沉积与特提斯地质2018，Vol.38Issue(1)：62-70,9.
豫西宜洛盆地上二叠统—下三叠统泥质岩地球化学特征与物源分析
Geochemical signatures and provenance analysis of the Upper Permian to Lower Triassic argillaceous rocks in the Yiluo Basin,western Henan
摘要
Abstract
The sediment filling and evolution of the Yiluo Basin during the Late Permian to the Triassic resulted from the tectonic movement in the Qinlin orogen and the North China craton,and the provenance analysis is interpreted as one of the important tools for revealing the basin-mountain coupling processes. The geochemical signatures and provenance analysis are treated in the present paper for the Upper Permian to Lower Triassic argillaceous rocks from the Yiluo Basin,western Henan. The argillaceous rocks in the Yiluo Basin are characterized by the LREE enrichment,HREE depletion,moderate Eu anomaly and slight Ce depletion,indicating a dominant upper crust origin,with the mixtures of a small amount of ancient basement complexes in the Sunjiagou Formation. The tectonic settings of the provenances in the study area have gone through the transition from the passive continental margin (the lower member of the Sunjiagou Formation)through the active continental margin (the upper member of the Sunjiagou Formation and the Liujiagou Formation)to the continental island arc (Heshanggou Formation). The Qinlin orogen and the North China craton are believed to be the key provenances for the Yiluo Basin. The cratonic origin during the deposition of the lower member of the Sunjiagou Formation and Qinling origin after the deposition of the Tumen member of the Sunjiagou Formation in the Yiluo Basin indicate the basement uplift on the southern margin of the North China craton,and the tectonic evolution from the passive continental margin to the "arc-continent"collision and uplift of the Qinling block. The results of research in this study are helpful to the understanding of the coupling processes of the southern North China Basin and its surrounding orogenic zones.关键词
物源分析/构造背景/晚二叠世—早三叠世/宜洛盆地Key words
provenance analysis/tectonic setting/Late Permian to Early Triassic/Yiluo Basin分类
天文与地球科学引用本文复制引用
乔雨,李紫源,郑德顺,刘思聪,徐江红..豫西宜洛盆地上二叠统—下三叠统泥质岩地球化学特征与物源分析[J].沉积与特提斯地质,2018,38(1):62-70,9.基金项目
本论文由国家自然科学基金(41272118)资助 （41272118）
