渤海湾西岸全新统沉积特征及环境演化

鲁庆伟; 石文学; 郭维; 詹健; 李稳

doi:10.16562/j.cnki.0256-1492.2017.01.007

渤海湾西岸全新统沉积特征及环境演化

1.
天津华北地质勘查局地质研究所，天津 300170

2.
天津市海洋地质勘查中心，天津 300170

基金项目:
天津市矿产资源补偿费项目(天津市蔡公庄乡等1:5万区域地质调查国土房任[2014]20号)

详细信息

作者简介: 鲁庆伟(1981—)，男，硕士生，从事第四纪区域地质调查，E-mail:253702096@qq.com

中图分类号: P534.6

周立君编辑

收稿日期: 2016-06-28

修回日期: 2016-10-08

刊出日期: 2017-02-28

SEDIMENTARY CHARACTERISTICS AND ENVIRONMENT EVOLUTION OF THE HOLOCENE ON THE WEST BANK OF BOHAI BAY

1.
Geological Institute of North China Geological Exploration Bureau of Tianjin, Tianjin 300170

2.
Marine Geological Survey Center of Tianjin, Tianjin 300170

Received Date: 28 June 2016

Revised Date: 08 October 2016

Publish Date: 28 February 2017

摘要

摘要:
在研究区已施工22个钻孔及47处陡坎剖面调查基础上，详细研究了本区全新世地层的沉积物特征、沉积环境及其空间展布形态；认为本区全新统为一套由陆相-海相-陆相交互沉积的松散沉积物，成因类型主要为冲积、湖沼沉积以及海积，沉积相主要为分支河道、边滩、泛滥平原、潮汐河道、潮间带、潮上带、滨海湖沼等。受构造-气候事件影响，沉积物在横向上陆-海-陆交叉松散沉积叠加形似3个交错穿插的“楔形体”；垂向上，沉积物粒度具正韵律层序，局部海侵层可见反韵律层序。总体上反映该区全新世以来陆—海交互作用及海进—海退演变历程。
- 环境演化 /
- 沉积特征 /
- 渤海湾 /
- 天津 /
- 全新统
Abstract:
22 drilling holes and 47 scarp profiles were collected from the West Bank of the Bohai Sea for study of characteristics, distribution pattern and depositional environment of the Holocene. The Holocene in the area consists of unconsolidated terrestrial, marine and transitional deposits in various origin, such as alluvial, lacustrine and marine sediments. Upon the influence of sea level changes and tectonic movement, the sediments moved spatially with time and formed 3 wedge-like patterns in the region. Vertically, the sediments usually show fining-up rhythms with local reversed rhythms resulted from sea level variation.
- environmental evolution /
- sedimentary characteristics /
- Tianjin /
- Bohai Bay /
- Holocene

HTML全文

图 1 研究区位置示意图

Figure 1.

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图 2 中旺镇西砖厂采土坑陡坎剖面

Figure 2.

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图 3 蔡公庄北挖坑剖面

Figure 3.

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图 4 东槐庄采土坑剖面

Figure 4.

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图 5 天津组三段底板埋深及古地貌图

Figure 5.

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图 6 研究区全新统钻孔联合剖面对比

Figure 6.

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图 7 天津组二段底板埋深及古地貌图

Figure 7.

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图 8 天津组一段岩心照片

Figure 8.

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图 9 天津组一段下切河谷后期充填及底部测年

Figure 9.

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表 1 中旺镇西砖厂采土坑陡坎剖面岩性柱(所用¹⁴C半衰期为5 568 a, BP为距1950年的年代)

Table 1. The lithological column of a scarp profile

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表 2 钻孔ZK2岩性柱

Table 2. Lithological column of ZK2

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