%0 Journal Article
%T Characteristics of ore-forming fluid and metallogenesis of the Tongkengzhang porphyry molybdenum deposit, Jiangxi Province<br>江西铜坑嶂斑岩钼矿床成矿流体特征与成矿作用研究
%A SUN Ji
%A MAO JingWen
%A XIE GuiQing
%A ZEN ZaiLin
%A SU HuiMin
%A LIU Yong
%A <br>孙嘉
%A 毛景文
%A 谢桂青
%A 曾载淋
%A 苏慧敏
%A 柳勇
%J 岩石学报
%D 2012
%I 
%X Tongkengzhang molybdenum deposit is a newly discovered deposit,which is mainly hosted by the Cretaceous granitic porphyry.Based on mineral assemblage and vein crosscutting relationships,the ore-forming process could be divided into three mineralization-alteration stages:Potassic stage,fluorite-biotite(muscovite)-K-feldspar-molybdenite stage,sericite-quartz-carbonate stage.The study of fluid inclusions shows that early ore-forming fluids are high salinity magmatic fluids,containing alkalic components and volatile phase,which formed in condition of high pressure(～1000bar)and high temperature(550～>600℃),and were separated to multiphase high salinity fluid inclusions and lower salinity vapor-rich fluid inclusions by boiling.With cooling of oreforming fluids(420～440℃)and release of pressure(320～360bar)led to re-boiling of ore-forming fluids,which caused precipitation of molybdenite.Give the evidence of widespread occurrence of high salinity(29.58%～44.12%NaCleqv)fluid inclusions in the sericite-quartz alteration related veins,indicating that the fluids caused the later alteration was dominated by the magmatic fluids,only a few quartz veins are primarily occupied by aqueous inclusions suggesting the mixture of magmatic fluids and meteoric fluids.Meanwhile,the Laser Raman and SEM measurements detected Fe 2 O3,SO 2 in the early fluids,indicating the early fluids were highly oxidized,the abundance of K-feldspar suggests alkalic environment.The existence of CH 4and intergrowth of molybdenite and muscovite reveals fluids were in a relative reduced environment,suggesting redox potential fluctuations and the change of pH value could lead to deposition of molybdenite.
%K Fluid inclusions
%K SEM/ED
%K Laser Raman
%K Tongkengzhang porphyry molybdenum deposit<br>流体包裹体
%K 扫面电镜/能谱
%K 激光拉曼
%K 铜坑嶂斑岩钼矿床
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=621CF755B1A341E5&jid=2013B5467E3054B1614CEC199353FCED&aid=2196949E2245EB600D3CC1C4F630F767&yid=99E9153A83D4CB11&vid=D3E34374A0D77D7F&iid=CA4FD0336C81A37A&sid=C753EB8AC8F551B9&eid=DBF54A8E2A721A6D&journal_id=1000-0569&journal_name=岩石学报&referenced_num=0&reference_num=52