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本文研究钱塘江河口区的重矿物组成、组合类型、重矿物的分区及其与水动力的关系,同时探讨其物质的来源。钱塘江河口区已鉴定的重矿物有25种,分为四种组合类型,同时存在与其相适应的四个重矿物区,近口段重矿物区、河口段重矿物区,杭州湾重矿物区与金山深槽重矿物区。钱塘江河口区在不同的区段其沉积物来源不一样。近口段主要来自钱塘江流域,口外海滨主要来自长江口,河口段则两者兼有,而金山深槽主要来自槽下被冲刷出来的全新世的沉积物。
This paper studies the composition of heavy minerals, the type of assemblage, the division of heavy minerals and their relationship with hydrodynamics in the estuary of the Qiantang River, and explores the sources of their material. There are 25 heavy minerals identified in the Qiantang estuarine area, which are divided into four types of assemblages. There are four heavy mineral areas, the heavy mineral areas near the mouth, the heavy mineral areas at the estuary and the heavy mineral areas at Hangzhou Bay And Jinshan deep groove heavy mineral area. The Qiantang estuarine areas have different sources of sediment in different sections. The near-mouth section mainly comes from the Qiantang River basin, the estuary outside the mouth mainly comes from the mouth of the Yangtze River, the estuary section from both sides, while the Jinshan deep-groove mainly comes from the Holocene sediments washed down from the trough.