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首页> 外文期刊>Geoderma: An International Journal of Soil Science >Quantifying the contribution of dust to alpine soils in the periglacial zone of the Uinta Mountains, Utah, USA
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Quantifying the contribution of dust to alpine soils in the periglacial zone of the Uinta Mountains, Utah, USA

机译：量化Uinta Mountains，Usa，Usa，USAN的Uinta Mountains的Periglacial区粉尘对阿尔卑斯土壤的贡献

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摘要

Profiles of alpine soils in the Uinta Mountains (Utah, USA) were investigated to determine how long-term dust deposition has influenced soil properties in this environment. Field studies were focused on four above-treeline sites, all of which were apparently beyond the reach of erosive glacial ice during the Pleistocene. Modern dust, soil A and B horizons, and local bedrock were compared in terms of major and trace element geochemistry, along with Sr and Nd isotope compositions. In all cases, soil samples are a mixture of dust and local bedrock end members, with A horizons more closely resembling dust, and B horizons more similar to bedrock. Calculations estimate that these soil profiles contain similar to 50 to 80% dust, which is effectively mixed downward into the solum by cryoturbation. Because these landscape positions were not glaciated, the total amount of dust contained within soil profiles is large relative to sites at lower elevation within the glacial limit. In addition to altering physical properties of these soil profiles, including horizonation and texture, deposition of dust rich in base cations positively influences soil fertility.
机译：研究了Uinta山脉（USA，USA）的高山土壤概况，以确定多长期粉尘沉积在这种环境中的土壤性质程度。田间研究侧重于四肢四肢植物，所有这些都显然超出了渗透冰川冰的侵蚀过程中。在主要和微量元素地球化学方面比较现代粉尘，土壤A和B个地域，以及当地基岩，以及SR和ND同位素组合物。在所有情况下，土壤样品都是灰尘和当地基岩末端成员的混合物，具有更紧密的灰尘，以及B个视野更类似于基岩。计算估计这些土壤型材含有类似于50至80％的灰尘，通过冰冷扰动有效地向下混合到溶液中。因为这些景观位置没有冰川，所以土壤型材中包含的灰尘总量相对于冰川极限内的较低高度的位置很大。除了改变这些土壤型材的物理性质之外，包括地平化和质地，富含基地阳离子的灰尘沉积地影响土壤肥力。

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