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织金煤田西南矿区龙潭组、长兴组广泛发育菱铁矿层。在前人研究成果的基础上,对菱铁矿层赋存特征及沉积相进行了分析,认为区内菱铁矿可归纳为9种形态,其产出的沉积相有草甸相、沙泥潮坪相、淡化泻湖相、沿坝砂坝相、开阔海碳酸盐台地潮坪相,且多数形态具有指相意义。这一结论对区内沉积环境研究起到重要作用。
Longtan Formation and Changxing Formation in Southwest Mining Area of Zhijin Coalfield extensively develop siderite. On the basis of previous studies, the occurrence characteristics and sedimentary facies of siderite are analyzed. It is concluded that the siderite in this area can be classified into nine types with the sedimentary facies of meadow phase and sand mud Tidal flat, dilute the lagoon facies, dam bar facies, open ocean carbonate platform tidal flat phase, and most of the forms have the meaning. This conclusion plays an important role in the study of sedimentary environment in the area.