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| 江西虎家尖银金矿区构造特征与矿化研究 | |
| 引用本文： | 董法先.江西虎家尖银金矿区构造特征与矿化研究[J].地质力学学报,1995,1(2):50-58. |
| 作者姓名： | 董法先 |
| 作者单位： | 中国地质科学院地质力学研究所 |
| 基金项目： | 本文系地矿部定向科研项目的一部分 |
| 摘 要： | 虎家尖银金矿区位于华夏系婺源-万年断褶带的南段,以NE向压扭性断裂带为主要构造型式。NE向压扭性断裂的成生演化,大体经历了3个阶段:早期为左行压扭活动阶段,主要表现为塑-脆性形变;中期阶段以张扭性的脆性形变为主;晚期则显示出右行压扭的塑-脆性形变特征。笔者认为,矿区构造活动早期受华夏系应力场的控制,晚期受新华夏系应力场的制约,并认为矿区NE向断裂是新华夏系泰山式构造与华夏系构造复合的产物。 NE向断裂带也是矿区最重要的成矿控矿构造,其中虎家尖-峡岭(水库)断裂带北亚带控制矿区主要的银、金矿化带,南亚带则以银金和钨锑矿化为主;而库田-唐家边断裂带主要控制钨矿化.此外,矿体的分布、形态、规模、富集程度、矿化形式及矿化类型,均与NE向压扭性断裂的形变阶段有关,显示构造演化与成矿作用的同步性。 |
| 关 键 词： | 虎家尖银金矿区 控矿构造 矿化类型 |
GEOLOGICAL STRUCTURES AND THEIR CONTROL OF SILVER-GOLD ORES IN HUJIAJIAN AREA, JIANGXI |
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| Dong Faxian.GEOLOGICAL STRUCTURES AND THEIR CONTROL OF SILVER-GOLD ORES IN HUJIAJIAN AREA, JIANGXI[J].Journal of Geomechanics,1995,1(2):50-58. | |
| Authors: | Dong Faxian |
| Institution: | Institute of Geomechanics, CAGS |
| Abstract: | The Hujiajian silver-gold area is located in the southern part of the Wuyuan-Wannian fault-fold zone with the NE-trending compressoshear faults as the leading structural elements.The NE-trending faults have experienced three stages of evolution:in the early stage, they behaved as sinistral compressoshear faults, accompanied by plastic-brittle deformationl in the middle stage, they turned into tensoshear faults characterized by dominantly brittle deformation;in the stage, dextral compressoshear movement occurred with associated plastic-brittle deformation.It is therefore considered by the author that the tectonic activities in the area were governed by NE-treading Cathaysian stress field in the early stage and by NNE-trending Neocathaysian stress field in the late stage, and that the NE-trending faults were produced by the compounding of the NE-trending Taishan-type structures with the Cathaysian structures. The NE-trending fault zones are the major ore-controlling structures.Silver-gold mineralization in chiefly controlled by the north subzoue of the Hujiajian-Xialing fault zone.There occur silver-gold and tungsten-antimony mineralization in the south subzone.Tungsten mineralization is confined to the Kutian-Tangjiabian fault zone.In addition, the distribution, shape, size, and content of the ore bodies as well as their mineralization pattern and type are closely related to the NE-trending compressoshear faults.There is some synchronism between structural evolution and mineralization. |
| Keywords: | ujiajian silver-gold area ore-controlling structure mineralization pattern and type |
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