Origin of fluids in the Hetaoping Pb-Zn deposit, Baoshan-Narong-Dongzhi block metallogenic belt, Yunnan Province, SW China

	Origin of fluids in the Hetaoping Pb-Zn deposit, Baoshan-Narong-Dongzhi block metallogenic belt, Yunnan Province, SW China
	Yang Yulong; Ye Lin; Cheng Zengtao; Bao Tan
通讯作者	Ye Lin
	2013
发表期刊	Journal of Asian Earth Sciences
卷号	73 期号:5 页码:362-371
摘要	The Hetaoping skarn type Pb-Zn deposit is located in the Baoshan-Narong-Dongzhi block metallogenic belt (BND belt), a belt between the Tengchong terrane and the Lanping basin. The deposit is hosted by marble of the upper Cambrian Hetaoping Formation and there are no outcrops of plutonic rocks present. This deposit is one of two large Pb-Zn deposits recently discovered in the BND belt. The Hetaoping deposit is a high Mn skarn. Four types of fluid inclusions were recognized in quartz from the deposit: vapor-rich inclusions (Type I), liquid-rich inclusions (Type II), pure vapor inclusions (Type III), and pure fluid inclusions (Type IV). The coexistence of Type I and Type III inclusions in Stage I (pre-ore stage) and Stage II (main ore stage) shows evidence of fluid boiling. Quartz-hosted fluid inclusions (Stage land Stage II) display high homogenization temperatures and salinities (134-315 degrees C; 3.7-18.6 wt% NaCl equivalent) but calcite-hosted fluid inclusions in Stage III (post-ore stage) record lower homogenization temperatures and salinities (85-214 degrees C; 0.5-5.4 wt% NaCl equivalent). These data suggest a possible mixing between primary magmatic water and meteoric water. Based on chromatography data, the fluid inclusions in quartz contain abundant CO2 and O-2 and subordinate CO, CH4 and C2H2 + C2H4, suggesting an oxidizing environment. Based on their Na/K and Cl/SO4 ratios, fluids contained in fluid inclusions are similar to volcanic spring waters. The low Na/K ratios (0.40-1.34) of the ore-forming fluids may have resulted from interaction with a deep alkaline intermediate-acid intrusion. Hydrogen and oxygen isotope determinations on quartz from different ore stages show low delta O-18 and delta D values relative to VSMOW (-4.3 parts per thousand to 2.3 parts per thousand; -109 parts per thousand to -91 parts per thousand), indicating that the ore-forming fluids were diluted by external fluid sources as the skam system cooled. Overall, geological and geochemical interpretations suggest that the Hetaoping deposit is a distal manganese skarn Pb-Zn deposit related to concealed intrusions.
关键词	Baoshan–narong–dongzhi Block Metallogenic Belt Fluid Inclusion Ore-forming Fluid Concealed Intrusion
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/352002/5035
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
通讯作者	Ye Lin
推荐引用方式 GB/T 7714	Yang Yulong,Ye Lin,Cheng Zengtao,et al. Origin of fluids in the Hetaoping Pb-Zn deposit, Baoshan-Narong-Dongzhi block metallogenic belt, Yunnan Province, SW China[J]. Journal of Asian Earth Sciences,2013,73(5):362-371.
APA	Yang Yulong,Ye Lin,Cheng Zengtao,&Bao Tan.(2013).Origin of fluids in the Hetaoping Pb-Zn deposit, Baoshan-Narong-Dongzhi block metallogenic belt, Yunnan Province, SW China.Journal of Asian Earth Sciences,73(5),362-371.
MLA	Yang Yulong,et al."Origin of fluids in the Hetaoping Pb-Zn deposit, Baoshan-Narong-Dongzhi block metallogenic belt, Yunnan Province, SW China".Journal of Asian Earth Sciences 73.5(2013):362-371.

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
Origin of fluids in （1979KB）			开放获取	使用许可	浏览下载