Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1006/jare.2000.0776 |
Textural attributes, mineralogy and provenance of sand dune fields in the greater Al Ain area, United Arab Emirates | |
Abu-Zeid, MM; Baghdady, AR; El-Etr, HA | |
通讯作者 | Abu-Zeid, MM |
来源期刊 | JOURNAL OF ARID ENVIRONMENTS
![]() |
ISSN | 0140-1963 |
出版年 | 2001 |
卷号 | 48期号:4页码:475-499 |
英文摘要 | Sand dunes and interdune sediments around Al Ain city have markedly high carbonate contents which increase towards Jabal Hafit mountain and the Arabian Gulf coast. The dunes are composed predominantly of well-sorted fine sands, consisting of unstrained quartz and carbonate grains together with minor proportions of chert and feldspars. Scanning electron microscope (SEM) examination reveals that quartz grains display various mechanically and chemically-formed surface textures. The heavy minerals are dominated by opaques and pyroxenes with minor tourmaline, garnet, rutile, epidote, monazite, zircon, hornblende and staurolite. Interdune sediments consist of fine and very fine, poorly- to extremely poorly-sorted sands together with small concentrations of gravel, silt and clay. The light sand fractions compositionally resemble those of dunes but contain, in addition, gypsum, anhydrite, halite and celestite. Percentages of pyroxenes are higher whereas those of zircon, tourmaline and rutile are lower than in dunes. X-ray diffractometry reveals that the clay fractions consist solely of palygorskite. Generally, interdune sediments are much less mature texturally and mineralogically than dune sands; the maturity of both types of sediments decreases toward the I-M of the study area. Sand dunes in the various districts of the greater Al Ain area are genetically related. Also, there is a partial genetic relationship between the dunes and interdune sediments; both are mainly multicyclic. Their major parts were brought mainly by the dominant north-west (El Shamal) winds from older dune fields in other localities in U.A.E., Qatar and El-Rub El-Khali. Local contributions to the dune fields from Jabal Hafit mountain, the Oman Mountains and the calcareous coast of the Arabian Gulf were, in cases, significant. Also, authigenesis by groundwater under highly evaporitic conditions played a major role in the formation of interdune sediments through the genesis of the clay and some nonclay minerals. (C) 2001 Academic Press. |
英文关键词 | Arabian Gulf United Arab Emirates arid regions sand dunes interdune sediments aeolian processes authigenesis |
类型 | Article |
语种 | 英语 |
国家 | U Arab Emirates ; Egypt |
收录类别 | SCI-E |
WOS记录号 | WOS:000170135400004 |
WOS类目 | Ecology ; Environmental Sciences |
WOS研究方向 | Environmental Sciences & Ecology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/141085 |
作者单位 | (1)United Arab Emirates Univ, Fac Sci, Dept Geol, Al Ain, U Arab Emirates;(2)Natl Author Remote Sensing & Space Sci, Cairo, Egypt |
推荐引用方式 GB/T 7714 | Abu-Zeid, MM,Baghdady, AR,El-Etr, HA. Textural attributes, mineralogy and provenance of sand dune fields in the greater Al Ain area, United Arab Emirates[J],2001,48(4):475-499. |
APA | Abu-Zeid, MM,Baghdady, AR,&El-Etr, HA.(2001).Textural attributes, mineralogy and provenance of sand dune fields in the greater Al Ain area, United Arab Emirates.JOURNAL OF ARID ENVIRONMENTS,48(4),475-499. |
MLA | Abu-Zeid, MM,et al."Textural attributes, mineralogy and provenance of sand dune fields in the greater Al Ain area, United Arab Emirates".JOURNAL OF ARID ENVIRONMENTS 48.4(2001):475-499. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。