关于风化壳建造、古风化壳建造及其形成机理问题

DISCUSSIONS ON THE WEATHERING CRUST FORMATION,PALAEOWEATHERING CRUST FORMATION AND THEIR GENERATION MECHANISM

关键词:  风化壳物质  古风化壳物质  溶解流失

Key words:  weathering crust materials  palaeoweathering crust materials  loss by dissolution

摘要:

现代风化作用形成风化壳物质,经过迁移就位以后形成风化壳建造;第四纪以前的古风化作用则形成古风化壳物质,经过迁移就位以后形成古风化壳建造。它们既不同于海相沉积,也不同于陆相沉积,与板块构造也无关系。但是它们有相同的风化作用形成机理;有大同小异的风化矿物、结构构造,以及颗粒大小不一,排列杂乱的产出特征,也有相同的迁移就位特征。是一个独特的建造,值得讨论。

Abstract:

The weathering crust materials resulted from modern processes are migrated and emplaced to form the weathering crust formations,whereas the palaeoweathering crust materials resulted from ancient weathering processes before the Quaternary were migrated and emplaced to form the palae-oweathering crust formations. These distinct formations generally differ from the marine and conti-nental sediments but also have nothing to do with plate tectonics;nevertheless,as a kind of distinc-tive formations,they are well worth discussing in view of their similarity in generation mechanism, weathered mineral,texture and structure,migration and emplacement mechanism as well as the het-erogeneity in grain size and random arrangement of grains.