岩湾矿段风化磷矿形成条件及其三种类型

湖北省鹤峰磷矿走马矿区岩湾矿段风化磷矿是湖北境内首次探明的一中型风化磷矿。矿床成因类型有风化残余型、风化淋滤型、洪积型砂磷矿等三类。在时间上 ,风化淋积型矿体位于风化残余型矿体之下 ,是风化残余型的继承发展。在雨水和洪水冲刷下 ,风化残余磷矿在适当的低洼地带堆积成洪积型砂磷矿。对这种风化矿的勘探应因地制宜 ,灵活运用。对岩湾矿段风化磷矿的成因探讨和勘探研究为东山峰寻找和勘探类似风化磷矿积累了经验。

WEATHERED PHOSPHATE OF THE YANWAN ORE BLOCK: MINERALIZING CONDITIONS AND TYPIFICATION

The weathered phosphate of the Yanwan ore block of the Zuma mining district is the first of the proven weathered phosphate occurrences in the Hefeng phosphorus mine in Hubei province. It, an intermediate sized phosphate association, shows three metallogenic types, weathered residual, weathered leached and flooded detrital. The second type as usual underlies the first, representing an inheritor and developer of the latter which, while flooded and transported into lower topographies, would form the third type of flooded detrital phosphate. Exploring these types of phosphate should take exploration tools suited to local geological conditions. The previously accumulated rich experience in metallogenic explanation and prospection study may be used in the Dongshafeng ore block of the same mining district for hunting similar types of phosphate.