| 墨西哥湾GC238区冷泉碳酸盐岩的微结构与石化微生物特征 |
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| 引用本文： | 杜江峰,刘招君,张雷,张健,任玉学,贺君玲,王建东.墨西哥湾GC238区冷泉碳酸盐岩的微结构与石化微生物特征[J].沉积学报,2008,26(1):61-69. |
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| 作者姓名： | 杜江峰 刘招君 张雷 张健 任玉学 贺君玲 王建东 |
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| 作者单位： | 中国科学院广州地球化学研究所边缘海地质重点实验室 广州 510640 |
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| 基金项目： | 国家重大专项(ZP-Y-01)，高校博士点基金项目(20050183051)，中石油吉林油田项目(JLYT-05-01-JS-73-1525) |
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| 摘 要： | 采于墨西哥湾GC238海底天然气渗漏区浅表层的冷泉碳酸盐岩呈结核状产出，由方解石微晶和胶结物及少量的黄铁矿构成。胶结物由直径为0.1～0.5 m的方解石化的球体、卵形体、棒状体组成，充填于方解石晶体之间。冷泉碳酸盐岩结核下表面发育有由方解石化的球体、卵形体、棒状体组成的薄层，其中的一些球状集合体（约5 m）断面显示发育有核和外壳的层圈结构。黄铁矿呈草莓状，也具有相似的层圈结构。这种层状结构与活体古细菌被硫酸盐还原细菌包裹的层圈结构相似。样品中所保存的球体、卵形体、棒状体及其所组成的层圈结构可能是石化的甲烷氧化古细菌和硫酸盐还原细菌。
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| 关 键 词： | 冷泉碳酸盐岩 微结构 甲烷氧化古细菌 硫酸盐还原细菌 墨西哥湾 |
| 文章编号： | 1000-0550（2008）O1-0061-09 |
| 收稿时间： | 2007-01-15 |
| 修稿时间： | 2007-07-12 |
Sedimentary Characteristics and Evolution of Early Cretaceous Dalazi Formation in Songjiang Basin, Jilin Province |
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| DU Jiang-feng,LIU Zhao-jun,ZHANG Lei,ZHANG Jian,REN Yu-xue,HE Jun-ling,WANG Jian-dong.Sedimentary Characteristics and Evolution of Early Cretaceous Dalazi Formation in Songjiang Basin, Jilin Province[J].Acta Sedimentologica Sinica,2008,26(1):61-69. |
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| Authors: | DU Jiang-feng LIU Zhao-jun ZHANG Lei ZHANG Jian REN Yu-xue HE Jun-ling WANG Jian-dong |
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| Institution: | Key Laboratory of Marginal Sea Geology, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Wushan Guangzhou Guangdong 510640 |
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| Abstract: | It is typically developed Dalazi Formation stratigraphy of Early Cretaceous in Songjiang Basin of Yanbian region of Jilin Province.According to lithologic series,from bottom to top,the stratigraphy of Dalazi Formation is divided into sandstone-conglomerate sector and oil-bearing shale sector.On the basis of the analyses of rock types of field sections and outcrops,grain features,primary sedimentary structure,paleontology fossil combination of Dalazi Formation,4 sedimentary facies are recognized:luvial fan facies,fan delta facies,lake facies and lake subaqueous fan,with 9 sedimentary subfacies.Plan view,fluvial fan is mainly formed in the south of Toudaogou,southeast of Basin,the belt zone along Yangcaogou to Dongnancha and northeast of Basin;Fan delta chiefly occurs at the circum of Basin,the east of Shajingou-Yangcaogou and the south of Yangcaogou-Xiaoshahe,and of which is much rich in northwest of Xiaoshahe;Lake facies mostly emergent at the center of Basin and the zone along Laopianpo,Dongshan,Shajingou,Songjiangtun;Lake subaqueous fan nearly concentrated in the zone north of Songjiangzhen-Shajingou,and some formed in the south of Dongnancha.The sedimentation and evolution of Dalazi Formation in Songliao Basin is obviously influenced and controlled by local tectonic activities,paleotopography,paleoclimate and base-level change.Early of Dalazi Formation,the Basin developed fluvial fan and fan delta,but lake facies is confided.The deposit center located in the belt of Xiaoshahe-Xinfeng and the sediments maily came from the northeast of the basin.After that,the basin expanded southwards,with deposit center moving to the zone of Yangmutun-Shenglitun.The basin developed lake facies,with some lake subaqueous fans distributed in somewhere of moderate deep lake and deep lake. |
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| Keywords: | sedimentary facies sedimentary evolution Dalazi Formation Songjiang Basin Early Cretaceous |
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