_大河边一新晃超大型重晶石矿床地球化学特征及形成的地质背景39;.pdfVIP

2o02／O18(02)一024756 ActaPetrologicaSinica 岩石学报 大河边一新晃超大型重晶石矿床地球化学特征 及形成的地质背景’ 方维董 胡瑞忠 苏文超 泽亮 肖加飞 蔫国豪 FANGWeiXuan“，HURuiZhong，SUWenC．hao，QILiang，XIA0JiaFeiandJIANGGuoHao 1．中国科学院地球化学研究所矿床地球化学开放研究实验室．贵阳 550002 2．有色金属矿产地质调查中心 北京 100814 1．LaboratoryofOreDepositGeod~mistry，InstituteofGeochemL~try，ChineseAcademyofSciences．Guiy~g550002tChina2 TheMin~aland GeologicalExpiorqti~ Centerof N。n{￡… Metals，Belynig 10{1814 稿 ，200111—15改回． FangWX—HuRZtSuWC．QiL—XiaoJFandJiangGH．2002 GeochemicalcharacteristicsofDahebian—Gongxisuperiarg~ baritedepositsandanalysison itsbackgroundoftectonicgeology China．ActaPetrologicaSinica，18(2)：247— 256 Abstract TheDahebianGongxisuperlargeBaritedepositslocated inthesouthernmargin oftheYangtzemassifarethe firstworld—classbaritedeposits．Chinaisthelargestproducerofbariteandhasthelargestbariteorereserves．Thepotential reservesofbarite0res (470×10 tons)intheDahebian—Gongxibariteorefieldismorethantotalbariteorereservesofother countries (326× 10 tons intheworld．W hydidthisnonconventionalsuperlargebaritedepositoccurin thisarea?This scientificquestion isworthwhiletobeprobed into．From theview ofmineral—petrology，geochemistryandanalysisof hydrothermalbasin，geologicalandgeochemicalcharacteristicsandenvironmentsofhydrothermaldeposition forbariteores and related rockshave beendiscussedin thispaper Firstly．thethirdorder，faultcontrolledbasin mayprobablyprovide enoughorehostedspaceforthesuperlargebaritedeposits TheTianzhuXinhuang—YupingCambriansedimentarybasinswith hydrothermaldeposition at Largescare occurred on the continentalslope were probably the kind offauh—controlled sedimentarybasinwith hydrotherma[deposition Duetosnysedimentaryfaulting．theTianzhu—Xinhuang—Yuping Cambrian sedimentarybasinsweremostlikelycutintoaseriesofsub basins TheDahebian BilinandLongbei—Tongpengaithird—order basinswerethetectonicallytocatedspacecoupledwithore—hostedspaceproducedbythesyn faultingatthesametimeforthe superlarge ba