摘要
自本世纪60年代以来,浅地层剖面仪测量技术在世界各大陆架海都得到了广泛的应用,专家们取得了大量实际资料,并发表了多篇调查报告和研究成果(赵松龄,1991;秦蕴珊、赵松龄,1991;赵松龄、于洪军,1993),为查明世界各大陆架海的形成过程、地层结构、环境变迁、海面变化、岸线变迁、河道跟踪、以及地貌类型的划分等提供了新的信息,推动了世界大陆架地质学的发展。在应用浅地层剖面仪测量技术所取得的多种成果中,最为突出的研究,莫过于在世界上的若干大陆架区发现了古河道及其沉积,通过古河道的追踪又可以了解大陆架环境的变迁和海面变化的过程。所以,这项大陆架勘察技术问世以来,一直是大陆架地质勘察中不可缺少的手段之一。
In the last stage of Late Pleistocene, the sedimentary environment in the China continental shelf region was mainly cold and dry. The environment changes were due to monsoonal circulation brought about by the Mongolion High Pressure. Dunes and loess deposits and several sandy geomorphologie types comprised the sedimentary environment. The primary characteristics of sedimentation was desertization and occurrence of its derivative deposits.The main evidences of desertization deposits are: endless erosion surface, large range of mixed deposits, universal "angle of repose" texture, dune type deposits long distance interface of the most intense desertization and slightly intense desertization.
出处
《海洋科学集刊》
CAS
1995年第1期119-128,共10页
Studia Marina Sinica
基金
国家自然科学基金重大项目
49291100号
