Mineralogical Characteristics of Skarn in Tuosibasitao Iron-Copper-Gold Deposits of the Northern Margin of Junggar, Xinjiang, and Their Geological Significance

Shu-jun LV; Fu-quan YANG; Feng-mei CHAI; Zhi-xin ZHANG; Qiang LI

Rock and Mineral Analysis > 2013 > 32(3): 510-521.

Shu-jun LV, Fu-quan YANG, Feng-mei CHAI, Zhi-xin ZHANG, Qiang LI. Mineralogical Characteristics of Skarn in Tuosibasitao Iron-Copper-Gold Deposits of the Northern Margin of Junggar, Xinjiang, and Their Geological Significance[J]. Rock and Mineral Analysis, 2013, 32(3): 510-521.

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Mineralogical Characteristics of Skarn in Tuosibasitao Iron-Copper-Gold Deposits of the Northern Margin of Junggar, Xinjiang, and Their Geological Significance

1.
407 Team of Bureau of Geology and Mineral Exploration and Development of Hunan Province, Huaihua 418000, China
2.
Faculty of Earth Resources, China University of Geosciences (Beijing), Beijing 100083, China
3.
Key Laboratory of Metallogeny and Mineral Assessment, Ministry of Land and Resources; Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China
4.
Xinjiang Key Laboratory for Geodynamic Processes and Metallogenic Prognosis of the Central Asian Orogenic Belt, College of Geology and Mining Engineering, Xinjiang University, Urumqi 830049, China
5.
Xinjiang Research Center for Mineral Resources, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China

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Received Date: February 20, 2012
Accepted Date: February 04, 2013
Published Date: May 31, 2013

Abstract

ABSTRACT

The Tuosibasitao Fe-Cu-Au mineral deposit mainly occurs in the contact zone between the diorite porphyrite and basaltic volcanic rock of Middle Devonian Beitashan Formation in the forms of massives, heterogeneous gobbets, veinlets, breccia and veinlet-disseminated. The ore bodies in the ore deposit occur as stratoids or lenses, surrounded by skarn. The major and trace elements in magnetite, and chemical components in garnet, chinopyoxene and epidote from Tuosibasitao deposit were studied by Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) and Electron microprobe analyse. The results demonstrate that the end member of garnet is mainly grossularite and andradite. The composition of pyroxene was mainly diopside, with a small amount of augite. The epidote was enriched in Fe and Ca. The composition of these skarn minerals suggest that skarn in Tuosibasitao ore deposit is calcic skarn. In combination with the geological characteristics, it is possible that the skarns are formed by hydrothermal interaction with metamorphic volcanic, and the formation of magnetite is related to the retrogressive metamorphism of the skarn. Copper and gold mineralization occurred during the quartz-sulphide- carbonate period.
- Tuosibasitao,
- the northern margin of Junggar,
- iron-copper-gold deposit,
- skarn,
- magnetite,
- electron microprobe analysis

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References (46)

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