华南泥盆纪古地理环境对宁乡式铁矿床时空分布、矿石特征的制约

泥盆纪宁乡式铁矿床是我国分布最广、储量最多的沉积型铁矿床,广泛分布于我国华南的鄂、湘、赣、川、滇、黔、桂等省(区)及甘南等地,矿床的时空展布和矿石组合受控于沉积盆地的古地理环境.根据宁乡式铁矿床的分布情况划分出8个成矿区,根据华南地区泥盆纪构造格局划分出8种盆地类型.在详细分析各盆地内矿床特征的基础上,总结出陆内凹陷盆地对成矿最为有利,晚泥盆世铁矿床相对集中,规模较大,矿化强度高;在同一盆地内,盆地边缘矿床的矿石为碱性矿石,多为贫矿,磷含量较低,靠近盆地中心的矿床规模巨大,矿石为酸性矿石,品位较高,富矿所占比重较大,磷含量较高.最后,针对不同类型矿石提出了其不同的可利用性和不同的矿物加工利用技术.

Constraints of South China Devonian Ningxiang Palaeogeography on the Temporal and Spatial Distribution of Iron Ore Deposits and Their Characteristics

Devonian Ningxiang type iron deposits,the largest reserves of iron ore in China,are widely distributed in Hubei,Hunan,Jiangxi,Sichuan,Yunnan,Guizhou,Guangxi in South China and southern Ganshu.Their temporal and spatial distribution of deposits and ore portfolio are controlled by geographical environment of the ancient sedimentary basin.Eight mineral districts are divided based on the distribution of iron deposits,while eight basin types are distinguished according to the South China Devonian tectonic patter...