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长广煤田位于苏浙皖交界地区,行政上属于浙江省长兴县和安徽省广德县。含煤地层为上二迭统龙潭组,其下与孤峰组、上与长兴组均呈假整合接触。 龙潭组根据岩性、岩相、含煤性可划分为三段:下段为深灰色砂质泥岩、粉砂岩和细砂岩互层,偶见动物化石,植物化石碎片很多。底部黑色泥岩,富含有机质和黄铁矿
Chang Guang coal field is located in Jiangsu, Zhejiang and Anhui junction area, administratively belong to Changxing County, Zhejiang Province and Guangde County, Anhui Province. The coal-bearing strata are the Longtan Formation on the Upper Permian, and the lower and Gufeng formations on the upper and the Changxing Formation all show false integrated contact. According to lithology, lithofacies and coal-bearing properties, Longtan Formation can be divided into three sections: the lower section is dark gray sandy mudstone, siltstone and fine sandstone interbed, and occasionally animal fossils and many plant fossil fragments. Bottom of black mudstone, rich in organic matter and pyrite