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西南印度洋中脊扩张轴部(34.9°S)西翼沉积物地球化学分析及物源探讨
Alternative TitleGeochemistry and provenance of the sediment from the west flank of the spreading southwest Indian Oceanic Ridge(34.9°S)
林震1; 于洪军2; 徐兴永3; 杨继超2; 易亮4; 付腾飞3; 吕文哲3
2018
Source Publication海洋地质与第四纪地质
ISSN0256-1492
Volume38.0Issue:005Pages:14-29
Abstract西南印度洋中脊沉积物来源广泛,是区域海洋环境演化的记录器,对其沉积物特征及物源研究是区域古海洋研究的基础。对采自西南印度洋中脊扩张轴部(34.9°S)西翼的重力柱沉积物样品进行总碳、总有机碳、生物硅、主量元素、微量及稀土元素测试,测试结果显示,样品中生物成因组分为沉积物的主要组成,主要包括碳酸盐和二氧化硅;主微量元素除了Ca、Sr与LOI外,其余元素的分布趋势基本一致,且相关系数基本大于0.8。结合不同生物组分特点进行分析计算,获得了沉积物中各生物组分的含量。去除生物成因组分重新计算了非生物成因元素含量,通过潜在物源及相应地球化学指标对比分析,发现非生物成因组分主要由非洲南部风成陆源物质组成,含少量洋中脊硫化物与结壳物质。
Other AbstractThe multi-origin sediments on the southwest Indian Ridge(SWIR)are the archive of environmental evolution of the region.The study of sediment characteristics and provenances founded the basis of paleoceanographic study.In this paper,we analyzed the deep-sea sediment samples from a gravity core sampled at 34.9°S on the spreading SWIR,and a comprehensive data set was constructed for their bulk chemical compositions,including major elements,trace elements,and biocomponents.As the data show,the bulk samples are dominated by bio-components,consisting of high bio-carbonate and low bio-silica.The distribution patterns of major elements are rather accordant.Except for Ca,Sr,and LOI,the correlation coefficient of other major elements are greater than0.8.Based on the properties of bio-components of sediment,we computed the weight percentage of each bio-component.Removed the bio-components from the bulk,we recalculated the weight percentage of non-biotic elements.The data is used as geochemical proxies to study the potential sources.It is found that the abiotic component of the sediment is mainly terrestrial and local origin.The primary source is the aeolian dust from southern Africa,with a small amount of deposits from hydrothermal sulfide and manganese crust.
Keyword西南印度洋脊 地球化学 沉积物物源
Indexed ByCSCD
Language中文
CSCD IDCSCD:6359042
Citation statistics
Cited Times:1[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.idsse.ac.cn/handle/183446/8239
Collection研究生部
Affiliation1.中国科学院深海科学与工程研究所
2.国家海洋局国家深海基地管理中心
3.国家海洋局第一海洋所
4.同济大学
First Author AffilicationInstitute of Deep-sea Science and Engineering,CAS
Recommended Citation
GB/T 7714
林震,于洪军,徐兴永,等. 西南印度洋中脊扩张轴部(34.9°S)西翼沉积物地球化学分析及物源探讨[J]. 海洋地质与第四纪地质,2018,38.0(005):14-29.
APA 林震.,于洪军.,徐兴永.,杨继超.,易亮.,...&吕文哲.(2018).西南印度洋中脊扩张轴部(34.9°S)西翼沉积物地球化学分析及物源探讨.海洋地质与第四纪地质,38.0(005),14-29.
MLA 林震,et al."西南印度洋中脊扩张轴部(34.9°S)西翼沉积物地球化学分析及物源探讨".海洋地质与第四纪地质 38.0.005(2018):14-29.
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