| 陕南东沟坝地区中酸性海相火山岩的变质作用 |
| |
| 引用本文： | 杨荣兴.陕南东沟坝地区中酸性海相火山岩的变质作用[J].桂林工学院学报,1993(1). |
| |
| 作者姓名： | 杨荣兴 |
| |
| 作者单位： | 桂林冶金地质学院地质矿产勘查系 |
| |
| 摘 要： | 东沟坝地区位于陕南“勉略阳三角地带”北缘。出露地层为中上元古界碧口群上部的一套浅变质中酸性海相火山岩系。主要共生矿物组合有绿纤石+绿泥石+阳起石+绿帘石+钠长石(士绢云母);钠长石+阳起石+绿帘石+绿泥石+绢云母。变质相达到绿纤石-阳起石相至低温绿片岩相。变质作用过程可分为4个阶段。高峰变质期与韧性剪切变形关系密切。
|
| 关 键 词： | 火山岩 变质作用 变质相 东沟坝 陕西 |
METAMORPHISM OF MARINE FACIES VOLCANIC ROCKS IN THE DONGGOUBA AREA,SOUTHERN SHANXI |
| |
| Yang Rongxing.METAMORPHISM OF MARINE FACIES VOLCANIC ROCKS IN THE DONGGOUBA AREA,SOUTHERN SHANXI[J].Journal of Guilin University of Technology,1993(1). |
| |
| Authors: | Yang Rongxing |
| |
| Affiliation: | Yang Rongxing Department of Exploration Geology,Guilin College of Geology |
| |
| Abstract: | The Donggouba area lies on the north rim of "Mian-Lue-Yang trigonalgeological zone" in southern Shanxi. The strata are a suit of low-grademetamorphic volcanic rock series of marine facies eruption and belongto the Mid-Upper Proterozoic Bikou Group. The metamorphism hasgone through the pumpellyite-actinolite facies to the low-temperaturegreenschist facies. The characteristic metamorphic mineral associations arepumpellyite+chlorite+actinolite+epidote+albite+quartz(+sericite);chlorite+ericite+albite+quartz (+calcite); albite+actinolite+epidote+chlorite+sericite+quartz.The metamorphism process can be divided into fourstages. The peak metamorphism stage is closely related to the ductile sheerdeformation-metamorphism. |
| |
| Keywords: | volcanic rocks metamorphism metamorphic facies Donggouba Shanxi |
| 本文献已被 CNKI 等数据库收录！ |
