On the mechanism of formation of reduction spots in the carboniferous/permian red beds of Warwickshire
On the mechanism of formation of reduction spots in the carboniferous/permian red beds of Warwickshire
复制标题
沃里克郡石炭系/二叠系红层还原斑的形成机制
DOI：
10.1017/s0016756800027965
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发表时间：
1984
影响因子：
2.3
通讯作者：
B. Hampton
中科院分区：
文献类型：
--
作者：
H. Mykura;B. Hampton
对恩维尔群的样品进行了灰色还原斑点的大小和形状的测量，以及点-围岩界面上铁含量的变化。由于Fe3+导致的红色被认为主要存在于胶结岩石矿物颗粒的基质材料中。Fe~(2+)的还原归因于沉积物中的碳质颗粒。为了解释斑点的尖锐边界，认为边界的向外移动是由于浓度相关的氧向内扩散，从而将碳质物质转化为碳酸盐。
Measurements of the size and shape of the grey reduction spots and of the variation of iron content across the spot–host rock interface have been made on samples from the Enville Group. The red coloration due to Fe3+ is thought to reside mainly in the matrix material cementing the mineral grains of the rock. The reduction to Fe2+ is ascribed to carbonaceous particles included in the sediment. To account for the sharp boundary of the spots it is suggested that the outward movement of the boundary is due to concentration dependent inward diffusion of oxygen which converts the carbonaceous material to carbonate.