矿产与地质
礦產與地質
광산여지질
MINERAL RESOURCES AND GEOLOGY
2014年
3期
278-283
,共6页
李孙雄%陈沐龙%云平%江宏伟%汪焰华%龚丹
李孫雄%陳沐龍%雲平%江宏偉%汪燄華%龔丹
리손웅%진목룡%운평%강굉위%왕염화%공단
新建%蒙花岭组%寒武纪%海南
新建%矇花嶺組%寒武紀%海南
신건%몽화령조%한무기%해남
newly-created%Menghualing Formation%Cambrian%Hainan
蒙花岭组是新建的岩石地层单位,指定蒙花岭剖面为正层型剖面。岩性为一套高绿片岩相的变质岩,由变质石英细砂岩、各类片岩、绢云千枚岩夹细粒石英岩及数层变质基性-酸性火山岩组成。在剖面的下部第8层及上部第24层含丰富的藻类化石,地质时代为寒武纪；在剖面中部第16层变质火山岩中采人工重砂样、锆石 U-Pb 测年结果为499±6 Ma~527±48Ma,地质时代为寒武纪中晚期。故将蒙花岭组划寒武系黔东统(∈2)到芙蓉统(∈4)。
矇花嶺組是新建的巖石地層單位,指定矇花嶺剖麵為正層型剖麵。巖性為一套高綠片巖相的變質巖,由變質石英細砂巖、各類片巖、絹雲韆枚巖夾細粒石英巖及數層變質基性-痠性火山巖組成。在剖麵的下部第8層及上部第24層含豐富的藻類化石,地質時代為寒武紀；在剖麵中部第16層變質火山巖中採人工重砂樣、鋯石 U-Pb 測年結果為499±6 Ma~527±48Ma,地質時代為寒武紀中晚期。故將矇花嶺組劃寒武繫黔東統(∈2)到芙蓉統(∈4)。
몽화령조시신건적암석지층단위,지정몽화령부면위정층형부면。암성위일투고록편암상적변질암,유변질석영세사암、각류편암、견운천매암협세립석영암급수층변질기성-산성화산암조성。재부면적하부제8층급상부제24층함봉부적조류화석,지질시대위한무기；재부면중부제16층변질화산암중채인공중사양、고석 U-Pb 측년결과위499±6 Ma~527±48Ma,지질시대위한무기중만기。고장몽화령조화한무계검동통(∈2)도부용통(∈4)。
Menghualing Formation is a newly-created rock stratigraphic unit,which assigns Menghualing pro-file as the holostratotype profile.Its lithology is a set of metamorphic rock of high density greenschist facies, which is composed of metamorphic fine quartz sandstones,different schists,sericite phyllites with fine-grained quartzites and several beds of metamorphic basic-acidic volcanic rocks.In the 8th bed of inferior pro-file and 24th bed of superior profile,there are abundant alga fossil geologically aging in Cambrian.In the metavolcanite of the 1 6th bed of middle profile,artificial panned samples were collected,and the dating re-sult of acorite U-Pb is 499 ± 6 ~ 527 ± 48Ma,which means that its geologic age is middle-late Cambrian. Therefore,in this study the Menghualing Formation is divided into Cambrian Qiandong Series (∈2 )and Fu-rong Series (∈4 ).
