雅布赖盆地萨尔台凹陷中—新生代构造热事件的磷灰石裂变径迹分析

来源期刊:中南大学学报(自然科学版)2015年第8期

论文作者:任战利 田涛 吴晓青 马国福 张睿胜 杨智明 王维 王锦

文章页码:2974 - 2983

关键词:磷灰石裂变径迹;中—新生代;构造热事件;萨尔台凹陷;雅布赖盆地

Key words:apatite fission track; Meso-cenozoic; tectonic-thermal history; Sartai depression; Yabrai Basin

摘    要:运用磷灰石裂变径迹(AFT)分析方法,探讨分析雅布赖盆地萨尔台凹陷中—新生代构造热事件发生的径迹年龄(AFTA)和长度(AFTL)分布特征,并通过反演法建立热史模型,恢复构造热演化过程。研究结果表明:研究区可能至少经历了3期隆升过程,分别发生在晚侏罗世末期((138.0±10)~135.8 Ma)、早白垩世晚期((116.0±8)~109.3 Ma)和古近纪中晚期(52.0~29.4 Ma)。在时间演化上,新河组下段(J2x1)地层在盐场次凹和小湖子次凹具有相似性,但后者地层温度普遍高于前者,尤其在早白垩世,拥有更利于油气生成的地温环境。发生在180.0~146.7 Ma和130.5~100.0 Ma期间的2次增温过程与烃源岩热演化关系密切,地层温度可加热至72.0~135.0 ℃,是影响油气生成的关键阶段。构造热演化过程的研究为雅布赖盆地萨尔台凹陷的石油、天然气等矿产资源的勘探提供了新的约束条件。

Abstract: The characteristics of apatite fission track age (AFTA) and length (AFTL) data of the Meso-cenozoic tectonic-thermal history of Sartai depression of Yabrai basin were revealed by apatite fission track analysis. And the thermal history model was established by inversion method to recover the tectonic-thermal evolution. The results show that the study area may have experienced three times of uplift process at least which occurred in the end of Jurassic ((138.0±10)-135.8 Ma), late stage of Early Cretaceous ((116.0±8)-109.3 Ma) and middle-late Paleogene (52.0-29.4 Ma). The J2x1 strata in Yanchang sub-sag and Xiaohuzi sub-sag have the similar thermal evolution process in time, but the temperature of J2x1 in Xiaohuzi sub-sag is generally higher than that in Xiaohuzi sub-sag, especially in the Early Cretaceous when Xiaohuzi sub-sag had a much better geothermal field environment for hydrocarbon generation. The temperature of J2x1 heats up to 72.0-135.0 ℃ during 180.0-146.7 Ma and 130.5-100.0 Ma, and the two warming processes are the crucial stages of the source rock’s maturity evolution and hydrocarbon generation in study area. The study of tectonic-thermal history can provide some new constraints on oil-gas and other mineral exploration in Yabrai Basin.

相关论文

  • 暂无!

相关知识点

  • 暂无!

有色金属在线官网  |   会议  |   在线投稿  |   购买纸书  |   科技图书馆

中南大学出版社 技术支持 版权声明   电话:0731-88830515 88830516   传真:0731-88710482   Email:administrator@cnnmol.com

互联网出版许可证:(署)网出证(京)字第342号   京ICP备17050991号-6      京公网安备11010802042557号