华北北部侏罗-白垩过渡期陆相红层及其古地理、古生态和构造演化
投稿时间:2016-07-27  修订日期:2016-07-27  点此下载全文
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作者单位E-mail
许欢 中国地质科学院地质研究所 huanxu@ecit.cn 
柳永清 中国地质科学院地质研究所  
基金项目:国家自然科学基金项目(面上,编号:41372109, 90914003)
中文摘要:以土城子组、后城组和大青山组为代表的侏罗-白垩过渡期陆相红层在华北北部及邻区具有广泛的分布和悠久的研究历史。前人对这套陆相红层的地层序列和沉积环境、生物地层和同位素年代地层、古水流和碎屑物源、火山岩岩石地球化学、盆地构造属性和区域大地构造背景方面做了大量研究。然而,在很多问题上仍存在很大争议,包括地层时代、物源、陆相侏罗-白垩系界线、风成砂、生物群演替、基性岩墙群、大地构造背景和动力学机制。因此,在前人研究的基础上,本文选取了辽西朝阳-北票盆地、冀西北尚义盆地和大青山石拐子盆地为研究对象,通过对盆地侏罗-白垩过渡期地层、充填序列、沉积特征、古水流、碎屑组分以及侵入的基性岩墙/脉的综合研究,全面探讨了地层时代、中国陆相侏罗-白垩系界线、沉积体系、物源、古地理、古生态环境、盆地演化和大地构造属性,并提出了一些新的认识。
中文关键词:华北北部  侏罗-白垩过渡期  陆相红层  盆地  构造属性
 
Jurassic-Cretaceous Transition Terrestrial Red Beds in Northern North China and Their Regional Paleogeography, Paleoecology, and Tectonic Evolution
Abstract:The Jurassic-Cretaceous transition red beds, represented by the Tuchengzi, Houcheng and Daqingshan formations, are widespread in northern North China and adjacent regions and have a long research history. Previous workers conducted lots of studies on the stratigraphic sequence, sedimentary environment, biostratigraphy, isotopic chronostratigaphy, paleocurrent, detrital provenance, volcanic lithogeochemistry, tectonic attribute of basin and regional tectonic setting of these red beds. However, there still remains great controversial on many aspects, including stratigraphic age, provenance, terrestrial Jurassic-Cretaceous boundary, eolian sandstone, biotic transition, mafic dykes, tectonic setting and dynamic mechanism. Based on previous studies, this paper focused on stratigraphy, filling sequences, sedimentology, paleocurrent, detrital composition and intruded mafic dykes, and analyzed the age of the strata, terrestrial Jurassic-Cretaceous boundary in China, sedimentary system, provenance, paleogeography, paleoecology, paleoenvironment, basin evolution, tectonic setting, and proposed some new perspectives.
keywords:Northern North China  Jurassic-Cretaceous transition  Terrestrial red beds  Basin  Tectonic setting
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