贵州省福泉市榜上磷矿矿床地质特征及成因分析

Geological Characteristics and Genesis Analysis of Bangshang Phosphate Deposit in Fuquan City,Guizhou Province

本文通过对福泉市榜上磷矿磷矿石的化学成分、矿物组成、结构构造、物质来源、成矿作用及成矿模式的综合研究,认为在生物化学成磷作用和机械簸选富集作用下,由于东部的华夏洋板向扬子板块俯冲,导致多期海底火山喷发,使溶磷海水洋流上翻于碳酸盐台地形成磷质富集。区内陡山沱期沉积厚度受到南沱期古地貌制约,由两个较大的沉积旋回形成a、b两层矿总量达大型的生物化学沉积型磷块岩矿床。

In this paper,the chemical composition,mineral composition,structure,material source,mineralization and metallogenic model of the phosphate deposit in Bangshang,Fuquan have been studied,it is believed that the subduction of the eastern Cathaysian Plate to the Yangtze Plate resulted in a series of submarine volcanic eruptions under the action of biochemical phosphorus formation and mechanical jolt enrichment,the phosphorus-containing seawater current was upturned on the carbonate platform to form phosphorus enrichment.Controlled by the NantuoPeriod palaeogeomorphology,Due to the restriction of Nantuo paleogeomorphology,a and b ore-beds with a large amount of biochemical sedimentary phosphorite deposits were formed in the area.