墨西哥湾盆地东南部区域构造演化过程探讨  

Tectonic Evolution of the Southeastern Gulf of Mexico Basin

作　　者：王阔 栾锡武[2,3] 冉伟民 魏新元 张豪 石艳锋 MOHAMMAD Saiful Islam WANG Kuo;LUAN Xiwu;RAN Weimin;WEI Xinyuan;ZHANG Hao;SHI Yanfeng;MOHAMMAD Saiful Islam(School of Geosciences,China University of Petroleum,Qingdao,Shandong266580,China;Qingdao Institute of Marine Geology,China Geological Survey,Qingdao,Shandong266071,China;Laboratory for Marine Mineral Resources,Pilot National Laboratory for Marine Science and Technology,Qingdao,Shandong266237,China;College of Earth Science and Engineering,Shandong University of Science and Technology,Qingdao,Shandong266590,China;Faculty of Earth and Environmental Sciences,University of Dhaka,Dhaka1000,Bangladesh)

机构地区：[1]中国石油大学(华东)地球科学与技术学院,山东青岛266580 [2]中国地质调查局青岛海洋地质研究所,山东青岛266071 [3]青岛海洋科学与技术试点国家实验室海洋矿产资源评价与探测技术功能实验室,山东青岛266237 [4]山东科技大学地球科学与工程学院,山东青岛266590 [5]University of Dhaka,Faculty of Earth and Environmental Sciences,Dhaka 1000

出　　处：《现代地质》2020年第4期700-709,共10页Geoscience

基　　金：外交部、财政部亚洲区域合作专项“中国—东盟海洋地震数据平台与研究中心建设”(12120100500017001);鳌山科技创新计划项目“深海专项(预研)”(2016ASKJ11,2016ASKJ13,2017ASKJ02);青岛海洋科学与技术国家实验室基金项目“印尼爪哇盆地新生代构造变形及古地理演化”(QNLM201708);自然资源部公益性行业科研专项“海底冷泉拖曳式快速成像系统”(201511037)。

摘　　要：墨西哥湾盆地东南部位于北美板块与加勒比板块碰撞交汇区域,是墨西哥湾地区构造最为复杂区域。涉及两大板块,北美板块和加勒比板块;两个二级板块,尤卡坦板块和巴哈马-佛罗里达板块。在总结前人研究成果基础上,结合深海钻探计划(DSDP)钻井资料以及最新二维地震数据,通过地震相特征识别,分析研究区构造演化过程,探讨板块之间相对运动对墨西哥湾盆地东南部区域的控制作用。结果表明:(1)墨西哥湾盆地东南部现今包含北古巴前陆盆地以及盆地北部被动大陆边缘的不规则中央裂陷区;(2)该区域经历多期构造活动,早侏罗世至中侏罗世中期南美板块与北美板块之间背向分离,白垩纪加勒比板块逆冲北美板块,晚白垩世早期海平面上升以及尤卡坦台地与佛罗里达台地抬升,白垩纪末期加勒比板块北侧古加勒比弧与北美板块碰撞拼合;(3)在早白垩世晚期,由于北美板块内部尤卡坦板块与巴哈马-佛罗里达板块之间的张裂运动,发育大量张性断层,产生NW-SE走向的地堑、半地堑构造样式。The southeastern Gulf of Mexico(GoM)basin is located in the collision zone and tectonic junction of the North American and Caribbean plates.It involves two major plates(North American and Caribbean)and two minorplates(Yucatan and Bahamas-Florida).We summarized previous research findings,including Deep-Sea Drilling Program(DSDP)data and the latest two-dimensional(2D)seismic data.We discussed the controlling effect of relative plate movement on the southeastern GoM basin,through identifying the seismic phase features and analyzing the tectonic evolution processes.Our main findings are as follows:(1)The southeastern GoM basin now contains the northern Cuba foreland basin,and the irregular central rifts of the passive continental margin in the northern part of the basin.(2)The region has experienced multiphase tectonism,and the South American and North American plates were separated from each other during the Early to mid-Middle Jurassic.The Cretaceous Caribbean plate thrust over the North American plate.Sea-level rose in the early Late Cretaceous and the Yucatan and Florida platforms uplifted.The northern Caribbean arc collided with the North American plate at the end Cretaceous.(3)In the late Early Cretaceous,many extensional faults were developed due to the extension/rifting between the Yucatan and Bahamas-Florida plates in the North American plate,forming the NW-trending(semi-)graben tectonic patterns.

关 键 词：墨西哥湾盆地东南部 中央裂陷区 多期构造活动 地堑、半地堑 

分 类 号：P548[天文地球—构造地质学]