eCite Digital Repository

Pyrite trace element geochemistry of mafic granulite xenoliths from Xikeer: implications for the source of Cu in the exotic sediment-hosted mineralization in the northwest Tarim Basin (Northwest China)

Citation

Chen, H and Wei, T and Falloon, TJ and Chen, M, Pyrite trace element geochemistry of mafic granulite xenoliths from Xikeer: implications for the source of Cu in the exotic sediment-hosted mineralization in the northwest Tarim Basin (Northwest China), Mineralium Deposita: International Journal of Geology, Mineralogy, and Geochemistry of Mineral Deposits, 46, (8) pp. 1001-1006. ISSN 0026-4598 (2011) [Refereed Article]


Preview
PDF
Restricted - Request a copy
467Kb
  

Copyright Statement

Copyright 2011 Springer-Verlag

DOI: doi:10.1007/s00126-011-0387-y

Abstract

The Xikeer mafic granulite xenoliths are hosted by a Cenozoic basanite sill (бн20 Ma) in the northwest Tarim Basin, northwest China. Sulfides, identified in these xenoliths consist mainly of pyrite. Two groups of pyrite (types A and B) can be distinguished based on petrography and trace element geochemistry, as determined by laserablation ICP-MS analysis. Type A pyrite is subhedral and in general has lower trace element abundance than type B pyrite. Type B pyrite is fractured with ragged anhedral morphology and has extremely high Cu, Tl, Ni, and Co abundance. The low Co and Ni contents combined with a positive correlation between Cu, Cr, and Pb all indicate that the type A pyrite may have formed from a high-temperature magmatic hydrothermal fluid. In contrast, the Cu-, Tl-, Ni-, and Co-rich type B pyrite was probably formed in a relatively low-temperature basinal environment. The Cu mineralization at Xikeer can be explained when Cu, Tl, Ni, and Co were leached from the intruded basanites and subsequently enriched in circulating basin brines. Such enrichment of Cu in basin brines could provide an important Cu source for the Cu mineralization in the Xikeer district and other Cenozoic sub-basins in the Tarim Basin.

Item Details

Item Type:Refereed Article
Keywords:granulite xenoliths pyrite geochemistryTarim Basin
Research Division:Earth Sciences
Research Group:Geology
Research Field:Igneous and Metamorphic Petrology
Objective Division:Mineral Resources (excl. Energy Resources)
Objective Group:Mineral Exploration
Objective Field:Copper Ore Exploration
Author:Chen, H (Dr Huayong Chen)
Author:Falloon, TJ (Dr Trevor Falloon)
ID Code:74879
Year Published:2011
Web of Science® Times Cited:2
Deposited By:Centre for Ore Deposit Research - CODES CoE
Deposited On:2011-12-14
Last Modified:2012-05-10
Downloads:0

Repository Staff Only: item control page