渤海湾曹妃甸近岸表层沉积物碎屑矿物分布及物源分析

胡延斌; 冯永财; 郝连成; 杨开丽; 庞国涛; 王克超; 刘建

doi:10.16028/j.1009-2722.2024.161

渤海湾曹妃甸近岸表层沉积物碎屑矿物分布及物源分析

中国地质调查局烟台海岸带地质调查中心，烟台 264000

基金项目: 中国地质调查局项目“渤海曹妃甸海域1:5万海洋区域地质调查”（DD20211553）

详细信息

作者简介: 胡延斌（1983—），男，硕士，高级工程师，主要从事海洋地质调查方面的研究工作. E-mail：gojoyo@163.com

通讯作者: 郝连成（1985—），男，硕士，高级工程师，主要从事海岸带综合地质调查方面的研究工作. E-mail：251035203@qq.com

中图分类号: P736.2

收稿日期: 2024-07-12

刊出日期: 2024-11-28

Sediment provenance and distribution in Caofeidian, Bohai Bay, revealed by offshore detrital mineral analysis

Yantai Center of Coastal Zone Geological Survey, China Geological Survey, Yantai 264000, China

More Information

Corresponding author: HAO Liancheng, 251035203@qq.com

Received Date: 12 July 2024

Publish Date: 28 November 2024

摘要

摘要:
为深入了解曹妃甸近岸表层沉积物碎屑矿物来源及分布特征，对该区161个表层沉积物样品进行碎屑矿物分析。结果表明，研究区共鉴定出11种轻矿物和27种重矿物，其中，轻矿物以长石、石英和片状矿物为主，质量百分含量平均值为82.2%；重矿物以角闪石、绿帘石和自生黄铁矿为主。根据碎屑矿物的组合分布特征及其聚类分析，研究区可分为3个矿物区：滦河矿物区、混合源区和黄河矿物区。研究认为，物源是控制研究区碎屑矿物组合与分布的主要因素，曹妃甸填海造陆活动改变了研究区周边水动力及沉积环境，进一步影响了该区碎屑矿物分布特征。
- 曹妃甸 /
- 碎屑矿物 /
- 物质来源 /
- 水动力环境 /
- 填海造陆
Abstract:
A comparative study on detrital minerals from 161 surface sediments in Caofeidian, Bohai Bay, was conducted to understand the sediment provenance and distribution. Eleven types of light minerals and 27 types of heavy minerals were identified in the study area. The light minerals were mainly feldspar, quartz, and flake minerals, with an average mass percentage of 82.2%. The heavy minerals consisted of predominantly hornblende, epidote, and authigenic pyrite. Based on the distribution characteristics and cluster analysis of detrital minerals, the study area could be divided into three sedimentary regions: the Luanhe River mineral region, the mixed source region, and the Yellow River mineral region. We concluded that provenance is the main factor controlling the assemblage and distribution of detrital minerals in the study area, and the land reclamation activities have changed the hydrodynamic and sedimentary environment in Caofeidian, and further affected the distribution characteristics of detrital minerals.
- Caofeidian /
- detrital mineral /
- provenance /
- hydrodynamic environment /
- land reclamation

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图 1 研究区位置及取样站位分布

Figure 1.

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图 2 研究区表层沉积物碎屑矿物和轻矿物含量分布

Figure 2.

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图 3 研究区表层沉积物重矿物含量分布

Figure 3.

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图 4 碎屑矿物组合分区

Figure 4.

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图 5 渤海湾泥沙输运方向

Figure 5.

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表 1 研究区表层沉积物碎屑矿物分区数据统计

Table 1. Data statistics of detrital minerals in surface sediments in the study area

矿物类型	矿物种类	矿物颗粒百分比/%
矿物类型	矿物种类	Ⅰ区（n=15）	Ⅱ区（n=55）	Ⅲ区（n=73）	全区（n=161）
轻矿物	石英	19.06	18.17	12.70	15.14
	长石类	36.53	52.52	52.46	51.20
	方解石	5.20	3.09	5.92	4.86
	白云石	1.26	1.22	1.85	1.58
重矿物	闪石类	32.69	19.64	37.21	30.62
	辉石类	1.53	0.10	0.00	0.04
	帘石类	18.75	34.63	25.97	28.44
	稳定矿物	7.41	3.36	3.73	3.68
	变质类矿物	0.46	0.20	0.40	0.32
	片状矿物	21.28	2.56	3.50	4.61
	钛铁氧化物	6.55	16.22	12.46	13.30
	重矿物质量百分数	26.28	20.44	14.20	17.79
注：n为样品数量。

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