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通过对云南马龙苍龙山Mo-Ni多金属矿区6个钻孔进行沉积相横向对比研究发现,上Mo-Ni矿层沉积相类型属于浅海下部,层序旋回方面位于三级层序海进体系域的上部,最大海泛期形成的凝缩层之下;下Mo-Ni矿层沉积相类型属于浅海下部,三级层序海进体系域的上部,沉积相由矿区西南到东北逐渐变浅.纵向上由老到新沉积相组合类型以陆源碎屑浅海-半深海-陆源碎屑滨浅海为特征,沉积物粒度向上逐渐变粗.结合区域岩相古地理特征,在早寒武世矿区靠近牛首山古岛,牛首山古岛作为物源区给矿区提供了大量陆源碎屑物质.
Through the horizontal contrast study on the sedimentary facies of six boreholes in the Mo-Ni polymetallic deposit at Longshan Mountain, Malong, Yunnan Province, the sedimentary facies belonged to the lower part of the shallow sea. The sequence stratigraphy was located in the third-order marine system tract Upper and lower seafloor phases. The sedimentary facies of the lower Mo-Ni deposit belongs to the lower part of the shallow sea, and the third-order sequence transits into the upper part of the sedimentary system. The sedimentary facies gradually becomes shallow from the southwest to the northeast of the mining area. From the old to the new sedimentary facies assemblages, the terrigenous crustal shallow sea-semi-deep sea-terrigenous crustal shallow sea features the grain size of the sedimentary facies gradually becoming thicker.With the palaeogeographic characteristics of the lithofacies in the area, Ancient Island, Niushou ancient island as a source area to the mining area provides a large amount of terrestrial debris.