南海东北部下陆坡20 ka以来稀土元素沉积地球化学特征变化及其对物源的指示
Sedimentary geochemistry properties of rare earth elements from the continental lower slope of the northeastern South China Sea over the last 20 ka and its implication for provenance
查看参考文献53篇
|
文摘
|
本文通过对南海东北部STD235沉积柱状样品稀土元素(REE)分布模式及特征参数的分析,结合主量元素分析结果,探讨了STD235柱状样沉积物REE指示的物质来源及其纵向变化与环境之间的关系。研究结果表明: 20 ka以来STD235站位的沉积物具有基本相同的物质来源,以陆源物质输入为主。通过与周边河流沉积物的对比分析发现,STD235柱状样沉积物REE上地壳标准化的配分模式及其特征参数分布与台湾东南部河流沉积物具有密切的亲缘关系,表明该站位陆源物质主要来源于台湾东南部河流输入,进一步的分析表明台西南河流沉积物对该站位也有所贡献,沉积物的搬运过程主要受到了北太平洋深海流及黑潮的影响。沉积物中REE和主量元素的纵向变化指示20 ka以来南海东北部下陆坡的沉积物源区在冰期时风化作用较弱,间冰期则相对增强。该变化与沉积物源区的气候环境变化有关,指示了20 ka以来台湾地区气候由相对冷干向暖湿转变,由此推测20 ka以来台湾岛和华南地区应该受相同环境因素的制约,东亚季风系统是控制该区域环境变化的主因。此外,在约16~13 ka BP的末次冰消期期间,STD235柱状样沉积物中的各项指标都发生了显著的变化,并都指示了风化作用的逐渐增强,代表了该阶段沉积物源区逐渐向暖湿的气候环境转变。 |
|
其他语种文摘
|
Rare earth elements (REEs) and major elements in Core STD235 sediments from the northeastern South China Sea (SCS) were analyzed. Combined with the results,the sediment provenance and the relationship between the vertical variations of REE parameters and climate change were discussed. REE chemical characteristics showed that the sediments in the investigated site had the same main provenance and were dominated by the terrestrial contribution during the last 20 ka. The UCC-normalized REE pattern and REE parameters of sediments from Core STD235 are close to sediments from southeastern Taiwan Rivers,indicating that sediments were primarily derived from the southeastern Taiwan rivers. Further analysis implied that the southwestern Taiwan rivers might also make contribution to the core STD235. The sediments might be transported by the North Pacific Deep Water and Kuroshio through the Luzon Strait into SCS. Synthetically analysis potentially denotes the climatic environment variations should be the main factor causing the vertical variations of REE indexes. The analysis indicated the stronger chemical weathering intensity during the last interglacial period than that during the last glacial period on the source areas of the sediment, implying a warmer and wetter climate in Taiwan during the last interglacial period. The variations of chemical weathering intensity recorded in sediments might be associated with changes of environment and climate on the source areas. It is speculated that the controlling factors of environment and climate on Taiwan Island were similar to the south China, and the East Asian monsoon system might be the primary cause of the regional environment and climate changes. In addition,abrupt changes in almost of all proxies of the Core STD235 sediments from about 16 ka BP to 13 ka BP occurred and indicated a stronger chemical weathering,which implied the environmental and climatic condition on source area changed to warm and humid climate during that period. |
|
来源
|
海洋学报
,2018,40(9):148-158 【核心库】
|
|
DOI
|
10.3969/j.issn.0253-4193.2018.09.013
|
|
关键词
|
南海
;
稀土元素
;
沉积物来源
;
古气候
|
|
地址
|
1.
中国科学院广州地球化学研究所, 有机地球化学国家重点实验室, 广东, 广州, 510640
2.
中国科学院大学, 北京, 100049
3.
中国地质调查局广州海洋地质调查局, 自然资源部海底矿产资源重点实验室, 广东, 广州, 510760
|
|
语种
|
中文 |
|
文献类型
|
研究性论文 |
|
ISSN
|
0253-4193 |
|
学科
|
海洋学 |
|
基金
|
国家自然科学基金
|
|
文献收藏号
|
CSCD:6327399
|
参考文献 共
53
共3页
|
|
1.
Goldberg E D. Chemistry of Pacific pelagic sediments.
Geochimica et Cosmochimica Acta,1958,13(2):153-212
|
CSCD被引
28
次
|
|
|
|
|
2.
Mclennan S M. Rare earth elements and sedimentary rocks: influence of provenance and sedimentary processes.
Reviews in Mineralogy,1989,21(8):169-200
|
CSCD被引
410
次
|
|
|
|
|
3.
付淑清. 南海南部陆坡晚第四纪沉积物稀土元素及环境意义.
热带地理,2010,30(1):24-29
|
CSCD被引
7
次
|
|
|
|
|
4.
Munksgaard N C. Rare earth elements as provenance indicators in North Australian estuarine and coastal marine sediments.
Estuarine,Coastal and Shelf Science,2003,57(3):399-409
|
CSCD被引
26
次
|
|
|
|
|
5.
李春娣. 西太平洋暖池温区中心REE记录的沉积序列及特征气候事件.
自然科学进展,2005,15(7):830-836
|
CSCD被引
4
次
|
|
|
|
|
6.
窦衍光. 北部湾东部海域表层沉积物稀土元素组成及物源指示意义.
地球化学,2012(2):147-157
|
CSCD被引
45
次
|
|
|
|
|
7.
蓝先洪. 东海外陆架晚第四纪沉积物的稀土元素组成及物源示踪.
地球学报,2014,35(3):305-313
|
CSCD被引
12
次
|
|
|
|
|
8.
韦刚健. 南海碎屑沉积物化学组成的气候记录.
海洋地质与第四纪地质,2003,23(3):1-4
|
CSCD被引
16
次
|
|
|
|
|
9.
靳建辉. 新疆伊犁河谷晚全新世风沙沉积主量元素特征及其气候意义.
古地理学报,2010,12(6):675-684
|
CSCD被引
7
次
|
|
|
|
|
10.
金海燕. 南海北部晚第四纪高分辨率元素比值反映的东亚季风演变.
第四纪研究,2011,31(2):207-215
|
CSCD被引
18
次
|
|
|
|
|
11.
赵泉鸿. 南海第四纪古海洋学研究进展.
第四纪研究,1999,19(6):481-501
|
CSCD被引
41
次
|
|
|
|
|
12.
Sholkovitz E R. Island weathering: river sources of rare earth elements to the Western Pacific Ocean.
Marine Chemistry,1999,68(1/2):39-57
|
CSCD被引
32
次
|
|
|
|
|
13.
刘宝林. 南海北部陆坡海洋沉积物稀土元素及物源和成岩环境.
海洋地质与第四纪地质,2004,24(4):17-23
|
CSCD被引
21
次
|
|
|
|
|
14.
Liu Z F. Clay mineral distribution in surface sediments of the northeastern South China Sea and surrounding fluvial drainage basins: Source and transport.
Marine Geology,2010,277(1):48-60
|
CSCD被引
97
次
|
|
|
|
|
15.
Ludmann T. Upward flow of North Pacific Deep Water in the northern South China Sea as deduced from the occurrence of drift sediments.
Geophysical Research Letters,2005,32(5):215-236
|
CSCD被引
59
次
|
|
|
|
|
16.
Reimer P J. IntCal09 and Marine09 radiocarbon age calibration curves,0-50, 000 years cal BP.
Radiocarbon,2009,51(4):1111-1150
|
CSCD被引
105
次
|
|
|
|
|
17.
Stuiver M. Extended 14C data base and revised CALIB 3.0 14C age calibration program.
Radiocarbon,1993,35(1):215-230
|
CSCD被引
175
次
|
|
|
|
|
18.
Condie K C. Another look at rare earth elements in shales.
Geochimica et Cosmochimica Acta,1991,55(9):2527-2531
|
CSCD被引
81
次
|
|
|
|
|
19.
Dou Y G. Provenance discrimination of last deglacial and Holocene sediments in the southwest of Cheju Island,East China Sea.
Palaeogeography,Palaeoclimatology,Palaeoecology,2015,422:25-35
|
CSCD被引
11
次
|
|
|
|
|
20.
Talor S R.
The continental crust: its composition and evolution,1985
|
CSCD被引
5
次
|
|
|
|
|
了解气象卫星更多信息，请访问