摘要
本文根据3个钻孔重矿物的垂向变化,将浙江沿岸第四纪地层划分为4～17层。黄铁矿、角闪石、绿帘石、金属矿物、菱铁矿、片状矿物在第四纪地层特别是在晚更新世以来的沉积物中较富集,而金红石、锆石、石、电气石、石榴石等含量较低。通常重矿物含量变化明显的地段即地层分层界线之所在。这与岩性、古生物、^(14)C测年的结果大体一致。全新世地层发育基本完好。此外,本文对重矿物组合类型与横向地层对比、沉积环境物质来源及地化环境之关系也作了初步探讨。
Based on the vertical change of heavy minerals in three holes ,the Quaternary strata of Zhejiang coast are divided into 4-17 units .In the Quaternary strata,pyrite, amphiboie.epidote, metallic minerals, siderite, and schistose minerals are abundant, specially since late Pleistocene they are more rich,and contents of rutile .zircon ,titanite, tourmaline,and garnet are lower Usually the layer in which heavy mineral content has a sudden change is just strata boundary The boundary is basically in keeping with that determined by petrography ,palaeobiology and cabon -14 dating data. Development of the Holocene strata roughly is well.Moreover,relations between association of heavy minerals and horizontal strata contrastsedimentary environment .substantial source ,and geochemistry significance are also discussed.
出处
《东海海洋》
1990年第2期29-37,共9页
Donghai Marine Science
