Magmatism of Huangshan-Jing’erquan Ni-Cu Ore Deposit Belt and Relationship with Regional Strike-slip Structure in Xinjiang, China(PDF)
《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]
- Issue:
- 2018年第05期
- Page:
- 505-519
- Research Field:
- 基础地质与矿产地质
- Publishing date:
Info
- Title:
- Magmatism of Huangshan-Jing’erquan Ni-Cu Ore Deposit Belt and Relationship with Regional Strike-slip Structure in Xinjiang, China
- Author(s):
- SONG Xie-yan; DENG Yu-feng; XIE Wei; CHEN Lie-meng; YU Song-yue; LIANG Qing-lin
- 1. State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, Guizhou, China; 2. School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, Anhui, China; 3. College of Oceanography, Hohai University, Nanjing 210098, Jiangsu, China
- Keywords:
- magmatic Ni-Cu sulfide deposit; mantle-derived magmatism; orogenic belt; regional strike-slip structure; upwelling of the asthenosphere; mantle metasomatism; plate collision; breakoff of subduction oceanic slab
- PACS:
- P611.1+1；P597
- DOI:
- -
- Abstract:
- The Ni-Cu sulfide deposits in orogenic belts are very important in China. Nickel metal reserves of the Ni-Cu sulfide deposits discovered in orogenic belts, China, including a series of deposits in the southern margin of Central Asian orogenic belt and the large Xiarihamu Ni-Co deposit in East Kunlun orogenic belt, are more than 300×104 t. These discoveries make China having the most abundant magmatic sulfide deposits in orogenic belts over the world. However, some important issues on the formation of such deposits have not been well understood. For instance, what results in the formation of those large and super-large Ni-Cu sulfide deposits in the orogenic belts? What are the features of the related magmatism? When the magmatism occurs during tectonic evolution of the orogenic belts? What is the mechanism leading the extensive mafic magmatism? The above issues predominantly based on the recent studies of Huangshan-Jing’erquan Ni-Cu sulfide deposit belt as well as Permian regional strike-slip structure in northern Tianshan, Xinjiang were focused on. The results show that the collision between Junggar-Kazakhstan block and Tarim block along with regional dextral strike-slip structure in Permian results in break-off of the subduction oceanic slab and upwelling of the asthenosphere; the upwelling of the asthenosphere causes extensive melting of itself, and the metasomatized wedge mantle produces mafic magma; the strike-slip faults provide the pass way for the ascending mafic magmas and create spaces for the magmatic sulfide mineralized intrusions in the crust of Huangshan-Jing’erquan Ni-Cu sulfide deposit belt.
Last Update: 2018-10-01