干旱区生态环境知识资源中心(Arid): Aridification of the Egyptian Sahara 5000-4000 cal BP revealed from x-ray fluorescence analysis of Nile Delta sediments at Kom al-Ahmer/Kom Wasit

Arid

DOI	10.1016/j.quaint.2019.01.015
	Aridification of the Egyptian Sahara 5000-4000 cal BP revealed from x-ray fluorescence analysis of Nile Delta sediments at Kom al-Ahmer/Kom Wasit
	Pennington, Benjamin T.1,2; Hamdan, Mohamed A.3; Pears, Ben R.1; Sameh, Hamed I.4
通讯作者	Pennington, Benjamin T.
会议名称	International XRF Core Scanning Conference and Field Excursion
会议日期	MAR, 2017
会议地点	Natl Taiwan Univ, Taipei, TAIWAN
英文摘要	Elemental XRF analysis carried out on an 8 m long core from the Nile Delta reveals a gradual increase in the Ca/Ti ratio between 5000 and 4000 cal BP which is linked to the progressive development of hyper-aridity in this region. The increase results from elevated flux of aeolian material entering the Nile river system from calcareous source rock geologies in the dryer Egyptian Sahara. The most major increase in hyper-aridity occurs around 4000 cal BP. Such a perspective suggests a locally abrupt, regionally time-transgressive inception of hyperaridity in this region at the end of the African Humid Period. After this time, reorganisation of wind circulation meant that less Saharan-derived aeolian material entered the Nile Valley, and the contribution of aeolian material in the Nile's sedimentary signal was also dwarfed by an increase in Blue Nile sedimentary flux. Chronological control is provided by two radiocarbon dates and the top and bottom of a well-constrained pottery horizon that dates from the period of occupation of two nearby archaeological sites: Kom al-Ahmer and Kom Wasit.
英文关键词	Egypt Sahara Desertification African humid period XRF Kom al-Ahmer/Kom Wasit
来源出版物	QUATERNARY INTERNATIONAL
ISSN	1040-6182
EISSN	1873-4553
出版年	2019
卷号	514
页码	108-118
出版者	PERGAMON-ELSEVIER SCIENCE LTD
类型	Article; Proceedings Paper
语种	英语
国家	England;Egypt
开放获取类型	Green Accepted
收录类别	CPCI-S
WOS记录号	WOS:000471902100011
WOS关键词	LATE QUATERNARY EVOLUTION ; ENVIRONMENTAL-CHANGES ; MIDDLE HOLOCENE ; WESTERN DESERT ; GLOBAL CLIMATE ; RIVER DYNAMICS ; CATCHMENT-AREA ; HUMID PERIOD ; NORTH-AFRICA ; OLD KINGDOM
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	会议论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/308284
作者单位	1.Univ Southampton, Geog & Environm, Univ Rd, Southampton SO17 1BJ, Hants, England; 2.Reading Blue Coat Sch, Dept Geog, Sonning Lane, Reading RG4 6SU, Berks, England; 3.Cairo Univ, Dept Geol, Gamaa St, Cairo, Egypt; 4.Cairo Univ, Egypt Nanotechnol Ctr EGNC, Alexandria Desert Rd, Sheikh Zayed, Egypt
推荐引用方式 GB/T 7714	Pennington, Benjamin T.,Hamdan, Mohamed A.,Pears, Ben R.,et al. Aridification of the Egyptian Sahara 5000-4000 cal BP revealed from x-ray fluorescence analysis of Nile Delta sediments at Kom al-Ahmer/Kom Wasit[C]:PERGAMON-ELSEVIER SCIENCE LTD,2019:108-118.