Local, Proximal and Distal Saharan Dusts: Characterization and Contribution to the Sedimentation
Local, Proximal and Distal Saharan Dusts: Characterization and Contribution to the Sedimentation
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撒哈拉本地、近端和远端沙尘：特征及其对沉积的贡献
DOI：
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发表时间：
1989
期刊：
影响因子：
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通讯作者：
G. Coudé
中科院分区：
文献类型：
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作者：
G. Coudé
局部沙尘、近端沙尘和远端沙尘主要通过沙尘粒径分布与沙尘源距离的关系来区分。粗颗粒具有源自源区早期风成运动的遗传微形态。这是通过扫描电镜检查，图像分析和对应因子分析显示。然而，对于最细的粉尘颗粒，矿物学鉴定可能是困难的。在目前沉积或被困在岩石裂缝中的粉尘中，其粒度和微形态特征较好地保留了前风成期的遗传特征。
Local, proximal and distal dusts are mainly distinguished by their grain-size distributions in relation to the distance from their desert sources. The coarse particles have an inherited micromorphology derived from the incipient eolian mobilization in the source area. This is shown by SEM examination, image analysis and correspondence factor analyses. Yet, mineralogical identification may be difficult for the finest dust particles. In the presently deposited dusts or trapped dusts in the rock cracks, the grain-size and micromorphological characters, inherited from the previous eolian phase, are well-preserved.