、富钾质花岗岩有关，而与铜矿成因有关的花岗岩酸碱度相对较低。成矿年代学研究表明，燕辽钼（铜）成矿带大规模成矿作用发生于180 Ma左右和140 Ma左右2个时期，其对应的成矿动力学背景分别为华北板块与西伯利亚板块后碰撞造山阶段和中国东部构造体制大转折晚期。
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| 中文关键词:地质学 燕辽钼（铜）成矿带 矿床类型 时空分布 成矿作用 成 矿动力学背景 |
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| Geological characteristics and geodynamic background of molybdenum (copper) de posits along Yanshan_Liaoning metallogenic belt on northern margin of Nort h China block |
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| Abstract:The northern margin of the North China craton is one of the most important polymetallic (Mo_Cu_Fe, Pb_Zn, Au, Ag) ore_forming areas in China. The Yanshan_Liaoning molybdenum (copper) metallogenic belt is located in this area and controlled jointly by EW_, NE_ and NNE_trending faults. Mineralization exhibits zoning distribution, with molybdenum deposits in western Liaoning whereas copper (molybdenum) deposits in northern Hebei. These deposits are associated with intermediate_acid granites in time and space. The molybdenum (copper) deposits are usually distributed along the endo_ or exo_contact zone of the granite porphyry, and belong to porphyry, porphyry skarn and skarn types. Sulfur and strontium isotope analyses show that ore_forming materials and ore_forming fluids were derived from the syntectic type granites of the lower continental crust. Molybdenum deposits are associated with Mesozoic Si and K_rich granite porphyry, whereas copper deposits are related to granites with relatively low acid_alkaline contents. Based on metallogenic chronology, the authors hold that there existed two pulses of large_scale mineralization (180 Ma and 140 Ma) in the Yanshan_Liaoning metallogenic belt, whose metallogenic geodynamic settings were the post_collisional orogeny of Northern China block and Siberian block and the late variation stage of the tectonic regime in eastern China, respectively. |
| keywords:geology Yanshan_Liaoning molybdenum (copper) metallogenic belt deposit type distribution metallogenesis metallogenic geodynamic settings |
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