Evaluating escarpment evolution and bedrock erosion rates in the western Guadalupe Mountains, West Texas and New Mexico
Evaluating escarpment evolution and bedrock erosion rates in the western Guadalupe Mountains, West Texas and New Mexico
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评估西德克萨斯州和新墨西哥州瓜达卢佩山脉西部的悬崖演化和基岩侵蚀率
DOI：
10.1016/j.geomorph.2020.107335
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发表时间：
2020
期刊：
影响因子：
3.9
通讯作者：
A. Happel
中科院分区：
文献类型：
--
作者：
L. Tranel;A. Happel
瓜达卢佩山脉高耸于德克萨斯州西部和新墨西哥州东南部周围的平原和盆地之上。尽管人们对该山脉的二叠纪地层学进行了广泛的研究，并与邻近的特拉华盆地的油气储层有关，但对其地貌历史知之甚少。特别是西部悬崖，从山脉的西部盐盆地陡然升起，瓜达卢佩峰高出周围景观约1600 米。本研究探讨了地质过程如何形成和维持瓜达卢佩山脉西部边界陡坡的陡峭剖面。现场产生的宇宙成因核素被用来量化山脉陡峭的西部锋面的侵蚀速率，以评估构造、气候和岩性力量如何影响悬崖剖面。侵蚀速率范围为1 ~ 73 m/Myr。在悬崖的南部地区，更快的侵蚀速度与更频繁的断层、边缘顶部的高海拔以及温度更低、降水更多的地区相吻合。横跨西部断崖面的地形剖面图表明，山脉北端的断裂面从原来的位置后退了更多。山脉中更快的侵蚀速度与瓜达卢佩山脉南端更大的隆起和更近期的活动有关。
The Guadalupe Mountains tower above surrounding plains and basins in western Texas and southeast New Mexico. Although this mountain range is extensively studied for the Permian stratigraphy related to the petroleum reservoirs in the adjacent Delaware Basin, little is known about the geomorphic history. The western escarpment, in particular, rises abruptly from the Salt Basin to the west of the range, and Guadalupe Peak rises ~1600 m above the surrounding landscape. This study investigates how geologic processes create and maintain the steep profile of the escarpment on the western boundary of the Guadalupe Mountain Range. In-situ produced cosmogenic nuclides were used to quantify erosion rates across the steep western front of the range to assess how tectonic, climatic, and lithologic forces influence the escarpment profile. Erosion rates range from 1 to 73 m/Myr. Faster erosion rates in the southern area of the escarpment coincide with more frequently mapped faults, higher elevations at the top of the Rim, and locations with colder temperatures and higher precipitation. Topographic profiles across the western escarpment surfaces indicate greater retreat from the original positions of fault surfaces at the north end of the mountain range. Faster erosion rates in the mountain range are linked to greater uplift and more recent activity in the southern end of the Guadalupe Mountains.
影响因子：
2.7
作者：
Marrero, Shasta M.;Phillips, Fred M.;Balco, Greg
通讯作者：
Balco, Greg