工业磷块岩物理富集成矿说
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摘要: 沉积矿床的形成并非象过去一向认为的那样,是一个单一因素一次反应的产物,而是一个多因素多阶段复杂过程的产物。其间至少要经过成矿物质汲取浓缩阶段,地球化学富集阶段及物理富集阶段等三个主要阶段(关于多因素多阶段成矿的问题将在另一篇文章中加以详细的论述)才能形成工业矿床(图1)。对工业磷块岩矿床来说,物理富集作用尤其显得重要。可以说,世界工业磷块岩矿床无一不是物理富集的直接产物。关于物理富集对沉积矿床成矿的重要性,作者在1980年杭州第二次全国矿床会议上曾提出论述,并得到不少与会者的赞同。经过这几年来各方面的调查研究,实际例证已愈来愈多。
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