首页 | 本学科首页   官方微博 | 高级检索  
     

贵州瓮安陡山沱组含磷岩系沉积序列及磷块岩的形成
引用本文:密文天,林丽,马叶情,王新利,任才云,周玉华. 贵州瓮安陡山沱组含磷岩系沉积序列及磷块岩的形成[J]. 沉积与特提斯地质, 2010, 30(3): 46-52
作者姓名:密文天  林丽  马叶情  王新利  任才云  周玉华
作者单位:1. 成都理工大学,沉积地质研究院,四川,成都,610059
2. 鑫达金银开发中心,北京,100054
3. 贵州瓮福磷矿,贵州,福泉,550508
基金项目:国家自然科学基金项目,教育部"高等学校博士学科点专项科研基金",中石化海相油气勘探前瞻性项目,贵州瓮福大信北斗山磷矿项目联合资助 
摘    要:贵州瓮安陡山沱组磷块岩为碳酸盐岩型含磷岩系,属于浅海碳酸盐岩台地沉积区。对瓮安磷矿大塘剖面进行沉积环境研究,将Marinoan冰期后沉积的陡山沱组地层分为6个向上变浅的沉积序列。瓮安含磷岩系大部分为多旋回的叠置体,其常见的交错层理、波状层理、透镜状层理等表明了磷块岩形成于水体较浅的高能环境。南沱冰期后,陡山沱期剧烈的海侵作用引发上升洋流,携带富磷海水涌入浅水区,在海平面间歇性波动的条件下,为磷块岩的形成提供了物源与动力条件。

关 键 词:贵州  瓮安  陡山沱组  磷块岩  沉积序列

Depositional sequences of the phosphatic rock series and formation of the phosphorites in the Doushantuo Formation in Weng'an,Guizhou
MI Wen-tian,LIN Li,MA Ye-qing,WANG Xin-li,REN Cai-yun,ZHOU Yu-hua. Depositional sequences of the phosphatic rock series and formation of the phosphorites in the Doushantuo Formation in Weng'an,Guizhou[J]. Sedimentary Geology and Tethyan Geology, 2010, 30(3): 46-52
Authors:MI Wen-tian  LIN Li  MA Ye-qing  WANG Xin-li  REN Cai-yun  ZHOU Yu-hua
Affiliation:1.Institute of Sedimentary Geology,Chengdu University of Technology,Chengdu 610059,Sichuan,China;2.Xinda Gold-Silver Development Center,Beijing 100054,China;3.Weng'an-Fuquan Phosphorus Mine Company,Fuquan 550508,Guizhou,China)
Abstract:The phosphorites in Weng'an,Guizhou are hosted in the lower and upper parts of the Doushantuo Formation,and made up of carbonate rock-type phosphatic rock series on a shallow marine carbonate platform.The strata of the Doushantuo Formation deposited after the Marinoan glacial period may be grouped into six shallowing-upward depositional sequences.The bulk of phosphatic rock series is built up of polycyclic stacking deposits in which cross-bedding,wavy bedding and lenticular bedding are common,implying that the phosphorites rested in the shallow marine high-energy environments.From the Nantuoan glacial period onwards,the large-scale transgressions gave rise to the upwelling oceanic currents and carried plentiful phosphatic sea water into the shallow marine areas as sites of phosphorites development.The repeated sea-level fluctuations contributed to the phosphatic source and development of polycyclic depositional sequences of the phosphorites.
Keywords:Guizhou  Weng'an  Doushantuo Formation  phosphorite  depositional sequence
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
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号