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重矿物的风化系数(稳定矿物百分含量/非稳定矿物百分含量)和碎屑矿物的长英比(长石百分含量/石英百分含量),可以代表碎屑矿物在沉积前及沉积时所经历的风化、剥蚀、搬运作用的影响。风化、剥蚀又反映了当时气候和构造运动状况。前人工作证明,这些曲线变化与古气候的变化紧密相关,可作为鉴别沉积物形成时古气候条件的有效手段之一;并进一步利用重矿物组合特征讨论冰期。
The weathering coefficient (stable mineral content / unstable mineral content) of heavy minerals and the Changying ratio (feldspar percentage / quartz percentage) of detrital minerals represent the distribution of detrital minerals before and during deposition The weathering, erosion, handling effects. Weathering and erosion also reflect the climate and tectonic movement at that time. Previous work proved that the changes of these curves are closely related to paleoclimate changes and can be used as an effective means of identifying paleoclimatic conditions during the formation of sediments. Furthermore, the use of heavy mineral assemblages to discuss the ice age.