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Metallogenic Epoch and Material Sources of Tongshanling Cu-Pb-Zn- polymetallic Ore Field in Southern Hunan Province, China 预览PDF
会议论文信息
期刊名称: Metallogenic Epoch and Material Sources of Tongshanling Cu-Pb-Zn- polymetallic Ore Field in Southern Hunan Province, China
责任者: 杨红梅 ;蔡应雄 ;王云峰 ;刘重芃 ;张利国 ;卢山松 ;邱啸飞 ;谭娟娟
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会议名称: 国际地质大会 International Geological Congress
届次: 35
会议地点: 南非
召开时间: 2016-08
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ISBN:
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摘要: The Tongshanling Cu-Pb-Zn-polymetallic ore field,located in the collage zone between the southern Hunan-northeastern Guangxi sag in the Yangtze block and the northern Guangdong sag in the Cathaysia block,is one of the representative fields in the Nanling metallogenic belt,China.Recent zircon U-Pb dating studies on the No.I and No.III Tongshanling granodioritic pluton show there probably had been three diagenetic stages of 177-167 Ma,~157 Ma,and 149-148 Ma in this ore field,but just one mineralization age of ~155 Ma has been reported so far.In order to confirm whether there are three mineralization stages corresponding to the three diagenetic stages,the mineralized skarns and sulfide ores were sampled from the Beihoushan deposit located in the northeast of the No. I Tongshanling pluton.The garnets picked from the skarns define an Sm-Nd isochrone age of 173±3 Ma (MSWD=1.3), the sphalerites from the ores define three Rb-Sr isochrone ages of 144±7 Ma (MSWD=4.4) for minerals,141±6 Ma (MSWD=3.8) for sulfide residues after the diluted acid leachating and of 141 ±3 Ma (MSWD=5.1) for minerals and sulfide residues,which are consistent within the error ranges.Considering the published Re-Os model age of 155±3 Ma (MSWD=1.5) and Sm-Nd isochron age of 155±8 Ma (MSWD=0.41) for olybdenite and garnets,respectively,separated from the skarn-type ore body in Qiaotoupu deposit located in the south of the No.I Tongshanling pluton, this study presents this ore field maybe had undergone three mineralization stages of ~173 Ma,~155 Ma and ~141-144 Ma corresponding to the three diagenetic stages.
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