A late cenozoic age for long-wavelength surface uplift of the atlas mountains of Morocco
A late cenozoic age for long-wavelength surface uplift of the atlas mountains of Morocco
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DOI：
10.1111/j.1365-3121.2008.00794.x
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发表时间：
2008-04-01
期刊：
影响因子：
2.4
通讯作者：
Charroud, Mohammed
中科院分区：
文献类型：
--
作者：
Babault, Julien;Teixell, Antonio;Charroud, Mohammed
阿特拉斯山脉的隆起有两种机制：新生代地壳增厚和地幔岩石圈变薄，由于浮力热异常，以前推断的间接标准已开始约15马。由于地壳缩短相关的隆升和地幔相关的隆升在不同的空间尺度上影响地形，我们使用分散的直接地表证据来阐明古高程动力学。在Saiss盆地南缘和中阿特拉斯北方隆起的中生代浅海沉积物、Saiss盆地和高阿特拉斯南部皮埃蒙特倾斜的上新世湖相沉积物以及Saiss盆地的水系网络重组突出了地幔起源的阿特拉斯域的长波长岩石隆起。上述沉积物的低侵蚀表明，这种隆起是真正的地表隆起，发生在中新世后，最小速率为0.17至0.22毫米/年（-1）。
The Atlas Mountains have been uplifted by two mechanisms: Cenozoic thickening of the crust and thinning of the mantle lithosphere due to a buoyant thermal anomaly, previously inferred by indirect criteria to have started some 15 Ma. Because crustal shortening-related uplift and mantle-related uplift affect the topography at different spatial scales, we use scattered direct surface evidence to clarify the palaeoelevation dynamics. Uplifted Messinian shallow marine sediments in the southern margin of the Saiss Basin and in the northern Middle Atlas, tilted Pliocene lacustrine deposits in the Saiss Basin and in the piedmont of the southern High Atlas and drainage-network reorganization in the Saiss Basin underscore the long-wavelength rock uplift of the Atlas domain of mantle origin. The low erosion of the aforementioned deposits indicates that such uplift is a true surface uplift that occurred in post-Miocene times at a minimum rate ranging from 0.17 to 0.22 mm yr(-1).