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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
Source PublicationChinese Science Bulletin
Volume48Issue:23Pages:2640-2646
metadata_24其它
AbstractScheelite 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.
KeywordSm-nd Isotope Dating Scheelites Ar-ar Isotope Dating Au-sb-w Deposit West Hunan
Subject Area矿床地球化学
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/352002/3106
Collection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
Recommended Citation
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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