摘要
墨西哥及墨西哥湾盆地中生代以来可划分为两个一级构造单元,分别是墨西哥造山带和墨西哥湾盆地,进一步可划分二级构造单元6个,其中在墨西哥造山带划分了3个二级构造单元,分别是下加里福尼亚造山带、西马德雷—南马德雷岛弧带和东马德雷逆冲挤压带。在墨西哥湾盆地也划分了3个二级构造单元,分别是墨西哥湾盆地区、佛罗里达地块和尤卡坦地块。墨西哥造山带的形成是大洋板块和大陆板块相互作用的结果,但在不同构造单元上的表现不同。墨西哥湾盆地是一个中生代—新生代的裂谷盆地,包括内陆带、沿海带和洋壳带。根据墨西哥湾盆地构造地层幕将墨西哥湾盆地构造演化分为5个演化阶段,分别为晚三叠世到早侏罗世时期裂谷阶段,中侏罗世裂谷和地壳衰减阶段,晚侏罗世洋壳生成阶段,早白垩世下降阶段和晚白垩世至新生代陆源物质沉积和盐构造变形阶段。
It can be divided into two first-grade tectonic units, Mexico orogen and Gulf of Mexico Basin, for the area of Mexico and Gulf of Mexico ever since Mesozoic. Furthermore, there are three secondary units, Baja California orogen, Sierra Madre occidental-Sierra Madre del sur arc, and Sierra Madre Oriental thrust belt in the Mexico orogen, and other three secondary units, Gulf of Mexico basin area, Yucatan Block and Florida Block in the Gulf of Mexico Basin. The formation of Mexico orogen was controlled by the subduction of Pacific plate to North American Continent plate with different expressions in each tectonic unit. Gulf of Mexico Basin is a rifting basin consisting of intra-continental zone, offshore zone and ocean crust zone during Mesozoic Cenozoic. According to the tectonic-stratigraphic phase, the tectonic evolution in Gulf of Mexico Basin can be divided into five stages： rift formation from late Triassic to early Jurassic, rift and crust attenuation in middle Jurassic, ocean crust formation in late Jurassic, crust descending in early Cretaceous, and terrigenous sedimentation and deformation of salt structures from late Cretaceous to Cenonoic era .
出处
《海洋地质动态》
北大核心
2010年第3期14-21,共8页
Marine Geology Letters
基金
国家专项(GT-YQ-QQ-2008)"墨西哥湾盆地油气地质综合研究与区域优选"(GT-YQ-QQ-2008-6-20)
