胶东地区金矿床流体包裹体的HeAr同位素组成及成矿流体来源示踪张连昌.pdf

1000 0569/ 2002/ 018( 04) 0559 65 A cta P etr olog ica S inica　岩石学报 He Ar 张连昌　沈远超　李厚民　曾庆栋　李光明　刘铁兵 ZHANG LianChang SHEN YuanChao LI HouMin ZENG QingDong LI GuangMing and LIU T ieBing, , , , , 100029 I nst itut e of Geology and G eop hy s ics , Chinese A cademy of S ci ences , B eij ing 100029, Chi na 2001 06 14 收稿, 2002 09 15 改回. Zhang LC, Shen YC, Li HM , Zeng QD, Li GM and Liu TB. 2002 . Helium and argon isotopic compositions o luid inclusions and tracing to the source o ore- orming luids or Jiaodong gold deposits . A cta Petr ologica Sinica , 18(4) : 559 565 AbstractT he Jiaodong gold deposit s have attracted the attention of many geologists and their metallogenesis has long been in dispute The authors choose pyrite samples from some gold deposits in Jiaodong area t o analyze their helium and argon. 3 4 isot opic com positions of fluid inclusions. T he analytical result s show t hat He/ He ratios of Jiaodong gold deposits are 0.43 3 4 3 4 2. 36 R/ Ra, and He/ He 1. 0 R/ Ra for Pengjiakuang and Fayunkuang gold deposit , He/ He 1. 0 R/ Ra for Denggezhuang and Jiaojia gold deposit. 40Ar/ 36Ar ratios of ore form ing fluids are 393310 for Pengjiakuang and Fayunkuang 40 36 40 36 gold dcposits, similar to the isot opic components of atmosphere helium ( Ar/ Ar= 295.5) ; Ar/ Ar ratios of Jiaojia and Denggezhuang gold deposits are 500 1148. T he compositions of He Ar isotopic syst em suggest that the source of ore forming fluids is mainly meteoric w ater for Pengjiakuang and Fayunkuang gold deposits and mantle fluids for Denggezhuang, and Jiaojia gold deposits. T he relation between H O and He