| 哀牢山-红河左旋走滑剪切带构造抬升时间序列的裂变径迹证据 |
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| 引用本文： | 万京林 李齐. 哀牢山-红河左旋走滑剪切带构造抬升时间序列的裂变径迹证据[J]. 地震地质, 1997, 19(1): 88-90 |
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| 作者姓名： | 万京林 李齐 |
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| 作者单位： | 国家地震局地质研究所 |
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| 摘 要： | 对采自红河断裂带元阳—嘎洒段的４个片麻岩和糜棱岩样品中的磷灰石进行裂变径迹（ＦＴ）测年，得到５．６１～１０．６４Ｍａ的年龄范围。结果表明，ＲＲＦＺ段磷灰石ＦＴ年龄有从东南向西北变新的趋势。结合已有的钾长石多重扩散域（ＭＤＤ）模式结果，得到该段１５０℃至１１０℃温度范围的冷却过程（冷却速度为３．４～９．４５℃／Ｍａ）。ＦＴ结果反映的特征与南海盆地得到的１５Ｍａ时断裂带所受力的转换的结果是一致的
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| 关 键 词： | 裂变径迹 红河断裂带 左旋断层 |
FISSION TRACK EVIDENCE OF DIACHRONIC UPLIFT ALONG THE AILAO SHAN RED RIVER LEFT LATERAL STRIKE SLIP SHEAR ZONE |
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| Wan Jinglin Li Qi Chen Wenji. FISSION TRACK EVIDENCE OF DIACHRONIC UPLIFT ALONG THE AILAO SHAN RED RIVER LEFT LATERAL STRIKE SLIP SHEAR ZONE[J]. Seismology and Geology, 1997, 19(1): 88-90 |
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| Authors: | Wan Jinglin Li Qi Chen Wenji |
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| Abstract: | Fission track analyses were performed for 4 apatites. They were collected from gneiss and mylonite of Red River fault between the Yuan Yang and Gasa. The FT ages at this area were 5.61～10.64Ma. We had found that the age of FT also had a tending becoming younger from SE to NW. Using FT age combined with results of multiple diffusion domain (MDD) model of K feldspars a slow cooling process among 150～110℃ and cooling velocity of 3.4～9.5℃/Ma are obtained. The characteristic shown by results of FT is consistent with the conclusion that the faults were transtensional prior to 15.5Ma and became transpressional later |
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| Keywords: | Fission track Honghe fault zone Left lateral slip |
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