加入收藏 设为首页 联系我们
网站首页 | 期刊介绍 | 投稿指南 | 过刊浏览 | 在线订阅 | 留言板 | 联系我们
樊海龙,彭传凯,余心起,陈晶源,李江涛,乔东海,郭建明,许世阳.新疆乌苏泥火山地球化学特征及其泥浆源[J].地质通报,2017,(8):1428-1438.
新疆乌苏泥火山地球化学特征及其泥浆源    点此下载全文
樊海龙1  2  3  彭传凯4  余心起3  陈晶源3  李江涛5  乔东海3  郭建明1  许世阳1  2
1. 甘肃省油气资源研究重点实验室/中国科学院油气资源研究重点实验室, 甘肃 兰州 730000;
2. 中国科学院大学, 北京 100049;
3. 中国地质大学(北京)
地球科学与资源学院, 北京 100083;
4. 新疆维吾尔自治区地质矿产勘查开发局第七地质大队, 新疆 乌苏 833000;
5. 新疆维吾尔自治区地质矿产勘查开发局第八地质大队, 新疆 阿克苏 843000
基金项目:中国地质调查局项目《天山成矿带境内外构造背景与成矿环境对比研究》(编号:12120114006201)
DOI:
摘要:
      泥火山是地质流体活动的结果,喷发需具备泥浆源、泥浆运移通道和水补给3个条件。对乌苏泥火山8个喷口泥浆进行岩石地球化学分析,轻稀土元素富集,重稀土元素亏损,轻、重稀土元素平均比值为6.81,泥浆中富集大离子亲石元素Ba、Rb等,高场强元素Nb、Ta强烈亏损,Th弱亏损,(La/Yb)N值为5.47,Ce/La值为2.22,球粒陨石标准异常值δEu显示中等负异常(0.760~0.805);Sr/Ba值为0.33~1.01(平均值0.60),表明源岩为陆相沉积且古盐度较低,Ce/La(2.22)、Ceanom(-0.007)、V/(V+Ni)(0.78)值均指示源岩形成于还原环境。稀土、微量元素分析及地层对比分析表明,乌苏泥火山源岩来自于下侏罗统八道湾组、三工河组,为河流沼泽相-半深湖相含煤地层代表的弱还原-还原沉积环境,源岩的最大埋藏深度为7~8km。泥火山源岩的研究为指示油页岩、烃类物质的位置提供了证据。
关键词:泥火山  地球化学  侏罗纪  页岩  源岩地层  还原环境  新疆乌苏
Geochemical characteristics of Wusu mud volca-noes in Xinjiang and their mud sources    Download Fulltext
FAN Hailong1  2  3  PENG Chuankai4  YU Xinqi3  CHEN Jingyuan3  LI Jiangtao5  QIAO Donghai3  GUO Jianming1  XU Shiyang1  2
1. Key Laboratory of Petroleum Resources, Gansu Province/Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou 730000, Gansu, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China;
4. No.7 Geological Party, BGMERD of Xinjiang, Wusu 833000, Xinjiang, China;
5. No.8 Geological Party, BGMERD of Xinjiang, Akesu 843000, Xinjiang, China
Fund Project:
Abstract:
      The mud volcano results from magmatic eruption formed by geological fluid activity. The formation of mud volcano re-quires three conditions, i.e., mud source, mud migration channel and water supply. Geochemical data of 8 samples from Wusu mud volcanoes are characterized by enrichment of LREEs relative to HREEs. Chondrite standard abnormal δEu values are 0.760~0.805, (La/Yb)N is 5.47, and Ce/La is 2.22. The mud is enriched in large ion stone elements (LILE) such as Ba and Rb, whereas the high field strength elements (HFSE) Nb, Ta are strongly depleted. Sr/Ba ratios (0.33~1.01) suggest a lower paleo-salinity, Ce/La (2.22), Ceanom (-0.007), and V/(V+Ni) (0.78) ratios indicate that the source rocks were formed in a reducing environment. REE and trace el-ements analyse show that the source rocks of Wusu mud volcanoes were derived from lower Jurassic Dadaowan Formation and San-gonghe Formation, suggesting a river swamp-semi-deep lake sedimentary facies of coal-bearing strata which represent a kind of weak reducing environment. The mud volcano geochemical data and stratigraphic section of Wusu imply that the maximum depth of mud source strata is about 7~8km.
Keywords:mud volcano  geochemistry, Jurassic  shale  source rock strata  reducing environment  Wusu, Xinjiang
HTML  查看全文  查看/发表评论  下载PDF阅读器
您是本站第 5165862 位访问者
今日访问 7809 
版权所有@《地质通报》 编辑部
本系统由北京勤云科技发展有限公司设计
function PdfOpen(url) { var win="toolbar=no,location=no,directories=no,status=yes,menubar=yes,scrollbars=yes,resizable=yes"; window.open(url,"",win); } function openWin(url,w,h){ var win="toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no,width=" + w + ",height=" + h; controlWindow=window.open(url,"",win); } &et=2FA19B8FFDE8D2719E891F5F280D98EA2537A9BC2DAECC4CD656A576C3AB2F196DCE3013B8EB7536EB6B6E9A78491FEE5D108E9BA2EA13FE8D3ACE8BECA630185FDED87DB87BE06F64D1B9DE3BDD10B00CFEC418E818E27C&pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=621CF755B1A341E5&jid=B6579C86F203B551EAEF6FF655601072&yid=FA004A8A4ED1540B&aid=&vid=&iid=5D311CA918CA9A03&sid=1658FDEF8AE04907&eid=5A66347DEC1DE6F4&fileno=20170812&flag=1&is_more=0"> var my_pcid="E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B"; var my_cid="621CF755B1A341E5"; var my_jid="B6579C86F203B551EAEF6FF655601072"; var my_yid="FA004A8A4ED1540B"; var my_aid="";