| 河南西峡二郎坪群变质岩岩石学及变质作用演化特征研究 |
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| 引用本文： | 李荣西,安三元,胡能高,叶俭.河南西峡二郎坪群变质岩岩石学及变质作用演化特征研究[J].地球科学与环境学报,1994(3). |
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| 作者姓名： | 李荣西 安三元 胡能高 叶俭 |
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| 作者单位： | 西安地质学院资源开发工程系 |
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| 摘 要： | 二郎坪群主体为一套变质火山岩，夹有少量的变泥砂岩和大理岩。普遍发生了绿片岩相一角闪岩相的变质作用。矿物共生组合及矿物世代关系表明存在两期矿物共生组合，早期以阳起石＋斜长石为代表，晚期以蓝绿色角门石＋斜长石为代表。温压测量结果表明，从早期到晚期变质反应的ＰＴ条件由低温低压向较高温高压演化。利用角闪石环带确定的ＰＴ轨迹为逆时针方向。
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| 关 键 词： | 河南西峡 二郎坪群 北秦岭裂陷 变质作用PT轨迹 |
THE METAMORPHIC PETROLOGY AND METAMORPHIC EVOLUTION OF ERLANGPING GROUP IN XIXIA COUNTY HENAN PROVINCE |
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| Li Rongxi,An Sanyuan,HuNenggao,Ye Jian.THE METAMORPHIC PETROLOGY AND METAMORPHIC EVOLUTION OF ERLANGPING GROUP IN XIXIA COUNTY HENAN PROVINCE[J].Journal of Earth Sciences and Environment,1994(3). |
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| Authors: | Li Rongxi An Sanyuan HuNenggao Ye Jian |
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| Institution: | Xi'an College of Geology |
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| Abstract: | The Erlangping Group is a metamorphic volcanic series containing silty argillaceous and carbonate rocks,which commonly underwent greenschist -amphibolite facies metamorphism. According to mineral assemblageand generation,two metamorphic mineral assemblages are recognized from Erlangping Group. One is represented by assemblage of Act pl, the other by the blue-green horblend plagioclase.Calculated PT conditions show a tendency of increase in PT. A counter-clockwise rotation PTt path is derived by using the zonedamphiboles of the amphibolites,Which suggests that the late metamorphism of Erlangping Group is a processof increasing pressure. |
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| Keywords: | Xixia Henan Erlangping group North qinling rift PT path |
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