南迦巴瓦峰地区冰碛物矿物与化学成分分析数据集（1982-1984）

在讨论冰川沉积过程、形成条件及其演变时，分析研究第四纪冰川沉积物结构构造、砾石组构、粒度特征、碎屑矿物、粘土矿物以及冰碛物化学成分等方面特征，对于了解冰碛层的沉积环境、冰川活动规模和冰期次数等有一定的意义。粘土矿物的X衍射分析结果表明（表1），各类冰碛物的粘土矿物组合均以水化金云母为主。这一粘土矿物成分特点，是经过冰川作用在特殊的环境中形成，如冰碛物粘土矿物中（冰川纹泥）水化金云母特别富集，可形成水化金云母粘土岩。 现将不同时代的5个冰碛样品的化学成分分析结果列表（表2），得出平均值，SiO2含量最高占53. 9% ，其次为Al2O3占13. 59%，依次为CaO、MgO、FeO、K2O、Fe2O3、Na2O等。据分析，冰碛物的化学成分与基岩密切相关。但由于冰川和水等的作用，其化学组成则随之发生较大的变化。When discussing glacial sedimentary processes, formation conditions and their evolution, analyzing the characteristics of Quaternary glacial sediments including their texture and structure, gravel fabric, grain size characteristics, detrital minerals, clay minerals and chemical composition of tills is of certain significance for understanding the depositional environment of till beds, the scale of glacial activity and the number of glacial stages. Results of X-ray diffraction analysis of clay minerals (Table 1) show that the clay mineral assemblages of all types of tills are dominated by hydrated phlogopite. This compositional feature of clay minerals is formed under special environments through glaciation. For example, hydrated phlogopite is particularly enriched in clay minerals of tills (varved clay), which can form hydrated phlogopite clay rock. The chemical composition analysis results of 5 till samples from different geological periods are tabulated here (Table 2), and their average values are calculated. Silicon dioxide (SiO₂) has the highest content, accounting for 53.9%, followed by aluminum oxide (Al₂O₃) at 13.59%, then calcium oxide (CaO), magnesium oxide (MgO), ferrous oxide (FeO), potassium oxide (K₂O), ferric oxide (Fe₂O₃), sodium oxide (Na₂O), etc. According to analysis, the chemical composition of tills is closely related to bedrock. However, affected by glaciation and water action, their chemical compositions undergo relatively great changes.

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背景概述

该数据集提供了南迦巴瓦峰地区1982-1984年期间冰碛物的矿物与化学成分分析数据，旨在研究第四纪冰川沉积过程和环境。数据集包含粘土矿物以水化金云母为主的特征，以及化学成分如SiO2、Al2O3等的含量分析，以Excel格式存储，包括粘土矿物含量和化学成分平均值对比两张表。