辽河三角洲地区ZK2孔晚更新世晚期以来的碎屑矿物及其物源

何磊; 叶思源; 王红霞; 袁红明; 薛春汀; 丁喜桂; 杨士雄; 王雪飞

doi:10.16562/j.cnki.0256-1492.2016.06.004

辽河三角洲地区ZK2孔晚更新世晚期以来的碎屑矿物及其物源

何磊^1,2,
叶思源^1,2,3,
王红霞⁴,
袁红明^1,2,
薛春汀⁵,
丁喜桂^1,2,
杨士雄^1,2,
王雪飞⁶

1. 中国地质调查局滨海湿地生物地质重点实验室, 青岛 266071;
2. 青岛海洋科学与技术国家实验室海洋地质过程与环境功能实验室, 青岛 266061;
3. 国土资源部海洋油气资源与环境地质重点实验室, 青岛 266071;
4. 国土资源部海洋地质实验检测中心, 青岛 266071;
5. 中国地质调查局青岛海洋地质研究所, 青岛 266071;
6. 同济大学海洋与地球科学学院, 上海 200092

基金项目:

国家海洋地质保障工程(DD20160144,GZH201200503,1212010611402)

国家自然科学青年基金项目(41506062)

国土资源部海洋油气资源与环境地质重点实验室基金(MRE201410)

详细信息

作者简介:
何磊(1987-),博士,助理研究员,主要从事海洋沉积与第四纪地层学研究,E-mail:hel_qimg@sina.com

中图分类号: P736.22
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出版历程
- 收稿日期: 2016-06-19
- 修回日期: 2016-10-27

DISTRIBUTION OF DETRITAL MINERALS IN THE CORE ZK2 AT THE LIAOHE DELTA AREA SINCE LATE PLEISTOCENE: IMPLICATION FOR PROVENANCE

1. Key Laboratory of Coastal Wetland Biogeosciences, China Geologic Survey, Qingdao 266071;
2. Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266061;
3. Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology, Ministry of Land and Resources, Qingdao 266071;
4. Inspection & Test Center of Marine Geology, Ministry of Land and Resources, Qingdao 266071;
5. Qingdao Institute of Marine Geology, Qingdao 266071;
6. School of Ocean and Earth Sciences, Tongji University, Shanghai 200092

摘要

摘要: 对辽河三角洲地区ZK2孔(孔深0~32 m)的92个沉积物样品中碎屑矿物进行鉴定和统计分析,结果显示:所有样品中轻矿物质量百分含量均超过95%,以石英和长石为主;重矿物质量百分平均含量仅为0.82%,以普通角闪石、绿帘石、阳起石、石榴子石、赤-褐铁矿和自生黄铁矿等为主。轻矿物组合和含量在地层中变化相对稳定,而重矿物组合和含量则在地层中变化显著。以所有重矿物各自百分含量为变量,利用Tilia软件进行有序聚类,自下而上可以划分出4个不同的重矿物组合带,这些组合带分别大致对应河道、湖沼、潮坪-浅海、三角洲4个沉积相环境。研究表明:不同组合带中各重矿物百分含量的变化与沉积环境紧密相关,其中沉积环境中水动力条件和离河口的远近,是控制重矿物中稳定矿物特别是金属矿物变化的主导因素。ZK2孔自晚更新世晚期以来沉积物源没有发生明显的变化,其主要物源来自辽河,其次为大辽河。
- 碎屑矿物 /
- 物源 /
- 辽河 /
- 辽河三角洲
Abstract: A total of 92 samples taken from the core ZK2 (depth 0~32 m) at the Liaohe Delta are analyzed for detrital minerals. It is revealed that the mass percentages of light minerals, which mainly consist of quartz and feldspar, are above 95% in these samples. The average mass percentage of heavy minerals is only about 0.82%, which include hornblende, epidote, actinolite, garnet, hematite, limonite and authigenic pyrite. The assemblages and percentage compositions of light minerals remain relatively stable while those of heavy minerals vary significantly since Late Pleistocene. According to the order cluster analysis on all detectable heavy minerals by software Tilia, we divide heavy minerals into 4 assemblages for the core ZK2 since Late Pleistocene, which approximately correspond to 4 sedimentary facies, namely river channel, marsh, tidal flat-shallow sea and deltaic environments. The research suggests that the percentage composition of each heavy mineral is mainly dependent upon the depositional environment, the sedimentary hydrodynamic conditions and the distance from estuary, especially for metallic minerals. There is no significant change in provenance for the sediments deposited since Late Pleistocene. The sediments were mainly derived from the Liaohe River and secondary the Daliaohe River.
- detrital minerals /
- provenance /
- Liaohe River /
- Liaohe Delta

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