| 琼东定安翰林地区晚寒武世地层的厘定及其地质意义 |
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| 引用本文： | 李孙雄,陈沐龙,云平,江宏伟,汪焰华,龚丹.琼东定安翰林地区晚寒武世地层的厘定及其地质意义[J].矿产与地质,2014(3):278-283. |
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| 作者姓名： | 李孙雄 陈沐龙 云平 江宏伟 汪焰华 龚丹 |
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| 作者单位： | 海南省地质调查院,海南海口570206 |
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| 摘 要： | 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±6Ma~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)。
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| 关 键 词： | 新建 蒙花岭组 寒武纪 海南 |
Determination of late Cambrian stratum in Hanlin area of Dingan in eastern Hainan and its geological significance |
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| LI Sun-xiong,CHEN Mu-long,YUN Ping,JIANG Hong-wei,WANG Yan-hua,GONG Dan.Determination of late Cambrian stratum in Hanlin area of Dingan in eastern Hainan and its geological significance[J].Mineral Resources and Geology,2014(3):278-283. |
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| Authors: | LI Sun-xiong CHEN Mu-long YUN Ping JIANG Hong-wei WANG Yan-hua GONG Dan |
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| Institution: | (Hainan Provincial Institute of Geological Survey, Haikou, Hainan 570206) |
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| Abstract: | 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 ）. |
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| Keywords: | newly-created Menghualing Formation Cambrian Hainan |
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