[1]冯乔,田方正,邹开真,等.柴达木盆地大煤沟地区多泉山组风暴沉积及其意义[J].新疆石油地质,2017,(06):701.[doi:10.7657/XJPG20170611]
 FENG Qiao,TIAN Fangzheng,ZOU Kaizhen,et al.Storm Deposit and Its Significance of Duoquanshan Formation in Dameigou Area, Qaidam Basin[J].Xinjiang Petroleum Geology,2017,(06):701.[doi:10.7657/XJPG20170611]
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柴达木盆地大煤沟地区多泉山组风暴沉积及其意义()
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《新疆石油地质》[ISSN:1001-3873/CN:65-1107/TE]

卷:
期数:
2017年06期
页码:
701
栏目:
出版日期:
2017-12-01

文章信息/Info

Title:
Storm Deposit and Its Significance of Duoquanshan Formation in Dameigou Area, Qaidam Basin
文章编号:
1001-3873(2017)06-0701-06
作者:
冯乔1田方正1邹开真2徐子苏1张耀1秦宇3
(1.山东科技大学 地球科学与工程学院,山东 青岛 266590;2.中国石油 青海油田分公司 勘探开发研究院, 甘肃 敦煌 736202;3.西北大学 大陆动力学国家重点实验室,西安 710069)
Author(s):
FENG Qiao1 TIAN Fangzheng1 ZOU Kaizhen2 XU Zisu1 ZHANG Yao1 QIN Yu3
(1.College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, China; 2.Research Institute of Exploration and Development, Qinghai Oilfield Company, PetroChina, Dunhuang, Gansu 736202, China; 3.State Key Laboratory of Continental Dynamics, Northwest University, Xian, Shaanxi 710069, China)
关键词:
柴达木盆地大煤沟地区多泉山组角砾状灰岩风暴沉积
Keywords:
Qaidam basin Dameigou area Duoquanshan formation brecciaous limestone storm deposit
分类号:
TE122.221;P588.245
DOI:
10.7657/XJPG20170611
文献标志码:
A
摘要:
柴达木盆地大煤沟地区下奥陶统多泉山组发育了一系列角砾状灰岩沉积组合,在宏观和微观上都具有风暴沉积的特征,是风暴作用形成的风暴岩。该区风暴沉积构造主要有底面侵蚀构造、粗粒滞留沉积、丘状层理、平行层理和水平层理;镜下多见生物碎屑与砂屑混杂现象,多具次生孔隙和缝合线。根据不同的沉积序列组合方式,将该区风暴沉积划分为原地风暴沉积、近源风暴沉积和远源风暴沉积,并建立了相应沉积环境模式。风暴沉积的发现,表明研究区在早奥陶世处于较低纬度的浅海台缘—斜坡环境,为研究古纬度与板块演化提供了地质学证据,在古地理恢复及油气勘探开发方面具有重要意义。
Abstract:
A series of brecciaous limestone sedimentary assemblages are developed in the Duoquanshan formation of Dameigou area, Qaidam basin. The assemblages show characteristics of storm deposits macroscopically and microscopically and belong to tempestite resulted from storm action. The storm sedimentary structures in the area mainly include basal erosion structure, coarse-grain lag deposit, hummocky bedding, parallel bedding and horizontal bedding. Observed under microscope, bioclasts and sand cuttings commonly mix with each other in the tempestite which is characterized by secondary pores and stylolite. Based on the different sedimentary sequence assemblages, the storm deposits in the study area are classified into in-situ storm deposit, near-source storm deposit and distal storm deposit, and corresponding sedimentary environment patterns are established. The discovery of the storm deposits indicates that the study area lied in a low-latitude neritic margin-slope environment during the Early Ordovician, which provides geological evidence for the studies on paleo-latitude and plate evolution and has great significance in paleogeography restoration and petroleum exploration and development.

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更新日期/Last Update: 2017-12-08