Aeolian Dust Provenance in Central East Antarctica During the Holocene: Environmental Constraints From Single‐Grain Raman Spectroscopy

Aeolian Dust Provenance in Central East Antarctica During the Holocene: Environmental Constraints From Single‐Grain Raman Spectroscopy
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全新世南极洲中部的风尘来源:单晶拉曼光谱的环境限制

DOI:
10.1029/2019gl083402
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发表时间:
2019
影响因子:
5.2
通讯作者:
V. Maggi
V. Maggi
中科院分区:
地球科学1区
文献类型:
--
作者:
Chiara I. Paleari;B. Delmonte;S. Andó;E. Garzanti;J. Petit;V. Maggi

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我们分析了风成尘的单颗粒矿物组成,这些风成尘被运送到东南极洲中部,用于物源目的。与末次冰期的数据比较表明,在全新世碳酸盐的第一次消失与海平面上升和抑制紧缩从阿根廷大陆架,暴露在海洋同位素阶段2。与巴塔哥尼亚冰下/冰缘环境中的火山玻璃蚀变有关的Zealites也表现出类似的行为。其余的矿物,非常相似的两个气候时期之间,是兼容的Pamelos和巴塔哥尼亚的起源,但全新世的数据显示,一个更明显的火山和变质的印记和存在的矿物有关的温暖的气候风化环境兼容的额外贡献,从亚热带纬度的南美洲。这些结果并不意味着在最后一次气候转变之后,大气环流发生了大规模的重组。
We analyzed the single‐grain mineralogical composition of aeolian dust transported to central East Antarctica for provenance purposes. Comparison with data from the last glacial period shows for the first time disappearance of carbonates during the Holocene related to sea level rise and suppressed deflation from the Argentinean continental shelf, exposed during Marine Isotope Stage 2. Zeolites, related to alteration of volcanic glass in the subglacial/periglacial environment of Patagonia, show a similar behavior. The remaining minerals, remarkably similar between the two climatic periods, are compatible with a Pampean and Patagonian provenance, but Holocene data show a more pronounced volcanic and metamorphic imprint and presence of minerals related to warm climate weathering environments compatible with an additional contribution from subtropical latitudes of South America. These results do not imply a major large‐scale reorganization of atmospheric circulation after the last climatic transition.
南极东部富士穹顶极地冰中盐包裹体的特征
DOI: --
发表时间: 2006
期刊: Geophysical Research Letters 33
影响因子: --
作者:
Ohno;H.
通讯作者: H.
冰芯记录中的间冰期
DOI: --
发表时间: 2009
期刊:
影响因子: --
作者:
Tomoki Yoshihisa;Shojiro Nishio;氷見山幸夫;岩井茂樹;東久美子
通讯作者: 東久美子