Pb Isotope Composition and Its Geological Significance of Antuoling Porphyry Molybdenum Deposit in North Taihang Mountain
详细信息
- 责任者：Lu Ren (Henan Nonferrous Metals Geological Exploration Institute ; Zhengzhou 450052 ; China) ; Liang Tao
- 刊名：Mineral Resources and Geology
- 出版年：2013
- 卷期：27(1)
- 关键词：斑岩钼矿床 ; porphyry molybdenum deposit ; 铅同位素 ; lead isotopes ; 太行山 ; Taihang Mountains
- 页码：p.83-88
- 图表：illus., 1 table, 35 refs.
- 分类号：1001
- issnNo：ISSN1001-5663
- isbnNo：CN45-1174/TD
摘要
The Pb isotope analysis on molybdenite and pyrite in Antuoling porphyry molybdenum deposit was conducted.The ratios of 206Pb/204Pb,207Pb/204Pb and 208Pb/204Pb in two molybdenite samples are 17.246 and 17.822,15.396 and 15.495,37.409 and 37.239,respectively.The ratios of 206Pb/204Pb in two pyrite samples are 16.519 and 16.366;207Pb/204Pb ratio and 208Pb/204Pb ratio are 15.251 and 15.229,36.571 and 36.410,respectively.In 206Pb/204Pb-207Pb/204Pb diagram,points of pyrite samples from Antuoling porphyry molybdenum deposit are close to Pb evolutionary trend line of lower crust,and points of molybdenite samples are close to Pb evolutionary trend line of upper mantle.In Δβ-Δγ of Pb isotopes diagram,data points of samples from Antuoling porphyry molybdenite deposit locate in mantle source area and orogeny source area.The features of Pb isotope tracing of Antuoling porphyry molybdenite deposit suggest that tectonic movement in metallogenic epoch has affected lower crust and upper mantle,and it is consistent with the deep dynamic process delamination in Antuoling lithosphere.Antuoling porphyry molybdenum deposit is controlled by intraplate orogenic movement of Taihang mountain,and its formation is irrelevant with subduction of Pacific plate.
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