| 北羌塘盆地油页岩形成环境及其油气地质意义 |
| |
| 引用本文： | 王剑,付修根,李忠雄,熊松.北羌塘盆地油页岩形成环境及其油气地质意义[J].沉积与特提斯地质,2010,30(3):11-17. |
| |
| 作者姓名： | 王剑 付修根 李忠雄 熊松 |
| |
| 作者单位： | 1. 成都地质矿产研究所,四川,成都,610081
2. 贵州省地质调查院,贵州,贵阳,550004 |
| |
| 基金项目： | 国家自然科学基金项目，国家油气专项"青藏高原油气资源战略选区调查与评价"项目 |
| |
| 摘 要： | 最近在北羌塘长蛇山地区新发现了晚侏罗世—早白垩世大套油页岩及巨厚膏盐层,该油页岩与近年来作者在胜利河、长梁山地区发现的多处油页岩连成一片,构成了目前我国规模最大的中生代海相油页岩带—北羌塘油页岩带。沉积岩相、古地理研究表明,晚侏罗世—早白垩世时期,北羌塘盆地总体上为一个向北西开口的相对闭塞的巨大海湾,发育了河流-三角洲、海湾(潮坪-潟湖)和浅海-陆棚等沉积相组合。古气候、古环境研究表明,油页岩(段)沉积期,胜利河地区处于潮湿的热带-亚热带环境,大量淡水的注入以及高的生产力等综合因素,控制了油页岩的形成,其分布主要位于局限海湾-潟湖的边缘带;膏盐层(段)沉积则发育于相对干旱、炎热气候条件下的闭塞环境。北羌塘晚侏罗世—早白垩世油页岩及其上覆膏盐层是重要的烃源岩和区域性封盖层。油页岩及含膏盐层沉积组合的发现,对于重新认识羌塘盆地生烃条件及保存条件,具有十分重要的意义。
|
| 关 键 词： | 北羌塘盆地 海相油页岩 沉积环境 晚侏罗世—早白垩世 |
Formation and significance of the oil shales from the North Qiantang Basin |
| |
| WANG Jian,FU Xiu-gen,LI Zhong-xiong,XIONG Song.Formation and significance of the oil shales from the North Qiantang Basin[J].Sedimentary Geology and Tethyan Geology,2010,30(3):11-17. |
| |
| Authors: | WANG Jian FU Xiu-gen LI Zhong-xiong XIONG Song |
| |
| Institution: | 1.Chengdu Institute of Geology and Mineral Resources,Chengdu 610081,Sichuan,China;2.Guizhou Institute of Geological Survey,Guiyang 550004,Guizhou,China) |
| |
| Abstract: | The thick-bedded successions of the Late Jurassic-Early Cretaceous oil shales and gypsum have been recently found in the Changsheshan area,North Qiantang Basin.These oil shales,together with those recognized in the Changliangshan and Shengli River areas,constitute the largest Mesozoic marine oil shale zone,North Qiantang oil shale zone in China.Sedimentary facies and palaeogeographic reconstruction have disclosed that during the Late Jurassic-Early Cretaceous,the North Qiantang Basin was once a giant and relatively closed gulf in which the sedimentary facies associations were developed,including the fluvial-delta,gulf（tidal flat-lagoon） and shallow sea-continental shelf facies associations.The palaeoclimatic approaches have revealed that the Shengli River area once lay in the moist tropic-subtropic zones during the deposition of the oil shales.The injection recharge of plentiful fresh water and high productivity are considered as the controlling factors for the formation of the oil shales.The oil shales were dominantly aligned around the restricted gulf-lagoon areas,whereas the gypsum beds occurred in the closed environments under the xerothermic climatic conditions.The Late Jurassic-Early Cretaceous oil shales and their overlying gypsum beds are interpreted as the important source rocks and regional seal rocks in the North Qiantang Basin.The discovery of the oil shale-gypsum sedimentary associations is of important implications for the improvement of our knowledge of the hydrocarbon accumulation and preservation in the whole Qiangtang Basin. |
| |
| Keywords: | North Qiantang Basin marine oil shale sedimentary environment Late Jurassic-Early Cretaceous |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《沉积与特提斯地质》浏览原始摘要信息 |
| 点击此处可从《沉积与特提斯地质》下载免费的PDF全文 |
|
