...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Chinese science bulletin >The evidence of fission-track data for the study of tectonic thermal history in Qinshui Basin
【24h】

The evidence of fission-track data for the study of tectonic thermal history in Qinshui Basin

机译：沁水盆地构造热史研究的裂变径迹证据

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The thermal history of the Qinshui Basin has been studied by using the fission-track analysis of apatite and zircon, integrated analysis of tectonic evolution, magmatic activity and other palaeogeothermal analysis data. Results indicate that the palaeogeothermal gradient between the late-Paleozoic era and the medium-Mesozoic era is relatively low and the palaeogeothermal gradient in the late-Mesozoic is up to 5.56℃/100 m in the middle, and the values are relatively higher in the north and south margins of the basin, reaching over 8.00℃/100 m, which indicates that there was an anomalous tectonic thermal event in the thermal history of Qinshui Basin. This event happened in 110-140 Ma, and the main peak value was between 120 and 140 Ma. This anomalous tectonic thermal event is controlled by the strengthening thermal mobility of the lithosphere and magmatic intrusion. The maturity of the Permo-Carboniferous coal series mainly was controlled by this anomalous thermal field. The apatite fission track date of samples across the basin shows that a rapid tectonic uplifting with cooling existed 26.2-11.5 Ma ago and the upliftings in the north and south of the basin happened earlier than that in the middle. The Permo-Carboniferous strata had been completely annealed in the early 50 Ma, palaeotemperature over 125℃. Since then, especially from Oligocene-Miocene epoch, the strata which experienced large-scale tectonic upliftings with rapid cooling have been kept out of the annealing belt (70-125℃) in a relative low temperature environment. The late Mesozoic tectonic thermal event control hydrocarbon production peak (late Jurassic to early Cretaceous period) of Permo-Carboniferous strata in Qinshui Basin. When the strata experienced upliftings with rapid cooling since Oligocene-Miocene epoch, the hydrocarbon generation of coal series had stopped.
机译：利用磷灰石和锆石的裂变径迹分析，构造演化，岩浆活动和其他古地热分析数据，对沁水盆地的热史进行了研究。结果表明，晚古生代至中中生代之间的古地热梯度较低，中生代后期的古地热梯度中部最高为5.56℃/ 100 m，而在中古时代则较高。盆地南北缘达到8.00℃/ 100 m以上，说明沁水盆地的热史中存在异常的构造热事件。此事件发生在110-140 Ma，主要峰值在120和140 Ma之间。这种异常的构造热事件是由岩石圈热活动性增强和岩浆侵入控制的。二叠纪-石炭系煤的成熟度主要受此异常热场控制。整个盆地样品的磷灰石裂变径迹日期表明，在冷却之前，存在一个快速的构造隆升伴随着冷却，时间为26.2-11.5 Ma，盆地北部和南部的隆起发生于中部。二叠纪—石炭纪地层在古玛温度超过125℃的50 Ma早期已完全退火。从那以后，特别是渐新世-中新世时期，经历了大面积构造抬升和快速冷却的地层一直在相对低温的环境下（70-125℃）被排除在退火带之外。沁水盆地二叠纪—石炭系地层的中生代晚期构造热事件控制了油气产量峰值（侏罗纪至白垩纪早期）。自渐新世-中新世以来，当地层经历快速冷却的隆升时，煤系烃的生成就停止了。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号