Refuting the evidence for an earlier birth of the Taklimakan Desert
Refuting the evidence for an earlier birth of the Taklimakan Desert
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DOI：
10.1073/pnas.1517525112
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发表时间：
2015-10
期刊：
影响因子：
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通讯作者：
Jimin Sun;B. Alloway;X. Fang;B. Windley
中科院分区：
文献类型：
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作者：
Jimin Sun;B. Alloway;X. Fang;B. Windley
在最近一期的PNAS中，郑等人。(1)报道了中国西北部塔克拉玛干沙漠的“晚渐新世-早中新世时代”。他们的年龄是基于黑云母的40Ar/39Ar定年和西峪组层中锆石的U-Pb定年，他们将其解释为“火山灰”。这个年表有效地将塔克拉玛干沙漠的形成时间从最近露头(2)和高分辨率钻孔数据(3)报道的∼5 Ma延长到27 Ma(1)。
In a recent issue of PNAS, Zheng et al. (1) report a “Late Oligocene–Early Miocene age” of the Taklimakan Desert in northwest China. Their age was based on 40Ar/39Ar dating of biotites and U–Pb dating of zircons from layers within the Xiyu Formation, which they interpreted as “volcanic ash.” This chronology effectively extends the formation of the Taklimakan Desert from ∼5 Ma, as recently reported from outcrop (2) and high-resolution borehole data (3), to 27 Ma (1).