凹凸石粘土与玄武岩的成因关系

在矿物组成研究的基础上，对比研究了凹凸棒石，蒙脱石，凹凸棒石粘土，蒙脱石粘土，玄武岩，风化玄武岩的化学组成。根据化学成分对比，分析了玄武岩与凹凸棒石粘土的成因关系，解释了玄武岩对凹凸棒石粘土的时空控制，结合地质观测，提出形成苏皖地区凹凸棒石粘土的物质成分基本上来源于玄岩的化学风化，但物质成分发生了较大的分异，凹凸棒石粘土不能直接同玄武岩经地表雨水的风化淋滤形成，而是玄武岩风化形成的蒙脱石经搬运沉积，再与镁质溶液反应形成，或凹凸棒石直接从富镁碱性溶液中结晶形成，凹凸棒石粘土形成的物理化学条件为偏碱性的还原条件。

THE GENETIC RELATIONSHIP BETWEEN PALYGORSKITE CLAY AND BASALT IN JIANGSU AND ANHUI PROVINCE

The chemical components of palygorskite, montmorillonite, palygorskite clay, montmorillonite clay, basalt, and weathering basalt were contrasted on the base of the research of mineral components. It is concluded that there is a deep genetic relation between the forming of palygorskite clay and basalt in space and time. With the characteristics of the palygorskite clay deposit, the genetic mechanisms were put forward. They are reactions between montmorillonite which come from weathering basalt with rich Mg 2+ solution, or crystallizations from rich Mg 2+ and alkaline solution. The matter forming palygorskite clay mainly come from chemical weathering of basalt and took place large chemical differentiation in weathering of basalt. The physicochemical conditions for the forming of palygorskite clays were alkaline and reduction.