威海南部近岸泥质区晚更新世以来的重矿物组合特征及对物源的指示

刘金庆; 宋红瑛; 印萍; 张勇; 曹志敏

doi:10.3969/j.issn.0253-4193.2018.03.013

威海南部近岸泥质区晚更新世以来的重矿物组合特征及对物源的指示

doi: 10.3969/j.issn.0253-4193.2018.03.013

1.
青岛海洋地质研究所国土资源部油气资源和环境地质重点实验室, 山东青岛 266071;青岛海洋科学与技术国家实验室海洋矿产资源评价与探测技术功能实验室, 山东青岛 266071
2.
青岛海洋科学与技术国家实验室海洋同位素与地质年代测试平台, 山东青岛 266237
3.
中国海洋大学海洋地球科学学院, 山东青岛 266100

基金项目: 国家自然科学青年基金项目（41706074，41406081，41506107）；山东地勘专项（201323）；科技部基础性专项（2013FY112200）。

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出版历程
- 收稿日期: 2017-06-26

Characteristics of heavy mineral assemblage and its indication of provenance in the mud area off the southern coast of Weihai since the Late Pleistocene

1.
Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology, Ministry of Land and Resources, Qingdao Institute of Marine Geology, Qingdao 266071, China;Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
2.
National Ocean Science Isotope and Geochronology Center, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China

摘要

摘要: 对威海南部近岸泥质区WHZK01孔（孔深25.1 m）岩心开展重矿物分析，结果表明，WHZK01孔主要以普通角闪石（22.1%）、磁铁矿（20.0%）和绿帘石（17.7%）为主，晚更新世以来自下而上可分为3个矿物组合带。氧同位素3期晚期河流相沉积（DU3）主要矿物组合为普通角闪石-绿帘石。末次冰后期河漫滩-河口湾相沉积（DU2）主要矿物组合为普通角闪石-绿帘石-钛铁矿-褐铁矿。全新世滨-浅海相沉积（DU1）主要矿物组合为磁铁矿-绿帘石-片状矿物-自生黄铁矿。重矿物物源判别表明，DU3和DU2层沉积物主要来自山东半岛南部沿岸河流输入。DU1层沉积物主要来自沿岸流输运的大量黄河细粒物质，沿岸河流物质和岛屿侵蚀物也有少量贡献。
- 重矿物 /
- 物源判别 /
- 泥质区 /
- 威海南部近岸
Abstract: Based on heavy mineral analysis of the shallow drilling (WHZK01) with a hole length of 25.1 m from the muddy area in the southern Weihai coast, the main mineral type of Core WHZK01 is hornblende (22.1%), magnetite (20.0%) and epidote (17.7%), three mineral assemblage units can be divided since the Late Pleistocene. (1) Fluvial facies (DU3, late MIS3) has a hornblende-epidote assemblage; (2) flood plain and estuarine faces (DU2, early MIS1) has a hornblende-epidote-ilmenite-limonite assemblage; (3) nearshore and shallow marine facies(DU1, Holocene) has a magnetite-epidote-micas-authigenic pyrite assemblage. Source identification indicates that the sediments of DU3 and DU2 are all from coastal rivers of the southern Shandong Peninsula. The sediments of DU1 are derived largely from the Yellow River transported by the coastal current, and are also influenced slightly by the coast rivers and island erosions.
- heavy mineral /
- provenance discrimination /
- muddy area /
- southern coast of Weihai

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