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一、地質矿床的一般情况 長龙山鉄矿地質構造比較复杂,矿区北部为一背斜構造,本部为一倒轉背斜。長龙山鈇矿产於棲霞灰岩与黄龙灰岩之間,地表鉄矿产狀走向N70°E,傾向南60°～70°。因黄龙灰岩厚度較薄,时而尖灭,因此鉄矿亦产於棲霞灰岩与梧桐砂頁岩之間。根据过去的瓷料及推論,矿液是沿走向东西傾向南的一个逆掩断層侵入的。因此矿体的發育亦应成东西走向,向南傾斜。但根据勘探的結果,与这一理論矛盾,在00勘探線上,15号鑽孔見矿特别加厚(如圖2,全部鑽孔的佈置見圖1),而与其相隣的东部08勘探線14号鑽孔則一直在梧桐砂頁岩內鑽进,达330余公尺以上並未見矿。
First, the general situation of geological deposits Changlongshan 鉄 mine geological structure is more complex, northern mining area is an anticline structure, the Department of an inverted anticline. The Changlongshan 鈇 mineral is between Qixia limestone and Huanglong limestone, and the surface 鉄 mineralization goes to N70 ° E with a dip of 60 ° ~ 70 °. Due to the thin thickness of the Huanglong limestone, sometimes pinch out, so the ore is also produced in Qixia limestone and sycamore sand shale. Based on past porcelain and corollary, ore fluids intrude along an upturn that runs east-west. Therefore, the development of ore bodies should also become east-west direction and tilt southward. However, according to the exploration results, contradicting this theory, on the 00 exploration line, the No. 15 borehole is particularly thick in the mine (Figure 2, the layout of all the boreholes is shown in Figure 1), whereas the adjacent east 08 exploration line Drill No. 14 has been drilling in sycamore sand shale, reaching more than 330 meters did not see the mine.