Arid
DOI10.1016/0009-2541(93)90151-8
BORON, BERYLLIUM AND SULFUR IN HOLOCENE SEDIMENTS AND PEATS OF THE NILE DELTA, EGYPT - THEIR USE AS INDICATORS OF SALINITY AND CLIMATE
DOMINIK, J; STANLEY, DJ
通讯作者DOMINIK, J
来源期刊CHEMICAL GEOLOGY
ISSN0009-2541
出版年1993
卷号104期号:1-4页码:203-216
英文摘要

The concentrations of 14 major and trace elements (B, Ba, Be, Co, Cr, Cu, Fe, Mn, Ni, P, S, V, Zn and organic C) in bulk sediment samples of Holocene age from bore holes in the Nile delta, Egypt, are considered in terms of sediment grain size and depositional setting. Using this background information, an attempt is made to evaluate paleosalinity and paleoclimatic change by geochemical analyses of peats. In every sediment facies examined, we find that grain size is a major controlling factor of geochemical composition, but the B/Be ratio is helpful in paleoenvironmental interpretations.


Organic-matter content is the major factor affecting element concentrations in peats. Zn, Cr, Fe, Be, Cu, Mn concentrations on an organic-matter-free basis are lower in these organic-rich layers than in other Nile delta sediment facies. The sulfur content of the peats indicates a decreased importance of freshwater input to Holocene lagoons from about 8000 to 3400 years BP. High boron/beryllium ratios and the presence of gypsum in peats deposited between 6300 and 4900 years BP record the most evaporitic phase affecting this region. This geochemical finding is in close agreement with results of other independent paleoclimatic studies which indicate the onset of arid conditions in northeast Africa at about 5000 years BP.


类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:A1993KP49300012
WOS关键词LATE QUATERNARY ; ENVIRONMENTS ; SEQUENCES ; SYSTEMS ; SWAMP ; COAL
WOS类目Geochemistry & Geophysics
WOS研究方向Geochemistry & Geophysics
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/128625
作者单位(1)SMITHSONIAN INST,NMNH,MEDITERRANEAN BASIN,WASHINGTON,DC 20560
推荐引用方式
GB/T 7714
DOMINIK, J,STANLEY, DJ. BORON, BERYLLIUM AND SULFUR IN HOLOCENE SEDIMENTS AND PEATS OF THE NILE DELTA, EGYPT - THEIR USE AS INDICATORS OF SALINITY AND CLIMATE[J],1993,104(1-4):203-216.
APA DOMINIK, J,&STANLEY, DJ.(1993).BORON, BERYLLIUM AND SULFUR IN HOLOCENE SEDIMENTS AND PEATS OF THE NILE DELTA, EGYPT - THEIR USE AS INDICATORS OF SALINITY AND CLIMATE.CHEMICAL GEOLOGY,104(1-4),203-216.
MLA DOMINIK, J,et al."BORON, BERYLLIUM AND SULFUR IN HOLOCENE SEDIMENTS AND PEATS OF THE NILE DELTA, EGYPT - THEIR USE AS INDICATORS OF SALINITY AND CLIMATE".CHEMICAL GEOLOGY 104.1-4(1993):203-216.
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