Workshop on the Continental Margins: Evolution of Passive Continental Margins and Active Marginal Processes

美国国家科学院(NAS)海洋研究委员会(OSB)将于1988年底召开一次大陆边缘研讨会，以比较活动和被动大陆边缘的构造和演化。研讨会将分为两个部分。第一个重点是被动大陆边缘的演化。讲习班的这一部分将讨论岩石圈裂谷作用的机制；与大陆裂谷和被动边缘有关的岩浆作用；裂谷和被动边缘的层序和形态；以及被动边缘的沉积沉积。第二部分将集中于活动边缘过程，讨论会聚的板块边缘力学和活动板块边缘壳幔的演化。收敛板块边缘力学的研究将考虑收敛边界处的位移、地震活动和变形；转换断层的力学；俯冲力学；以及吸积楔的几何和变形。活动板块边缘演化的研究将考虑会聚的开始；大洋内岛弧和弧后盆地的构造演化；吸积地形；以及俯冲物质的命运。80名科学家将在一组联邦机构的支持下参加研讨会。讲习班的审议情况将总结在一份“会议记录”报告中，该报告将广泛分发给赞助机构和科学界。

The Ocean Studies Board (OSB) of the National Academy of Sciences (NAS) will convene a Workshop on Continental Margins in late 1988 to compare the tectonics and evolution of active and passive continental margins. The workshop will be divided into two parts. The first will focus on evolution of passive continental margins. This section of the workshop will consider mechanics of rifting of the lithosphere; magmatic proces- ses associated with continental rifts and passive margins; sequences and morphology of rifts and passive margins; and sedimentary deposition at passive margins. The second part will focus on active marginal processes and will address convergent plate margin mechanics and evolution of active plate margin crust and mantle. The study of convergent plate margin mechanics will consider displacements, seismicity, and deformation at convergent bound- aries; mechanics of transform faults; subduction mechanics; and geometry and deformation of accretionary wedges. The study of evolution of ac- tive plate margins will consider initiation of convergence; tectonic evolution of intra-oceanic island arcs and back-arc basins; accreted terrains; and fates of subducted materials. Eighty scientists will participate in the workshop with support from a group of Federal agencies. The deliberations of the workshop will be summarized in a "Proceedings" report which will be widely ditributed to the sponsoring agencies and the scientific community.