海洋地质与第四纪地质2011，Vol.31Issue(6)：13-20,8.DOI:10.3724/SP.J.1140.2011.06013
大连湾近海表层沉积物重矿物组合分布特征及其物源环境指示
DISTRIBUTION OF HEAVY MINERAL ASSEMBLAGES IN SUBSURFACE SEDIMENTS OF DALIAN BAY AND THEIR IMPLICATIONS FOR PROVENANCE AND ENVIRONMENT
摘要
Abstract
The heavy mineral assemblages and their distribution pattern of the subsurface sediments of the Dalian Bay were preliminarily discussed in this paper in connection with their sources and depositional envi-ronments as well as dominant factors. A total of 29 species of heavy mineral were discovered in the study area, dominated by hornblende and followed by epidote and ilmenite. Using heavy mineral characteristic indexes (ATi, GZi, ZTR and UM/SM) , and the ratio of stable and unstable mineral as means, we divided the study area into 3 subregions, corresponding to 3 sedimentary environments. In the subregion of shal-low water in the north, where dynamic sorting dominated, sediments were mainly derived from the coastal erosion of the Liaodong Peninsula. In the subregion of Central platform, where hydrodynamics was weak and differentiation dominated the distribution of heavy minerals, sediments were from the east of the study area through a long distance of transportation. In the subregion of deep water in the south, where the dis-tribution of heavy minerals were affected by a multiple factors, including source, differentiation and sedi-mentary environment, the deposition of sediments was supposed to be related to the sediment resuspension driven by strong tidal current.关键词
重矿物/物质来源/沉积环境/大连湾Key words
heavy mineral/ provenance/ sedimentary environment/ the Dalian Bay/分类
海洋科学引用本文复制引用
李艳,李安春,黄朋..大连湾近海表层沉积物重矿物组合分布特征及其物源环境指示[J].海洋地质与第四纪地质,2011,31(6):13-20,8.基金项目
我国近海海洋综合调查与评价(908-01-CJ03、908-02-03-08) （908-01-CJ03、908-02-03-08）
国家自然科学基金项目(41076032) （41076032）
