| 河南西峡石界河群的变质作用特征及演化 |
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| 引用本文： | 李荣西,安三元,胡能高,叶俭.河南西峡石界河群的变质作用特征及演化[J].地球科学与环境学报,1994(2). |
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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： | 西安地质学院岩石研究室 |
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| 摘 要： | 从原二朗坪群中解体出来的石界河群主要为一套泥砂质沉积建造。根据矿物世代关系及矿物共生组合，可划分出绿泥石－黑云母带、石榴石带、十字石－红柱石带和红柱石－堇青石带四个变质带，其变质作用属低压相系，变质过程中温压演化趋势和变质作用ＰＴｔ轨迹综合研究表明石界河群因秦岭群向北逆冲而被掩埋，在深部发生热松弛而升温，之后又因构造隆起和侵蚀，压力明显下降，但温度则继续保持了一段时间。
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| 关 键 词： | 石界河群 变质作用演化 PTt轨迹 |
THE METAMORPHIC EVOLUTION OF THE UPPER PALEOZOIC SHIJIEHE GROUP IN THE XIXIA AREA,HENAN PROVINCE |
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| Li Rongxi, An Sanyuan, Hu Nenggao, Ye Jian.THE METAMORPHIC EVOLUTION OF THE UPPER PALEOZOIC SHIJIEHE GROUP IN THE XIXIA AREA,HENAN PROVINCE[J].Journal of Earth Sciences and Environment,1994(2). |
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| Authors: | Li Rongxi An Sanyuan Hu Nenggao Ye Jian |
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| Institution: | Xi'an College of Geology |
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| Abstract: | The Shijiehe group is composed of mica-schist and quartz-schist with metamorphic conglomerate, whose protolith formation is silt sediment. According to the mineral generation and assembrage, four progressive mineral zones are divided. From low to nigh grade, they are termed Ch-bio zone, Gi zone, And-stau zone and And-cord zone. Mineral assembrage and P-T conditioms indicate a low pressure metamorphic series. The tendency of the P-T evolution and PTt path suggest that the upper paleozoic Shijiehe group uplift resulted in part form erosion and tectonism. |
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| Keywords: | Shijiehe group metamorpnic evolution PTt path |
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