| 扬子地块西北缘震旦系灯影组铅锌矿的成矿地质背景 |
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| 引用本文： | 陈高潮,王炬川,张俊良,张清盛,孔文年,陈隽路,李金超.扬子地块西北缘震旦系灯影组铅锌矿的成矿地质背景[J].地质通报,2012,31(5):773-782. |
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| 作者姓名： | 陈高潮 王炬川 张俊良 张清盛 孔文年 陈隽路 李金超 |
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| 作者单位： | 1. 中国地质调查局西安地质调查中心,陕西西安,710054
2. 陕西省地矿局地质调查院,陕西西安,710016 |
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| 基金项目： | 中国地质调查局项目《1∶25万南江市幅(I48C004004)、安康市幅(I49C004001)区域地质调查(修测)》(编号:1212010510406) |
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| 摘 要： | 按照“构造控盆、盆控相、相控矿”的思路，对铅锌矿形成的沉积盆地、含矿建造、控矿构造、岩相古地理等成矿条件进行研究，分析成矿特点，总结成矿规律。灯影期在扬子西北缘川西式基底上发育北东向、北北东向同生断裂，形成近北东向次级盆地和台地，构成台-盆相间的构造格局，次级盆地为局限盆地潮下相带沉积，台地边缘斜坡出现滑塌砾屑白云岩，沿同生断裂运移的含矿热液流体在角砾状白云岩中聚集成矿。研究结果表明，灯影组铅锌矿成矿明显受盆地半活动类型基底、镁质碳酸盐岩台地中次级盆地、控制次级盆地的同生断裂等因素的控制。
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| 关 键 词： | 角砾状白云岩 同生断裂 铅锌矿 碳酸盐台地 川西式半活动基底 扬子西北缘 |
Metallogenic geological background of lead-zinc polymetallic deposits of Sinian Dengying Formation in the northwestern margin of Yangtze landmass |
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| CHEN Gao-chao
,
WANG Ju-chuan
,
ZHANG Jun-liang
,
ZHANG Qing-sheng
,
KONG Wen-nian
,
CHEN Jun-lu
,
LI Jin-chao.Metallogenic geological background of lead-zinc polymetallic deposits of Sinian Dengying Formation in the northwestern margin of Yangtze landmass[J].Geologcal Bulletin OF China,2012,31(5):773-782. |
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| Authors: | CHEN Gao-chao WANG Ju-chuan ZHANG Jun-liang ZHANG Qing-sheng KONG Wen-nian CHEN Jun-lu LI Jin-chao |
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| Institution: | 1.Xi′an Center of Geological Survey,China Geological Survey,Xi′an 710054,Shaanxi,China; 2.Shaanxi Institute of Geological Survey,Shaanxi Bureau of Geology and Mineral Resources,Xi′an 710016,Shaanxi,China |
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| Abstract: | According to the train of thought "structure controls basin,basin controls facies and facies controls ore deposit",the authors studied metallogenic conditions of lead-zinc deposits such as sedimentary basin,ore-bearing formation,ore-controlling structure,lithofacies and paleogeography,analyzed metallogenic characteristics and summed up the ore-forming regularity.In Dengying period,NE-and NNE-trending contemporaneous faults were developed on the Chuanxi-style basement in the northwest margin of Yangtze plate and,as a result,nearly NE-trending second-order basins and platforms were formed,which constituted the structural framework.of the platform alternate with the basin.The second-order basin was characterized by infratidal zone sediments of restricted basin,slump dolorudite appeared on the marginal slope of the platform,and ore-bearing hydrothermal fluids that migrated along contemporaneous faults were concentrated in brecciform marble to form ore deposits.Studies show that lead-zinc mineralization of Dengying Formation was obviously controlled by such factors as semi-active type basement of the basin,second-order basins in magnesian carbonate rock platform and contemporaneous faults that control the second-order basin. |
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| Keywords: | brecciated dolomite contemporaneous fault lead-zinc deposit carbonate platform semi-active Chuanxi style basement northwestern margin of Yangtze landmass |
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