关于美国亚利桑那州西南部帕克沙丘早更新世起源的推测

IF 3.1 3区地球科学 Q2 GEOGRAPHY, PHYSICAL

Aeolian Research Pub Date : 2024-10-11 DOI:10.1016/j.aeolia.2024.100943

Yeong Bae Seong , Kenzie L. Shandonay , Ronald I. Dorn , Brian F. Gootee , Byong Yong Yu

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引用次数: 0

摘要

美国亚利桑那州西部的帕克沙丘是索诺拉沙漠中最大的沙丘系统。本研究从沙丘区东部巴特勒山谷 240 至 270 米深的钻孔中获得了简单的 10Be-26Al 宇宙成因埋藏年龄，即 1.90 ± 0.20 Ma。鉴于埋藏年代测定存在较大误差，我们只能推测帕克沙丘内已知最古老的风化沉积物与附近科罗拉多河约 2.1 Ma 的蝙蝠洞洪水事件以及更新世早期的区域气候干旱大致同时发生。由于帕克沙丘的其他位置可能存在更古老的沙丘沉积，因此其起源至少可以追溯到更新世早期。更重要、更广泛的意义在于，它强调了在风化研究中，作为宇宙成因埋藏年代测定的沉积物来源，井碴的潜力未得到充分利用。

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Speculation on an early Pleistocene origin of the Parker dunes of southwest Arizona, USA

The Parker Dunes in western Arizona, USA represent the largest dune system in the Sonoran Desert. This study presents a simple ¹⁰Be-²⁶Al cosmogenic burial age of 1.90 ± 0.20 Ma, obtained from well cuttings 240–270 m deep in Butler Valley, just east of the dune field. Given the large errors associated with burial dating, we can only speculate that this oldest known aeolian sediment within the Parker Dunes is roughly concurrent with the Bat Cave flood event ca. 2.1 Ma of the nearby Colorado River, as well as regional climatic aridity during the early Pleistocene. Since older dune deposits may be present at other locations in the Parker Dunes, its origin dates back to at least the early Pleistocene. The more important, broader implication rests in highlighting the underutilized potential of well cuttings as a sediment source for cosmogenic burial dating in aeolian research.

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来源期刊

Aeolian Research GEOGRAPHY, PHYSICAL-

CiteScore

7.10

自引率

6.10%

发文量

审稿时长

>12 weeks

期刊介绍： The scope of Aeolian Research includes the following topics: • Fundamental Aeolian processes, including sand and dust entrainment, transport and deposition of sediment • Modeling and field studies of Aeolian processes • Instrumentation/measurement in the field and lab • Practical applications including environmental impacts and erosion control • Aeolian landforms, geomorphology and paleoenvironments • Dust-atmosphere/cloud interactions.