Isotope (S-Sr-Nd-Pb) constraints on the genesis of the ca. 850 Ma Tumen   Mo-F deposit in the Qinling Orogen, China

doi:10.1016/j.precamres.2015.05.019

CORC > 北京大学 > 地球与空间科学学院

	Isotope (S-Sr-Nd-Pb) constraints on the genesis of the ca. 850 Ma Tumen Mo-F deposit in the Qinling Orogen, China
	Deng, Xiao-Hua ; Chen, Yan-Jing ; Bagas, Leon ; Zhou, Hong-Ying ; Yao, Jun-Ming ; Zheng, Zhen ; Wang, Pin
刊名	PRECAMBRIAN RESEARCH
	2015
关键词	Sulfur isotopes Sr-Nd-Pb isotope systematics Ore-forming fluid Tumen deposit Qinling Orogen Molybdenite-fluorite vein MOLYBDENITE-FLUORITE DEPOSIT HENAN PROVINCE IMPLICATIONS TECTONIC EVOLUTION FLUID INCLUSIONS SOUTH CHINA COLUMBIA SUPERCONTINENT PORPHYRY SYSTEMS INTRUSIVE ROCKS GOLD DEPOSIT ORE GENESIS
DOI	10.1016/j.precamres.2015.05.019
英文摘要	The Tumen Mo-F deposit is located on the southern margin of the North China Craton in central China. The deposit represents a fluorite-vein system hosted by carbonate rocks in the Neoproterozoic Luanchuan Group. Previous studies identify four hydrothermal stages at the deposit characterized by: Stage 1 veins of white fluorite, Stage 2 purple fluorite-molybdenite-pyrite (-galena), Stage 3 calcite-galena-pyrite-sphalerite (-chalcopyrite), and Stage 4 carbonate assemblages. The delta S-34 values for sulfides from the Tumen deposit range between -7.1 and 5.0 parts per thousand, with a bimodal distribution. The Stage 2 sulfides have delta S-34 values of -2.7 to 5.0 parts per thousand that are similar to that of granitic rocks, but different from andesite in the Xiong'er Group, amphibolitic gneiss in the Taihua Supergroup and the carbonaceous shale and chert in the Luanchuan Group. The near-zero delta S-34 values indicate a possible magmatic source for the Stage 2 fluids. However, the delta S-34 values for the Stage 3 sulfides have negative mean and a restricted range from -7.1 to -4.6 parts per thousand, which is different from that of the Xiong'er Group and Taihua Supergroup. The S-34-depleted fluid for the Stage 3 sulfides was inherited from the host rocks in the Luanchuan Group with low delta S-34 values of -12.4 to 7.2 parts per thousand. New Sr-Nd-Pb isotope data obtained from fluorite at Tumen indicate that the fluorite has higher Pb-isotope ratios, higher epsilon Nd(t) and lower I-Sr(t) values than the host rocks. The results suggests that the ore-forming fluids had epsilon Nd(t)> -4.8, I-Sr(t)<0.7068, (Pb-206/Pb-204)(i)>17.998, (Pb-207/Pb-204)(i)<15.576 and (Pb-208/Pb-204)(i)<38.201, which overlap the values of (epsilon Nd(t) = -3.8 to -1.3, I-Sr(t) = 0.7006-0.7061 for Neoproterozoic syenite in Qinling Orogen. This suggests that the deposit is related to a magmatic hydrothermal vein system associated with Neoproterozoic syenitic magmatism. (C) 2015 Elsevier B.V. All rights reserved.; National Basic Research Program [2012CB416602, 2006CB403508]; National Natural Science Foundation of China [41202050, 41372085, 41373053, 41403032]; China Postdoctoral Science Foundation [2012M510261]; SCI(E); ARTICLE; yjchen@pku.edu.cn; 108-118; 266
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/416975]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Deng, Xiao-Hua,Chen, Yan-Jing,Bagas, Leon,et al. Isotope (S-Sr-Nd-Pb) constraints on the genesis of the ca. 850 Ma Tumen Mo-F deposit in the Qinling Orogen, China[J]. PRECAMBRIAN RESEARCH,2015.
APA	Deng, Xiao-Hua.,Chen, Yan-Jing.,Bagas, Leon.,Zhou, Hong-Ying.,Yao, Jun-Ming.,...&Wang, Pin.(2015).Isotope (S-Sr-Nd-Pb) constraints on the genesis of the ca. 850 Ma Tumen Mo-F deposit in the Qinling Orogen, China.PRECAMBRIAN RESEARCH.
MLA	Deng, Xiao-Hua,et al."Isotope (S-Sr-Nd-Pb) constraints on the genesis of the ca. 850 Ma Tumen Mo-F deposit in the Qinling Orogen, China".PRECAMBRIAN RESEARCH (2015).