新疆阿尔泰铁热克提岩体热历史的磷灰石裂变径迹法研究 |
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引用本文:袁万明,董金泉,汤云晖,保增宽.2004.新疆阿尔泰铁热克提岩体热历史的磷灰石裂变径迹法研究[J].地球学报,25(2):199-204. |
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基金项目:国家重点基础研究发展规划项目(编号:2001CB409804),国家自然科学基金项目(编号:10175076和40072068) |
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中文摘要:通过对新疆阿尔泰铁热克提岩体4个磷灰石裂变径迹样品分析研究表明,具有3个阶段的热演化模式:①大约120Ma之前,温度为105~130℃或90~120℃,属于较高温稳定期;②60~120Ma,温度为90~120℃或20~65℃,系快速冷却与隆升期;③60Ma以来为20~65℃或12~18℃,属低温稳定期。第2阶段(60~90Ma期间),冷却速率为2.5~3.23℃/Ma,相当于抬升速率为83.3~107.7m/Ma。60~120Ma的快速隆升作用以及80.4~91.9Ma的裂变径迹年龄,证实燕山晚期发生过新的陆内挤压造山活动。 |
中文关键词:地质热历史 隆升与剥蚀 裂变径迹 磷灰石 新疆阿尔泰 |
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Thermal History of the Tiereketi Batholith in Altay Mountains, Northern Xinjiang:Evidence from Apatite Fission Track Analysis |
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Abstract:Fission track analysies of 4 apatite samples from Tiereketi granite batholith in the Altay Mountains of northern Xinjiang show three stages of thermal history. Before 120 Ma,the temperatures were 105~130℃ to 90~120 ℃;during 60~120 Ma,the temperatures ranged from 90~120 ℃to 20~65 ℃;since 60 Ma,the temperatures have varied in the range of 20~65 ℃ to 12~18 ℃.The 60~90 Ma period was a rapid cooling and uplifting stage,with the cooling rate being 2.5~3.23 ℃/Ma and uplifting rate 3.3~107.7 m/Ma. The rapid uplift during the 60~120 Ma and the apatite fission track ages of 80.4~91.9 Ma indicate that there once existed an intracontinental compressional orogeny in about 60~120 Ma. |
keywords:thermal history uplift and denudation fission track apatite Altay Mountains in Xinjiang |
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