Geochemical Characteristics and Source of OreForming Fluid of Duolanasayi Gold Deposit.pdfVIP

V ol. 22 No. 1 CHINESE JOURNAL OF GEOCHEMISTRY 2003 Geochemical Characteristics and Source of Ore-Forming Fluid of Duolanasayi * Gold Deposit, Xinjiang XIAO HUILIANG ( ) 1, 2) , ZHOU JIYUAN ( ) 2) , WANG HENIAN ( ) 1) , DONG YONGGUAN ( ) 2) , JI JUNFENG ( ) 1) , AND ZHAO YU ( ) 2) 1) ( State Key Laboratory or M ineral Deposit s Research, Department o Earth Sciences, Nanjing University, Nanjing 2 10093, China) 2) ( Nanjing Inst itute o Geology and Mineral Resources, Nanjing 2100 16, China) Abstract: The Duolanasayi gold deposit , 60 km NW o Habahe County in Xinjiang, is a medium- large scale gold deposit controlled by the coupled ore- orming processes involving brittle- ductile shear- ing , albitite veins, and post-stage magma solution . Fluid inclusion studies indicate that the homoge- nization temperatures range rom 160 e to 315e w ith the peak values o 220 - 300e . M ineralization pressures are rom 21. 0 MPa to 64. 5 MPa. Ore luid inclusions contain Ca2+ , K+ , Na+ , Mg2+ ; - 2- - - - + - 6 HCO , SO , HS , F , Cl and Au ( maximum : 5. 3@ 10 ) , and the mineralizing luid is a 3 4 H O- CO system. Sul ur, hydrogen , oxygen and strontium isotopic compositions ( DS= - 2 . 46j - 2 2 - 7 . 02j , D18 O