华北、扬子板块碰撞后热演化史的初步研究 |
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引用本文: | 李齐,陈文寄,马宝林,王清晨,孙敏. 华北、扬子板块碰撞后热演化史的初步研究[J]. 地震地质, 1995, 17(3): 193-203 |
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作者姓名: | 李齐 陈文寄 马宝林 王清晨 孙敏 |
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作者单位: | 国家地震局地质研究所,中国科学院地质研究所,香港大学地球科学系 |
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摘 要: | 对采自苏北-胶南-大别高压变质构造混杂岩带的片麻岩、糜棱岩和郯庐断裂带上的片麻岩中9个钾长石进行了 ̄40Ar- ̄39Ar年龄测定和多重扩散域(MDD)模式处理,9个样品的热演化史表明上述地区存在5个不同的快速冷却时段,并就其可能的构造含义,提出了华北与扬子板块碰撞后的折返历史过程
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关 键 词: | 变质带 热历史 地质年代测定 MDD模式 |
THERMAL EVOLUTION HLSTORY AFTER COLLISION OF NORTH CHINA PLATE WITH YANGTZE PLATE |
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Abstract: | 40 Ar-39Ar analyses and MDD(multiple diffusion domain)model treatements were performed for 9 K-feldspar samples.They were collected from gneiss and mylonite of North Jiangsu-Jiaonan-Dabie tectonic melange belt and Tancheng-Lujiang fault zone.The thermal evolution history exhibits five fast ccoling stages found in these samples.In relation with their possible tectonic implications a recovery process after the collision of the North China plate with the Yangtze plate is suggested here |
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Keywords: | Metamorphic belt Themal history Geological Geological age determina-tion MDD moddel |
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