华北克拉通中元古代下马岭组地质特征及研究进展——下马岭组研究百年回眸  

Geological Features and Research Progress of the Mesoproterozoic Xiamaling Formation in the North China Craton:a Review after Nearly One Hundred Years of Study

作　　者：范文博[1,2] 

机构地区：[1]中国科学院地质与地球物理研究所岩石圈演化国家重点实验室,北京100029 [2]中国科学院大学,北京100049

出　　处：《地质论评》2015年第6期1383-1406,共24页Geological Review

基　　金：国家重点基础研究发展计划973项目(编号2012CB416601)的成果

摘　　要：从1920年叶良辅在北京西山命名"下马岭页岩"到现在的近百年时间里,下马岭组研究取得了诸多进展。本文从岩性组成、沉积序列及环境、分布范围及区域变化、年代地层学、古生物学、含油气性、古海洋演化、基性岩床、盆地性质及演化等多个视角,对下马岭组的地质特征及相关地质、科学问题进行了总结与分析。这有利于我们对下马岭组及其内涵更为全面、细致、深刻的了解,也为探索华北乃至整个地球中元古代时期的演化提供更多信息。The Xiamaling Formation study has progressed much since it was firstly named as Xiamaling Shale in Western Hills,Beijing,in 1920. The Formation is reviewed here from different perspectives after nearly one hundred years,including its lithology,stratigraphic succesion,sedimentary environment,regional differences,chronostratigraphy,palaeontology,oil / gas possibility,diabase sills in it,its significance for paleoceanic evolution,basin type and also evolution. Thus we could have a more comprehensive,detailed and profound understanding of the formation and its significance for the evolution of both North China and the Earth in the Proterozoic. The Zhaojiashan section,together with the suggested Xiahuayuan standard section,are described carefully for its lithological variation and sedimentary environment evolution. The boundary of each member are also further modified and defined. Contrasting of the 4 important sections,toghther with the other 10 sections and the marginal deposition in the North China Craton,outline the remaining basin and their vertical similarities and also differences for the formation. The 4 memmbers of the formation are comparable,although the upper part may be eroded after deposition and the thickness of the succesion can be variable because of possible lateral facies change. The biotic found and its chronological study advancement are also summarized. The study focuses concerning the formation are reviewed,including:( 1) their organic content and corresponding hydrocarbon generating potential,( 2) evidence for the ocean redox structure in the Mesoproterozoic,( 3) the extensive basic sills and their tectonic significance,and( 4) indication for the basin type and evolution of the so-called Yanliao aulacogen. We conclude the formation should be further studied for its basic geological aspects firstly. Its high-resolution stratigraphic correlation,chronostratigraphic framework improvement,origin of the rhythm and provenance analyses can also be done in the future. Other stratigraphic segments and l

关 键 词：下马岭组 中元古代 华北 赵家山 下花园 

分 类 号：P534.3[天文地球—古生物学与地层学]