| 闽江河口表层沉积物重矿物特征与物源示踪 |
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| 引用本文： | 马晓红, 韩宗珠, 毕世普, 胡刚, 张勇, 徐承芬. 闽江河口表层沉积物重矿物特征与物源示踪[J]. 海洋地质与第四纪地质, 2018, 38(1): 87-95. doi: 10.16562/j.cnki.0256-1492.2018.01.009 |
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| 作者姓名： | 马晓红 韩宗珠 毕世普 胡刚 张勇 徐承芬 |
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| 作者单位： | 1.中国海洋大学，青岛 266100;; 2.国土资源部海洋油气资源与环境地质重点实验室，青岛 266071;; 3.中国地质调查局青岛海洋地质研究所，青岛 266071;; 4.中国地质大学(北京)，北京 100083 |
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| 基金项目： | 国家自然科学基金面上项目“山东半岛南部近岸泥质区形成过程对中小河流物源的响应及机制”(41376079)；“全新世以来长江远端三角洲的物质混合及其环境指示”(41676052)；海洋区域地质调查项目(DD20160137，GZH201400402) |
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| 摘 要： | 对闽江河口近岸海域的230个表层沉积物样品和闽江20个表层沉积物样品进行重矿物分析，系统地研究了重矿物的分布特征及其物源指示。研究区共鉴定出重矿物27种，主要以普通角闪石、绿帘石、磁铁矿和黑云母为主。根据重矿物组合分布特征，将研究区分为两个矿物组合区，并划分为3个矿物组合亚区。闽江口近岸沉积区(Ⅰ-1区)矿物组合为普通角闪石-磁铁矿-绿帘石，受闽江物质影响很大；近岸混合沉积区(Ⅰ-2区)矿物组合为普通角闪石-磁铁矿-黑云母-绿帘石，受浙闽沿岸流携带物质和闽江物质共同影响沉积形成，闽江物质影响明显减弱；残留沉积区(Ⅱ区)矿物组合为普通角闪石-绿帘石-磁铁矿，主要为受后期改造的晚更新世海侵边界层。
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| 关 键 词： | 重矿物 浙闽沿岸流 物源 闽江口 |
| 收稿时间： | 2017-05-31 |
| 修稿时间： | 2017-11-20 |
Heavy mineral composition in surface sediments of the Minjiang River estuary and its implications for provenance |
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| MA Xiaohong, HAN Zongzhu, BI Shipu, HU Gang, ZHANG Yong, XU Chengfen. Heavy mineral composition in surface sediments of the Minjiang River estuary and its implications for provenance[J]. Marine Geology & Quaternary Geology, 2018, 38(1): 87-95. doi: 10.16562/j.cnki.0256-1492.2018.01.009 |
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| Authors: | MA Xiaohong HAN Zongzhu BI Shipu HU Gang ZHANG Yong XU Chengfen |
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| Affiliation: | 1.Ocean University of China, Qingdao 266100, China;; 2.Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology, Ministry of Land and Resources, Qingdao 266071, China;; 3.Qingdao Institute of Marine Geology, CGS, Qingdao 266071, China;; 4.China University of Geosciences, Beijing 100083, China |
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| Abstract: | 230 surface sediment samples from the offshore and 20 samples from the river estuary of the Minjiang River are collected for this study. The distribution pattern of heavy minerals and their provenances are investigated with emphasis on provenances of sediments. A total of 27 species of heavy minerals are identified in the study area, dominated by hornblende, epidote, magnetite and biotite. According to the characteristics of heavy mineral assemblages, the research area is divided into two districts, and three subdistricts of mineral assemblages. The Minjiang estuarine depositional area (UnitⅠ-1) is dominated by an assemblage of hornblende-magnetite-epidote assemblage, under the control of the Minjiang River. The longshore mixed depositional area (Unit Ⅰ-2) is characterized by a hornblende-magnetite-biotite-epidote assemblage, resulted from the mixture of the Minjiang River materials and the materials carried by the Zhejiang-Fujian coastal current. The influence of the Minjiang River is obviously weakened in this area. The residual depositional area (Unit Ⅱ) has an assemblage of hornblende-epidote-magnetite, which is the Late Pleistocene deposits of transgressive boundary layer. |
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| Keywords: | Minjiang River estuary heavy mineral Zhejiang-Fujian coastal current sediment provenance |
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