摘要
鄂西-黔中陆缘坻是扬子地块东南缘晚震旦世陡山沱期磷块岩沉积成矿的构造古地理单元,其形态是向南东凸出的弧形,来自SE方向上升洋流抵达陆缘坻后,分成向NW和SW向两个方向洋流,磷块岩两个工业矿层随洋流方向发生有规律的迁移沉积,这在同一矿集区的不同矿段也表现出清晰的迁移沉积规律。由于陆缘坻本身古构造和古地形特点,决定了磷块岩成矿的具体位置,构成了不同的控矿模型,特别陆缘坻基底隆起迎向洋流的一侧是磷块岩大规模成矿的最佳地段,往往形成成群的大中小矿床,甚至形成超大型矿床。
The epicontinental Chi is a tectonic palaeogeographic unit for sedimentary mineralization on the southeastern margin of Yangtze block of Doushantuo period in late Sinian, and its shape is an arc protruding southeastward, and the rising ocean current from the direction of SE reaches the epicontinental Chi, It is divided into two directions of ocean current: NW and SW, and the two industrial ore beds of phosphate rock have regular migration and deposits along with ocean current direction, which also shows clear rules of migration and deposition in different ore domains in the same ore concentration area. Because of the characteristics of the paleo-structure and the paleo-topography of the epicontinental Chi, the ore-forming position of the phosphate rock is determined and different ore-controlling models are formed. In particular, the best area of large-scale ore-forming of phosphate rock is on the side of the epicontinental Chi uplift facing to the ocean current. Large, small and medium-sized deposits are often formed in groups, and even super-large deposits are formed.
作者
东野脉兴
朱熙槐
王淑丽
Dongye Maixing;Zhu Xihuai;Wang Shuli(Geological Institute of China Chemical Geology and Mine Bureau,Zhuozhou,Hebei,072750;Hubei Geological Prospecting Institute of China Chemical Geology and Mine Bureau,Wuhan,Hubei,430080)
出处
《化工矿产地质》
CAS
2019年第1期8-13,共6页
Geology of Chemical Minerals
