|本期目录/Table of Contents|

[1]杨皓,王东升,王宗起,等.陕西勉略地区铧厂沟造山型金矿构造控矿特征[J].地球科学与环境学报,2017,39(06):795-806.
 YANG Hao,WANG Dong-sheng,WANG Zong-qi,et al.Characteristics of Ore-controlling Structures of Huachanggou Orogenic Gold Deposit in Mianlue Area of Shaanxi, China[J].Journal of Earth Sciences and Environment,2017,39(06):795-806.
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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:
第39卷
期数:
2017年第06期
页码:
795-806
栏目:
基础地质与矿产地质
出版日期:
2017-11-15

文章信息/Info

Title:
Characteristics of Ore-controlling Structures of Huachanggou Orogenic Gold Deposit in Mianlue Area of Shaanxi, China
文章编号:
1672-6561(2017)06-0795-12
作者:
杨皓王东升王宗起王立新陈雷
1.中国地质大学(北京) 地球科学与资源学院,北京 100083; 2.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; 3.陕西省略阳县铧厂沟金矿,陕西 略阳 724312
Author(s):
YANG Hao WANG Dong-sheng WANG Zong-qi WANG Li-xin CHEN Lei
1. School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China; 2. MLR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China; 3. Huachanggou Gold Deposit of Lueyang County, Shaanxi Province, Lueyang 724312, Shaanxi, China
关键词:
构造解析造山型金矿构造期次挤压作用走滑作用印支期陕西
Keywords:
structural analysis orogenic gold deposit tectonic stage contraction strike-slip Indosinian Shaanxi
分类号:
P542+.2
DOI:
-
文献标志码:
A
摘要:
铧厂沟造山型金矿位于陕甘川金三角成矿区腹地勉县—略阳—宁强成矿带的西北侧。在矿区和外围构造以及显微构造综合研究的基础上,结合前人研究资料,探讨了该区构造对金矿的控制作用;结合区域构造演化,讨论了各期构造对成矿的影响及控制作用。结果表明:铧厂沟矿区及其附近在印支期至少存在两期构造运动,即俯冲-碰撞导致的SN向挤压(D1)以及近EW向走滑剪切(D2);SN向挤压(D1)形成了近EW向的片理及层间紧闭褶皱,这些EW向构造形成了矿区的构造格架,其中褶皱的发育造成了载金黄铁矿在转折端的富集,属于容矿构造;近EW向走滑剪切(D2)分为右行和左行剪切活动,造成了区内间隔分布的韧性剪切带,剪切带对其内部的黄铁矿进行了强烈改造,使其内部形成显微裂隙,成为Au沉淀富集的场所,从而控制了Au的进一步富集、沉淀,也属于容矿构造。这些认识表明铧厂沟金矿的形成与造山作用密切相关。
Abstract:
Huachanggou orogenic gold deposit is located on the northwest side of Mianxian-Lueyang-Ningqiang metallogenic belt, which belongs to Shaanxi-Gansu-Sichuan metallogenic province. Macro- and micro-structural observations were conducted in the ore district and peripheral area; based on the previous results obtained in the orefield, the ore-controlling structures of Huachanggou gold deposit were analyzed accordingly; combined with the tectonic evolution, the effect and control of structures on mineralization were discussed. The results show that there are at least two stages of tectonic movements in Huachanggou mine during Indosinian, i.e. intensively SN-direction contraction (D1) results from the subduction-collision process and nearly EW-direction strike-slip (D2); EW-direction strike structures (schistosity and tight folds), which are formed by SN-direction contraction (D1), are main host structures; metallogenic material (auriferous pyrite) transfers to the hinge of folds, causing the enrichment of orebodies; EW-direction strike-slip (D2) contributes to the formation of ductile shear belts, including dextral shear and left shear movements; ductile shear belts intensely reform the auriferous pyrite, leading to the formation of microcracks, which may supply the room for gold; this plays an important role on the enrichment of orebodies and belongs to host structures. It is suggested that Huachanggou gold deposit is closely related to orogenic processes.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2017-05-03
基金项目:国家重点研发计划项目(2016YFC0600202);中国地质科学院矿产资源研究所基本科研业务费专项资金项目(K1614)
作者简介:杨 皓(1990-),男,贵州遵义人,中国地质大学(北京)理学硕士研究生,E-mail:524819204@qq.com。
通讯作者:王东升(1988-),男,河南濮阳人,助理研究员,理学博士,E-mail:wangdsyzy@126.com。
更新日期/Last Update: 2017-12-15