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

美国国家科学院海洋研究委员会（OSB）将于1988年底召开一次大陆边缘研讨会，比较活动和被动大陆边缘的构造和演化。工作坊将分为两个部分。第一部分将侧重于被动大陆边缘的演化。研讨会的这一部分将考虑岩石圈裂谷的力学；与大陆裂谷和被动边缘有关的岩浆过程；裂谷与被动边缘的层序与形态；以及被动边缘的沉积沉积。第二部分将重点讨论活动边缘过程，并将讨论会聚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在收敛边界处的位移、地震活动性和变形；转换断层机制；俯冲机制;以及吸积楔的几何和变形。研究活动板块边缘的演化将考虑辐合的起始；洋内岛弧与弧后盆地构造演化累积 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这次研讨会。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主办机构和科学界。

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.