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1 火山型张裂边缘与非火山型张裂边缘张裂大陆边缘的结构和地层提供了大陆岩石圈裂谷作用、大洋岩石圈形成的胚胎阶段、边缘的沉降历史、相邻海洋的相对海平面变动以及板块运动或全球变化引起的古海洋和气候变化的记录.因此,张裂边缘的研究在大洋钻探计划(ODP)及其前身深海钻探计划(DSDP)中占有重要地位.通常,张裂边缘的演化被视为反复的、逐渐强化的大陆裂谷作用过程,它导致高度变薄的大陆地壳发生分裂并出现海底扩张.新近在伊比利亚岸外边缘的钻探(大洋钻探计划第103和第149航次)显示,此类边缘的演化确实可以导致地壳的强烈变薄,致使深部地壳和上地幔出露.
1 Volcanic and non-volcanic faults The structure and stratigraphy of the continental margins at the rifted margin provide the continental rifting, the embryonic stages formed by the oceanic lithosphere, the sedimentation history of the margin, the relative sea level of the adjacent ocean Changes and the record of paleoceanographic and climatic changes caused by plate movement or global changes.Therefore, the study of the rift margin plays an important role in the ODP and its predecessor Deep Sea Drilling Program (DSDP) Is considered to be a repetitive and gradually intensified continental rifting process that led to the division and expansion of the highly crustal continental crust with the recent drilling at the outer edge of the Iberian coast (Ocean Drilling Program Nos. 103 and 149 voyages) showed that the evolution of such margins did indeed lead to a sharp thinning of the crust, leaving the deep crust and upper mantle exposed.