南祁连盆地哈拉湖坳陷中二叠世早期气候变化与物源分析  

Climate Change and Source Analysis of Early Middle Permian in Halahu Depression of South Qilian Basin

作　　者：姚建国 郭旭 赵存良 徐子微 刘世明 YAO Jianguo;GUO Xu;ZHAO Cunliang;XU Ziwei;LIU Shiming(School of Earth Science and Engineering,Hebei University of Engineering,Handan 056038,China;Key Laboratory of Resource Exploration Research of Hebei Province,Handan 056038,China)

机构地区：[1]河北工程大学地球科学与工程学院,河北邯郸056038 [2]河北省资源勘测研究重点实验室,河北邯郸056038

出　　处：《煤炭技术》2024年第6期140-145,共6页Coal Technology

基　　金：河北省教育厅基础研究重点培育专项(JZX2023010);河北省自然科学基金(D2021402004)。

摘　　要：采用沉积岩石学、元素地球化学等方法对南祁连盆地哈拉湖坳陷中二叠世沉积环境演化进行了分析。研究样品来自盆地内天页2井岩芯样品,深度379.0~418.48m,对样品进行主微量元素数据分析,以Sr/Cu值、MgO/CaO值、Al_(2)O_(3)/MgO值、SiO_(2)/Al_(2)O_(3)值、CIA值、黏土矿物含量指标为依据,分析哈拉湖地区中二叠世气候变化;以稀土元素指标分析哈拉湖地区中二叠世的物质来源。结果表明,哈拉湖地区中二叠世早期处于温暖湿润的气候环境下,沉积物质来源于活动大陆边缘的玄武岩。Analyzes the evolution of the Middle Permian sedimentary environment in the Halahu Depression of the South Qilian basin using methods such as sedimentary petrology and elemental geochemistry.The research samples are from the core samples of Tianye 2 well in the basin,with depths ranging from 379.0 m to 418.48 m.The main and trace element data of the samples were analyzed based on Sr/Cu values,MgO/CaO values,Al_(2)O_(3)/MgO values,SiO_(2)/Al2O_(3)values,CIA values,and clay mineral content indicators.The climate change in the Halahu region during the Middle Permian was analyzed;Analyze the material sources of the Middle Permian in the Halahu area using rare earth element indicators.The results indicate that the Halahu area was in a warm and humid climate environment in the early Middle Permian,and the sediment source was basalt from the active continental margin.

关 键 词：中二叠世 哈拉湖坳陷 古气候 物源分析 

分 类 号：P618[天文地球—矿床学]