Scheelite Sm-Nd dating and quartz Ar-Ar dating for Woxi Au-Sb-W deposit, western Hunan

	Scheelite Sm-Nd dating and quartz Ar-Ar dating for Woxi Au-Sb-W deposit, western Hunan
	Jiantang Peng; Ruizhong Hu; Junhong Zhao; Yazhou Fu; Yuanxian Lin
	2003
发表期刊	Chinese Science Bulletin
卷号	48 期号:23 页码:2640-2646
合作性质	其它
摘要	Scheelite Sm-Nd and quartz Ar-Ar dating were accomplished for the Woxi Au-Sb-W deposit in western hunan. The results show that the Sm and Nd concentrations of scheelite are relatively high, and Sm/Nd ratios are usually high and variable. In the 147Sm/144Nd vs. 143Nd/144Nd diagram, the disseminated scheelites show a good linear array, which corresponds to an isochron age of 402 ±6 Ma and an initial 143Nd/144Nd ratio of 0.510544± 9 (2oσ) with a εNd(t) value of −30.7. The Ar-Ar age spectra for 2 quartz samples display the saddle shape. The minimum apparent age, plateau age and isochron age of each quartz sample generally overlap within errors; and both the minimum apparent ages of 420±20 and 414 ± 19 Ma coincide well with the scheelite Sm-Nd age. Both Sm-Nd and Ar-Ar dating results reveal that the Au-Sb-W mineralization at Woxi district took place in the Late Caledonian. This is in good agreement with the tectonic evolution of the Xuefengshan district and with some geochronological data available for Au, Sb and W deposits in this area. The low initial Nd isotope ratio of scheelites suggests that the fluid responsible for Au-Sb-W mineralization at the Woxi is of deep crustal origin and probably originated from the underlying Archaean continental basement rather than the host Proterozoic strata in western Hunan. The constraints on the mineralization time and on the fluid source provide insight into the genesis of the Woxi deposit.
关键词	Sm-nd Isotope Dating Scheelites Ar-ar Isotope Dating Au-sb-w Deposit West Hunan
学科领域	矿床地球化学
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/3106
专题	矿床地球化学国家重点实验室_矿床地球化学国家重点实验室_期刊论文矿床地球化学国家重点实验室
推荐引用方式 GB/T 7714	Jiantang Peng,Ruizhong Hu,Junhong Zhao,et al. Scheelite Sm-Nd dating and quartz Ar-Ar dating for Woxi Au-Sb-W deposit, western Hunan[J]. Chinese Science Bulletin,2003,48(23):2640-2646.
APA	Jiantang Peng,Ruizhong Hu,Junhong Zhao,Yazhou Fu,&Yuanxian Lin.(2003).Scheelite Sm-Nd dating and quartz Ar-Ar dating for Woxi Au-Sb-W deposit, western Hunan.Chinese Science Bulletin,48(23),2640-2646.
MLA	Jiantang Peng,et al."Scheelite Sm-Nd dating and quartz Ar-Ar dating for Woxi Au-Sb-W deposit, western Hunan".Chinese Science Bulletin 48.23(2003):2640-2646.

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