珠江三角洲区域稳定性的地质环境分析

本文讨论了珠江三角洲的内动力型、内外动力结合型和外动力型三类不稳定地质因素，认为其区域稳定性主要为中等稳定（次稳定）地区。其中，东江断块、番禺、五桂山、珠海三个断隆和新会断陷是区域稳定性较好的地区，灯笼沙断陷、伶仃洋断块和万顷沙断陷是区域稳定性较差的地区，万山群岛断块是区内稳定程度最低的地区。

GEOLOGICAL ENVIRONMENT ANALYSES OF REGIONAL STABILITIES IN THE ZHUJIANG RIVER DELTA

The environments of unstable geological factors,such as active faults,earthquakesof endogenic force type,fault-block depression,Quaternary sediments,earth-surface sub-sidence,sea-water invasion,landslip,devolution of the association type of endogenic-exo-genic force,high deposition in estuary,erosion of river and tidal current ,and other exo-genic force types are discussed in this paper,It is suggested that the Zhujiang RiverDelta is mainly a medium stable(substable )zone in regional stability.Dongjiang faultblock,Panyu,Wuguishan and Zhuhai fault uplifts,and Xinhui fault-block depression, arethe best areas in regional stability.And Denglongsha and Wanqingsha fault-block de-pressions are the poorest areas in regional stability. Wanshan Island fault block is thelowest area in regional stability in the study area.