On the types of phosphate deposit in northern China band direction for ore finding

Abstract：This research was based on the study of the data of phosphate deposits of northern China, which was a part of the “Project of Atlas Compilation by Five Countries' Geologists (China, Russia, Kazakhstan, Mongolia, and the Republic of Korea)”. Phosphate deposits in northern China may be divided into the sedimentary type, metamorphosed sedimentary type and magmatic type. Sedimentary phosphate deposits mainly formed in the late Sinian Doushantuoan period and Early and Middle Cambrian, and phosphate is mainly of marine organic origin. Metamorphosed sedimentary phosphate deposits mainly occurred in the Mesoproterozoic, and phosphate is mainly volcanic phosphate, possibly also mixed with organic phosphate. Both sedimentary and metamorphosed sedimentary types contain phosphate transported into the basin due to terrestrial weathering. Magmatic phosphate deposits are mainly related to Hercynian and Caledonian ultramafic magmatic rocks, and they form a mineralogenetic series together with iron vanadium and titanium. Attention should be paid to looking for sedimentary phosphate deposits in Sinian and Lower Cambrian strata on the southern margin of the North China platform and in Lower Cambrian strata on the northern margin of the Tarim block, while metamorphosed sedimentary phosphate deposits are promising on the northern margin of North China. For magmatic phosphate deposits it is necessary to carry out exploration in Caledonian and Hercynian ultramafic rocks.