摘要
滨海砂矿受海岸物质类型的控制具有呈带分布的特点.不同矿种的滨海砂矿,具有不同的成矿时代,在第四纪地层中有着不同的分布规律和富集特点,而且与地层的成因密切相关.
Littoral placer deposits maitily exist in sandy and sandy-gravel coasts. Ac-cording to this, as well as the distributions of the littoral placer deposits, 7 advantageous mineralization zones can be recognized' in the whole littoral areas in China.
In Quaternary, littoral placer deposits are mostly formed in superficial, upper and raid'dle layers of sediments. Mainly they are transgressive, fluvial and eolian in origin. Then they can be seen in the bottom layers, formed during fluvial and eluvial-deluvial processes.
The mineralization of littoral placer deposits can be divided by stages. Most are formed in middle and late Holocene, then in early and middle late Pleistocene. During late late Pleistocene and early Holocene, only sea-floor placer deposits are formed, and in early and middle Pleistocene, there is very few mineralization.
Different mineral species have different ages of mineralization. And enri-chment laws are distinct in Quaternary. Mineral species with the same co-mercial types but different origins have different mineraliztion laws. So the enrichment laws should be follwed when searching for minerals.
出处
《海洋地质与第四纪地质》
CAS
CSCD
北大核心
1989年第2期41-49,共9页
Marine Geology & Quaternary Geology
