<正>GEOTECTONICBACKGROUNDOFPYROPHYLLITEMINERALIZATIONANDORE-BEARINGVOLCANICFORMATIONINSOUTHEASTERNCOASTALAREAS,CHINAWangLing(ChangshaInstituteofGeotectonics,AcademiaSinica,Changsha,410013,Hunan,China)LiuDongshen(GeologicInstitute,NationalConstructionMaterialIndustryBureau,100010,Beijing,China)pyrophyllite,Diwastructure,nonmetallicmetailogeny,ore-bearingforma-tion,theSountheasternCoastalAreas,ChinaThevolcanicgas-liguidtypeofpyrophyllitedepositsintheSoutheasternCoastalareas,Chinaaretheproductoftectono-magama-volcanisminDiwaregions.Thepyro-phylliteore-bearingvolcanicformationwereformedinthemaximum-mobilityperiodofDiwa,whicharemainlytheLateJurassicstrataandaresecondlytheEarlyCretaceousvolcanic-sedi-mentaryrockseriesstrata.Thelithologyofthehostrockismainlyrhyoliticcrystal-vitrictuff,andthechemicalcompositionischaracterizedbyhighsiliconrichalumiumandlowiron,be-longingtothea
