Tectonic and climatic implications of alluvial fan sequences along the Batinah coast, Oman
Tectonic and climatic implications of alluvial fan sequences along the Batinah coast, Oman
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阿曼巴提奈海岸冲积扇序列的构造和气候影响
DOI：
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发表时间：
1994
影响因子：
2.7
通讯作者：
O. Chadwick
中科院分区：
文献类型：
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作者：
M. Abrams;O. Chadwick
沿着阿曼北方的Batinah海岸，从阿曼山脉延伸到阿曼湾的七层冲积扇遗迹被以前的工作者认为是第四纪隆起的证据。我们认为，这些区域性广泛的扇遗迹是由作用于阿曼山源头和主要干河系统的第四纪气候波动造成的。这些干谷的梯度过陡了两次：中第三纪隆起的山脉和一个主要的上新世-更新世冲积加积事件。目前仍在通过这一巨大的存款挖掘干谷渠道。气候引起的下切的阶段性性质产生了扇阶水平。南部Batinah海岸是阿拉伯板块与欧亚板块碰撞时倾斜的枢纽区。在北部，穆桑丹半岛和相关的扇正在下沉，以响应俯冲。在南部，上升的海洋海岸线表明了一个明显的刚性板块向北俯冲的反应。
Along the Batinah coast in northern Oman, seven levels of alluvial fan remnants stretching from the Oman Mountains to the Gulf of Oman were considered evidence for Quaternary uplift by previous workers. We suggest that these regionally extensive fan remnants were instead caused by Quaternary climate fluctuations acting on the Oman Mountain headwaters and the major wadi systems. The gradients of these wadis were oversteepened twice: by mid-Tertiary uplift of the mountains and by a major Plio-Pleistocene alluvial aggradation event. Wadi channels are still being cut through this massive deposit. The episodic nature of climatically induced downcutting has produced the fan-terrace levels. The southern Batinah coast is a hinge zone about which the Arabian plate is tilting as it collides with the Eurasian plate. To the north, the Musandam peninsula and the associated fans are subsiding in response to subduction. To the south, uplifted marine shorelines suggest an apparent rigid plate response to the northward subduction.