川东北地区构造-热演化探讨——来自(U-Th)/He年龄和Ro的约束

被引：61

作者：

邱楠生 ^{[1
]}

秦建中 ^{[2
]}

Brent I A McInnes ^{[3
]}

王杰 ^{[2
]}

腾格尔 ^{[2
]}

郑伦举 ^{[2
]}

机构：

[1] 油气资源与探测国家重点实验室(中国石油大学(北京))

[2] 中国石油化工股份有限公司石油勘探开发研究院无锡石油地质研究所

[3] CSIRO,Bentley W A

来源：

高校地质学报 | 2008年 / 02期

关键词：

构造-热演化; (U-Th)/He年龄; 镜质组反射率; 川东北地区;

D O I：

10.16108/j.issn1006-7493.2008.02.013

中图分类号：

P618.13 [石油、天然气];

学科分类号：

摘要：

利用镜质组反射率和磷灰石与锆石的(U-Th)/He年龄一起模拟了川东北地区三叠纪以来的构造-热演化特征。结果表明早三叠世的热流值在51～66mW/m2,自晚三叠世至白垩纪随盆地性质由前陆盆地演化为陆内坳陷盆地,热流缓慢降低直至现今的44.5mW/m2。但在晚白垩世—古新世时期受燕山晚期构造运动的影响,热流有一个微弱增高的现象。同时,磷灰石和锆石的He年龄揭示了川东北地区大致在晚白垩世期间开始隆升且抬升剥蚀量较大。因此,磷灰石和锆石的(U-Th)/He年龄可以揭示后期详细的冷却历史。

引用

页码：223 / 230

页数：8

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