安徽铜陵凤凰山夕卡岩型铜矿床中辉钼矿 Re -O s.PDF

1000-0 69/2010/026( 03)-078 -96 A cta P etrolog ica Sinica 岩石学报 Re-Os * 1, 2 1 1 1 瞿泓滢 裴荣富 王永磊 李进文 1, 2 1 1 1 QU HongY ing , PE IRongFu , WANG YongLei and LI JinW en 11 , , 100037 21 , 210093 11MLR K ey Laboratory of M eta llogeny and M inera l A ssessm en,t Institute of M inera l R esources, Ch inese A cademy of Geolog ical Sc iences, B eij ing 100037, China 21S tateK ey L aboratory f orM inera lD e osits R esearch, Nanj ing University, Nanj ing 210093, China 2009-11-07 收稿, 2010-01-0 改回1 Qu HY, Pei RF, W ang YL and L i JW 1 20101 Re-Os dating of m olybdenite from t e Feng uangs an skarn Cu deposit in Tongling, An uiP rovince and its geological significance1 A cta P e trolog ica S in ica, 26( 3): 785- 796 Abstract Tongling is one of the most sign ificant ore cluster area in theM iddle-Low er Y angtze R iver Cu-Au-Fe-M o m etallogen ic belt1 The Fenghuangshan Cu deposit is a typ ical skarn type Cu deposit in the Tongling ore cluster area1 In this study w e yield m olybden ite Re-O s model ages ranging from 13911? 214 to 14210 ? 21 2M a and the isochronal age 1411 1? 114M a1 The resu lts show that Cu m ineralization of the Fenghuangshan Cu deposit occurred at the Early Cretaceous, wh ich are slightly younger than quartz m onzod iorite and granod iorite( 14412M a, zircon U-Pb age) 1 The ages indicate close temporal relations bewt een Cu m ineralization and m agm atism 1 Our study is cons isten t to previous stud ies that Cu m ineralization occurred at the M esozoic second m ineralization stage, respond ing to theM esozoic lithosphere delam ination even t in south of Ch ina1 K ey words M olybden ite Re-Os isotope age; Skarn; Fenghuangshan Cu deposit; Tongling ore c