Evaluating the influence of meteorite impact events on global potassium feldspar availability to the atmosphere since 600 Ma
Evaluating the influence of meteorite impact events on global potassium feldspar availability to the atmosphere since 600 Ma
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DOI：
10.1144/jgs2018-084
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发表时间：
2018-10
影响因子：
2.7
通讯作者：
Ma.;Beverley C. Coldwell;Matthew Pankhurst
中科院分区：
文献类型：
--
作者：
Ma.;Beverley C. Coldwell;Matthew Pankhurst
钾长石存在于全球矿物气溶胶中（30%）。通过结合陨石坑大小和构造重建，我们能够对全球钾长石可用性的变化进行定量和自洽的评估。揭示了陨石撞击事件后钾长石可用性的显着差异。不同的撞击事件产生了含有不同量钾长石的灰尘。假设对气候的影响程度不同，现在应该通过查看地层记录来测试这些事件揭示了气候对不同尘埃矿物学的敏感性。补充材料：使用各种方法和重建模型确定古纬度的数据，以及陨石撞击事件对当代大陆大陆碱长石丰度和分布的估计，请访问：https://doi.org/10.6084/m9.figshare.c.4253312。
Potassium feldspar present in global mineral aerosol (30%. By combining crater size and tectonic reconstructions, we are able to provide a quantitative and self-consistent assessment of changes to global potassium feldspar availability. Considerable differences in potassium feldspar availability following meteorite impact events are revealed. Different impact events generated dust containing different amounts of potassium feldspar. Differing levels of influence upon climate are hypothesized, and should now be tested by looking at stratigraphic records of these events to reveal the sensitivity of climate to different dust mineralogy. Supplementary material: Figures showing palaeolatitude determinations using various methods and reconstruction models, and estimates of alkali feldspar abundance and distribution across contemporary continental landmasses for meteorite impact events are available at: https://doi.org/10.6084/m9.figshare.c.4253312