Grain-size trends reveal the late orogenic tectonic and erosional history of the south–central Pyrenees, Spain
Grain-size trends reveal the late orogenic tectonic and erosional history of the south–central Pyrenees, Spain
复制标题
粒度趋势揭示了西班牙比利牛斯山脉中南部的晚期造山构造和侵蚀历史
DOI：
10.1144/0016-76492011-087
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发表时间：
2012
影响因子：
2.7
通讯作者：
P. Allen
中科院分区：
文献类型：
--
作者：
A. Parsons;N. Michael;A. Whittaker;R. Duller;P. Allen
地层粒度趋势记录了构造和气候信号。在这里，我们以比利牛斯山脉南部古近纪同构造碎屑沉积物为例，展示了如何利用沉积物口径和碎屑岩性的测量来确定可容纳空间和沉积物预算的变化。我们确定了由局部构造沉降驱动的始新世中期粒度快速细化的区间；始新世晚期，当地住宿产生减少；渐新世区间显示，由于沉积物供应增加，粒度细化率降低了一个数量级。我们的结果表明，粒度趋势为探索控制沉积物路径系统的构造和气候边界条件提供了有力的手段。
Stratigraphic grain-size trends record tectonic and climatic signals. Here, we show how measurements of sediment calibre and clast lithology can be used to identify changes in accommodation space and sediment budget, using examples from Palaeogene syntectonic clastic deposits in the southern Pyrenees. We identify a mid Eocene interval of rapid grain-size fining, driven by local tectonic subsidence; a late Eocene interval of diminished local accommodation generation; and an Oligocene interval showing order-of-magnitude lower grain-size fining rates, driven by increased sediment supply. Our results demonstrate that grain-size trends provide a powerful means to explore the tectonic and climatic boundary conditions governing sediment routing systems.