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吐鲁番-哈密盆地中新生代热历史:磷灰石裂变径迹证据 被引量:15

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摘要 对吐鲁番 哈密盆地中部连木沁剖面和南北山前带的 9个样品进行磷灰石裂变径迹测年发现 ,7个侏罗系样品的中心年龄皆小于地层沉积年龄 ,而 2个白垩系样品的中心年龄则大于或等于地层沉积年龄 ,表明侏罗系样品经历过退火或部分退火 ,而白垩系样品则未退火 .进一步的热模拟研究表明 ,在晚白垩世 12 0~ 10 0Ma ,吐哈盆地发生构造抬升 ,地层快速冷却剥露 ,岩层在新生代二次埋藏加热 ,至 10~ 8Ma又再次剥露 .
出处 《自然科学进展》 北大核心 2004年第10期1194-1198,共5页
基金 国家"九七三"西部项目(编号:2001CB409804) 国家自然科学基金(批准号:40173001)资助项目
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