Recognizing the sedimentary environments of sand layers in desert areas aids in evaluating the reliability of using these materials to assess paleoenvironmental changes. Nevertheless, determining whether eolian sand has ever been in a subaqueous sedimentary environment remains difficult. The work presented here tests microtextures on quartz grains from a predominantly eolian environment and tries to differentiate grains shaped purely by eolian processes from those also subjected to subaqueous action. In this study, 124 samples including lake sediments, river sediments, and eolian sediments were collected from the Badain Jaran Desert hinterland and adjacent areas. Microtextural assemblages on the quartz grains were analyzed by scanning electron microscopy. The results reveal that the microtextural features have variable frequencies among different sand samples, including lake sediments, eolian sand, and river sand. Eolian sand deposited in a subaqueous sedimentary environment not only has the specific microtextures of subaqueous sedimentary environments such as V-shaped percussion cracks, straight or curved grooves and scratches, oriented etch pits, solution crevasses, and scaling but also retains the unique microstructures of eolian sedimentary environments such as crescentic percussion marks. Therefore, the above microtextural features can distinguish whether eolian sand has ever been in a subaqueous sedimentary environment. This study provides a new method for discriminating the sedimentary environments of eolian sands in desert hinterlands.

认识沙漠地区沙层的沉积环境有助于评估使用这些材料评估古环境变化的可靠性。然而，确定风沙是否曾经在水下沉积环境中仍然困难。本文介绍的工作是在主要风沙环境中测试石英晶粒的微观结构，并试图将纯通过风沙过程成型的晶粒与也经历水下作用的晶粒区分开。在这项研究中，从巴丹吉林沙漠腹地及其邻近地区收集了124个样品，包括湖泊沉积物，河流沉积物和风积物。通过扫描电子显微镜分析石英晶粒上的微观组织。结果表明，在不同的沙样中，包括湖沉积物，风沙和河沙，其微观结构特征具有可变的频率。沉积在水下沉积环境中的风沙不仅具有水下沉积环境的特定微结构，例如V形的敲击裂纹，直或弯曲的凹槽和划痕，定向的蚀刻坑，溶液裂缝和结垢，而且还保留了风积的独特微结构。沉积环境，例如新月形的撞击声。因此，上述微观结构特征可以区分风沙是否曾在水下沉积环境中。这项研究提供了一种鉴别沙漠腹地风沙的沉积环境的新方法。和河沙。沉积在水下沉积环境中的风沙不仅具有水下沉积环境的特定微观结构，例如V形的敲击裂缝，直或弯曲的凹槽和划痕，定向的蚀刻坑，溶液裂缝和结垢，而且还保留了风化的独特微观结构沉积环境，例如新月形的撞击声。因此，上述微观结构特征可以区分风沙是否曾经在水下沉积环境中。这项研究提供了一种鉴别沙漠腹地风沙沉积环境的新方法。和河沙。沉积在水下沉积环境中的风沙不仅具有水下沉积环境的特定微结构，例如V形的敲击裂纹，直或弯曲的凹槽和划痕，定向的蚀刻坑，溶液裂缝和结垢，而且还保留了风积的独特微结构。沉积环境，例如新月形的撞击声。因此，上述微观结构特征可以区分风沙是否曾经在水下沉积环境中。这项研究提供了一种鉴别沙漠腹地风沙的沉积环境的新方法。笔直或弯曲的凹槽和划痕，定向的刻蚀坑，溶液开裂和结垢，但还保留了风沙沉积环境的独特微观结构，例如新月形的撞击声。因此，上述微观结构特征可以区分风沙是否曾经在水下沉积环境中。这项研究提供了一种鉴别沙漠腹地风沙的沉积环境的新方法。笔直或弯曲的凹槽和划痕，定向的刻蚀坑，溶液开裂和结垢，但还保留了风沙沉积环境的独特微观结构，例如新月形的撞击声。因此，上述微观结构特征可以区分风沙是否曾经在水下沉积环境中。这项研究提供了一种鉴别沙漠腹地风沙的沉积环境的新方法。