湘西合仁坪金矿床角砾岩的地质特征及形成机制
Geological characteristics and formation mechanism of breccias in Herenping gold deposit, western Hunan Province
查看参考文献50篇
|
文摘
|
湘西合仁坪钠长石-石英脉型金矿中,角砾岩普遍发育,主要分布于矿脉中,与金成矿关系密切。在详细的野外观察和室内研究的基础上,文章对合仁坪金矿床中角砾岩的形态、大小及胶结物进行了较系统的研究,并结合角砾岩的矿物组合特征,探讨了该区角砾岩的形成机制。研究表明,合仁坪金矿床中的角砾岩大多数呈原地破裂特征,角砾分选差,成分简单,且角砾之间的拼合性较好,为钠长石、石英等热液矿物所胶结,角砾的长轴方向大致具有定向排列的特点,表现出明显的液压致裂特征,反映出成矿流体的特征。研究区的液压致裂作用具有脉动性,每期液压致裂作用大致可分为应力腐蚀、岩石破碎、裂隙愈合3个阶段。 |
|
其他语种文摘
|
Breccias are widespread in the Herenping albite-quartz lode deposit, western Hunan Province. Breccias are mostly distributed in ore veins and are closely associated with gold mineralization. Based on detailed field observation and indoor study, the authors systematically studied the morphology and size of fragments as well as the cements in breccias. In combination with the mineral assemblage, the formation mechanism for breccias was further ascertained. It is shown that most breccias are in-situ fractured, poorly sorted and simple in composition, and that slate fragments are usually in good collage and cemented by hydrothermal albite and quartz. The long-axis of fragments is approximately aligned. All these characteristics show that the breccias in the Herenping mining district were caused by hydraulic fracturing, which can reveal the characteristics of ore-forming fluid. It is concluded that hydraulic fracturing in the studied deposit was continual and periodic, and each period can be divided into three stages: Wear erosion, rock fracturing and crack sealing. |
|
来源
|
矿床地质
,2016,35(4):641-652 【核心库】
|
|
DOI
|
10.16111/j.0258-7106.2016.04.001
|
|
关键词
|
地质学
;
角砾岩
;
形成机制
;
液压致裂
;
合仁坪脉型金矿
;
湘西
|
|
地址
|
1.
中南大学地球科学与信息物理学院, 有色金属成矿预测教育部重点实验室, 湖南, 长沙, 410083
2.
中南大学地球科学与信息物理学院, 有色金属成矿预测教育部重点实验室;;矿床地球化学国家重点实验室, 湖南, 长沙, 410083
|
|
语种
|
中文 |
|
文献类型
|
研究性论文 |
|
ISSN
|
0258-7106 |
|
学科
|
地质学 |
|
基金
|
国家自然科学基金项目
|
|
文献收藏号
|
CSCD:5778089
|
参考文献 共
50
共3页
|
|
1.
Baker E M. Hydrothermal breccia pipes.
EGRU Contribution,1986:1-45
|
被引
2
次
|
|
|
|
|
2.
Bryner L. Breccia and pebble columns associated with epithermal ore deposits.
Econ. Geol,1961,56:488-508
|
被引
11
次
|
|
|
|
|
3.
Cas R. Hydrothermal breccia textures and processes: Lisca Bianca Islet,Panarea volcano,Aeolian Islands,Italy.
Econ. Geol,2011,106:437-450
|
被引
5
次
|
|
|
|
|
4.
Chi G X. Hydrodynamic analysis of clastic injection and hydraulic fracturing structures in the Jinding Zn-Pb deposit,Yunnan,China.
Geoscience Frontiers, (in Chinese with English abstract),2012,3:73-84
|
被引
1
次
|
|
|
|
|
5.
Clark C. Hydrothermal brecciation due to fluid pressure fluctuations: Examples from the Olary Domain, South Australia.
Tectonophysics,2003,366:187-206
|
被引
5
次
|
|
|
|
|
6.
Cox S F. Principles of structural control on permeability and fluid flow in hydrothermal systerms.
Society of Economic Geologists Reviews,2001,14:1-24
|
被引
2
次
|
|
|
|
|
7.
Fyfe W S.
Fluids in the earth crust,1978:253-274
|
被引
1
次
|
|
|
|
|
8.
Germanovich L N. Hydraulic fracture with multiple segments I. Observations and model formulation.
International Journal of Rock Mechanics and Mining Sciences,1997,34:1-19
|
被引
2
次
|
|
|
|
|
9.
Groves D I. Lode-gold deposits of the Yilgarn Block: Products of late Archaean crustal-scale overpressured hydrothermal systems.
Geologies Society Special Publication, 95,1995:155-172
|
被引
1
次
|
|
|
|
|
10.
Hubbert M K. Mechanics of hydraulic fracturing.
Transactions of Society of Petroleum Engineers of AIME,1957,210:153-166
|
被引
83
次
|
|
|
|
|
11.
Jebrak M. Hydrothermal breccias in vein-type deposits: A review of mechanisms,morphology and size distribution.
Ore Geology Reviews,1997,12:111-134
|
被引
21
次
|
|
|
|
|
12.
Laznicka P. Breccias and coarse fragmentites: Petrology,environments, associations,ores.
Econ. Geol,1988,25:832
|
被引
1
次
|
|
|
|
|
13.
Lorilleux G. Polyphase hydrothermal breccias associated with unconformity-related uranium mineralization (Canada): From fractal analysis to structural significance.
Journal of Structural Geology,2002,24:323-338
|
被引
5
次
|
|
|
|
|
14.
Mahrer K D. A review and perspective on far-field hydraulic fracture geometry studies.
Journal of Petroleum Science and Engineering,1999,24:13-28
|
被引
12
次
|
|
|
|
|
15.
Ohle E L. Breccias in Mississippi Valley-type deposits.
Econ. Geol,1985,80:1736-1752
|
被引
9
次
|
|
|
|
|
16.
Ord A. The mechanics of hydrothermal systems: I. Ore systems as chemical reactors.
Ore Geology Reviews,2012,49:1-44
|
被引
7
次
|
|
|
|
|
17.
Ruggieri G. Multi-stage fluid circulation in a hydraulic fracture breccia of the Larderello geothermal field (Italy).
Journal of Volcanology and Geothermal Research,1999,90:241-261
|
被引
2
次
|
|
|
|
|
18.
Scholz C H.
The mechanics of earthquakes and faulting,1990:439
|
被引
22
次
|
|
|
|
|
19.
Sibson R H. Brecciation processes in fault zones: Inferences from earthquake rupturing.
Pure and Applied Geophysics,1986,124:159-175
|
被引
19
次
|
|
|
|
|
20.
Sibson R H. High-angle reverse faults, fluid-pressure cycling and mesothermal gold-quartz deposits.
Geology,1988,16:551-555
|
被引
137
次
|
|
|
|
|
了解气象卫星更多信息，请访问