| 塔中及相邻地区早奥陶世沉积格局新论 |
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| 引用本文： | 严威,王兴志,王振宇,杨海军,冉丽君.塔中及相邻地区早奥陶世沉积格局新论[J].沉积学报,2010,28(6):1090-1097. |
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| 作者姓名： | 严威 王兴志 王振宇 杨海军 冉丽君 |
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| 作者单位： | 西南石油大学,成都,610500;塔里木油田公司勘探开发研究院,新疆库尔勒,841000;中国石油化工股份有限公司西南油气分公司川西采气厂,四川德阳,618000 |
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| 摘 要： | 前人的观点认为，早奥陶世的塔里木盆地是一个统一的“大碳酸盐岩台地”，斜坡相呈马蹄形发育在古城—轮南一线。通过对塔中地区满加1井—塔中29井一线及相邻地区下—中奥陶统的岩石学、沉积学和地震地层学等方面的研究，发现这一线的下奥陶统主要由一套较深水的斜坡及海槽沉积构成，其地层厚度和地震反射特征也明显与周边地区不同，认为塔中及相邻地区在早奥陶世期间已经从早期的塔里木“大碳酸盐台地”中分化独立出来，分裂成塔中—巴楚台地、古城台地、塘南台地三块孤立台地，以塔北隔海相望。各孤立台地周缘发育台地边缘高能礁滩沉积体，呈条带状展布，主要由中高能粒屑滩组成；向内相变为台地相，发育台内滩、台内洼地、滩间海等亚相；向外进入较深水的斜坡—海槽沉积区，从而确立了塔中及相邻地区早奥陶世新的区域沉积格局。新沉积格局的确立，对于确立下奥陶统新的有利勘探区带具有重要的理论和现实意义，大大提升了研究区下奥陶统的油气勘探战略地位。
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| 关 键 词： | 塔中 下奥陶统 海槽 孤立台地 沉积格局 |
| 收稿时间： | 1900-01-01 |
New Evidence on the Sedimentary Framework of the Early Ordovician in Central Tarim and Adjacent Area |
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| YAN Wei,WANG Xing-zhi,WANG Zhen-yu,YANG Hai-jun,RAN Li-jun.New Evidence on the Sedimentary Framework of the Early Ordovician in Central Tarim and Adjacent Area[J].Acta Sedimentologica Sinica,2010,28(6):1090-1097. |
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| Authors: | YAN Wei WANG Xing-zhi WANG Zhen-yu YANG Hai-jun RAN Li-jun |
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| Institution: | Southwest Petroleum University, Chengdu 610500 |
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| Abstract: | The previous viewpoint considered that,the early Tarim basin was an unified carbonate platform,its slope was developed along the Gucheng-Lunnan area.Based on sedimentologic and seismic stratigraphic data from the lower-middle Ordovician,deep-water slope and basinal facies were recognized along the MJ1-TZ29 section,so that the Tazhong and its adjacent areas could have already been isolated from the unified carbonate platformand seprated into three platforms of Tazhong-Bachu,Gucheng and Tangnan,which was also... |
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| Keywords: | Tazhong area lower-middle Ordovician trough isolated platform sedimentary framework |
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