鄂尔多斯盆地北部二叠系多碎屑重矿物物源示踪及构造古地理意义
结题报告
批准号:
42002123
项目类别:
青年科学基金项目
资助金额:
24.0 万元
负责人:
曹海洋
依托单位:
学科分类:
沉积学和盆地动力学
结题年份:
2023
批准年份:
2020
项目状态:
已结题
项目参与者:
曹海洋
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中文摘要
古亚洲洋东段晚古生代的闭合过程及相关造山带演化对东亚古地理重建至关重要。由于其形成的多期岩浆岩和变质岩被后期改造得极为复杂,目前对于该俯冲-闭合造山过程尚存在不同认识。沉积岩中的碎屑金红石和独居石具有相对较低封闭温度,是近几年发展起来的新的单矿物物源分析对象。联合较高封闭温度的碎屑锆石,能为物源分析提供更为丰富而准确的源区信息。鄂尔多斯盆地北部府谷剖面发育连续的二叠系地层,锆石物源分析显示该剖面的地层很好地记录了北缘造山带的物源输入。本申请拟通过独居石、金红石及锆石等多种碎屑重矿物的U-Pb年代学和微量元素分析,结合府谷剖面的沉积相和砂岩碎屑组分变化等,从沉积记录角度完善古亚洲洋东段晚古生代复杂的闭合过程及多期岩浆-变质事件的认识,揭示造山带源区剥露过程和盆地充填响应的联系,探索盆地充填与古亚洲洋闭合的耦合关系,为重建中亚造山带东段与华北板块的构造古地理关系提供新的约束。
英文摘要
The late Paleozoic closure process and related orogenic belt evolution of the eastern part of the Paleo-Asian Ocean are playing a vital role in the East Asia paleogeographic reconstruction. Due to the complexity of the multistage magmatic and metamorphic rocks late reformation, the different understandings of orogenic processes are still existed. Detrital rutile and monazite heavy minerals in sedimentary rocks have relatively low sealing temperature, and it has been developed as new single mineral objectsfor provenance analysis in recent years. The detrital zircons combined with higher confining temperatures can provide more abundance and accurate source information for provenance analysis. The continuous Permian strata are developed in the Fugu section in the northern Ordos basin. The zircon provenance analysis shows that the strata in this section have well recorded provenance input of orogenic belt in the northern margin. In this study, sedimentology and petrology analysis combined with the detrital monazite,detrital rutile and zircon U-Pb chronology and microelement analysis combined with the will be used to reconstruct the closing progresses of Paleo-Asian Ocean and to obtain new understanding of multistage magma-metamorphic events. The research will reveal the relationship of exhumation processes in the orogenic belt and the basin filling, it will provide new constraints for tectonic paleogeographic relationships of eastern central Asian orogenic belt and north China plate, and it will help to explore the relationship between basin filling and Paleo-Asian closing.
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DOI:10.1016/j.marpetgeo.2022.105813
发表时间:2022-09
期刊:Marine and Petroleum Geology
影响因子:4.2
作者:Haiyang Cao;Siding Jin;Mingcai Hou;Si Chen;Yan Liu;A. Chen
通讯作者:Haiyang Cao;Siding Jin;Mingcai Hou;Si Chen;Yan Liu;A. Chen
DOI:10.1029/2023gc011127
发表时间:2024-01
期刊:Geochemistry
影响因子:3.7
作者:Siding Jin;Haiyang Cao;Mingcai Hou;Jiawei Wang;Chao Ma;Yu Liu
通讯作者:Siding Jin;Haiyang Cao;Mingcai Hou;Jiawei Wang;Chao Ma;Yu Liu
DOI:10.1016/j.petsci.2023.03.021
发表时间:2023-03
期刊:Petroleum Science
影响因子:5.6
作者:Jian Luo;Haiyang Cao;D. Chiarella;Rulin Miao;T. Ye;Yunlong Xu;A. Chen;Xiaoping Luo
通讯作者:Jian Luo;Haiyang Cao;D. Chiarella;Rulin Miao;T. Ye;Yunlong Xu;A. Chen;Xiaoping Luo
国内基金
海外基金