织金煤田西南矿区菱铁矿产出形态及指相意义

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。

Siderite Occurrence Modality and Facies Directivity

Siderite is vastly developed in the Longtan, Changxing formations in southwestern mine area, Zhijin coalfield. Based on research findings of predecessors, analyzed siderite layer occurrence characteristics and sedimentary facies, reckoned that the siderite in the area can be reduced into 9 modalities, their sedimentary facies have meadow facies, sand and mud tidal flat facies, desalinating lagoon facies, barrier bar facies and open sea carbonate platform tidal fiat facies, most of them have facies direetivities. The result has major significance in sedimentary environment researches in the area.