Geological characteristics and metallogenesis of the Keyinbulake copper-zinc deposit in Allay, Xinjiang.

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	Geological characteristics and metallogenesis of the Keyinbulake copper-zinc deposit in Allay, Xinjiang.
	Yang, FQ (Yang FuQuan); Mao, JW (Mao JingWen); Liu, F (Liu Feng); Dong, YG (Dong YongGuan); Chai, FM (Chai FengMei); Geng, XX (Geng XinXia)
刊名	ACTA PETROLOGICA SINICA
	2010
卷号	26 期号:2 页码:361-376
关键词	Copper-zinc deposit Fluid inclusions Carbon-oxygen-hydrogen stable isotope Metallogenesis Keymbulake Altay
ISSN号	1000-0569
英文摘要	The Keymbulake copper-zinc deposit occurs in the exocontact zones between Early Permian granite and Upper Silurian-Lower Devonian biohte-quartz- schist and meta-quartz-sandstone of Kangbutiebao Formation. On the basis of field evidence and petrographic analysis, the ore-forming process can be divided into three in periods; Skarn, hydrothermal and supergene The hydrothermal period represents the Malls copper-zinc mineralization episode in the Keymbulake deposit. Two types of fluid inclusions, namely H(2)O-NaCl and H(2)O-CO(2) (+/- CH(4)/N(2))-NaCl types, have been recognized in quartz and calcite. Homogenization temperatures of fluid inclusions vary from 146 to 448 degrees C, with peaks temperature of 170 degrees C, 270 degrees C and 350 degrees C. Salinity ranges from 0.2% to 46.9% NaCl(eq) at peaks around 1 5% NaCl(eq) and 5 5% NaCl(eq) Ore fluid densities range from 0. 55 to 1. 19g/cm(3) The delta(34) S values of sulphide associated with copper-zinc mineralization range from -8.4%o to 1.9 parts per thousand at a peak around 0 parts per thousand, indicating that the sulfur was derived from magma. The delta D values of quartz and calcite range from -130 parts per thousand to 79 parts per thousand, delta(18)O(SMOW) values range from 8.0 parts per thousand to 11. 6 parts per thousand, with corresponding delta(18)O(fluid) values of -1 7 parts per thousand to 4 43 parts per thousand The delta C(PDB) values in calcite from the Keymbulake copper-zinc deposit define a narrow range of -5.3 parts per thousand to -1.1 parts per thousand. The combined isotopic data imply that the ore-forming fluids of the Keymbulake copper-zinc deposit were mainly derived from magmatic fluids, with some contributions from meteoric water, and the carbon in the ore fluids was mainly derived from granitic magmatic source. The Keymbulake copper-zinc mineralization took place in the Early-Middle Permian with its metallogenesis related to the hydrothermal from granitic magmatic
学科主题	矿床地质
WOS关键词	HYDROTHERMAL ORE-DEPOSITS ; NORTHWEST CHINA ; ALTAI MOUNTAINS ; GOLD DEPOSIT ; QUARTZ ; PART ; VEIN ; GEOCHEMISTRY ; GRANITES ; ISOTOPE
WOS研究方向	Geology
语种	中文
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000275734400001
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39135]
专题	中国地质调查局
作者单位	Xinjiang Univ, Prospecting Engn Program, Urumqi 830046, Peoples R China
推荐引用方式 GB/T 7714	Yang, FQ ,Mao, JW ,Liu, F ,et al. Geological characteristics and metallogenesis of the Keyinbulake copper-zinc deposit in Allay, Xinjiang.[J]. ACTA PETROLOGICA SINICA,2010,26(2):361-376.
APA	Yang, FQ ,Mao, JW ,Liu, F ,Dong, YG ,Chai, FM ,&Geng, XX .(2010).Geological characteristics and metallogenesis of the Keyinbulake copper-zinc deposit in Allay, Xinjiang..ACTA PETROLOGICA SINICA,26(2),361-376.
MLA	Yang, FQ ,et al."Geological characteristics and metallogenesis of the Keyinbulake copper-zinc deposit in Allay, Xinjiang.".ACTA PETROLOGICA SINICA 26.2(2010):361-376.