CHENG Guo-fan1, HE Ying2
(1. Guizhou Institute of Technology, Guiyang 550005, China;
2. Guizhou Branch of China National Gold Group Corporation, Guiyang 550005, China)
Abstract: The Banqi secondary phosphate deposit was found through geological prospecting recently. Ore-bodies exist in ancient caves and Quaternary residual deposits from platform edge of Permian Wujiaping Formation reef limestone. Besides, they can be subdivided into caves 2 genetic sub-types, accumulation types and weathering-leaching residue type. Based on primary data from geological investigation report, in this paper the geological background and ore-deposit characteristics were described and the ore forming conditions were also discussed. Meantime, descriptive ore forming model was established as well. By contrasting with the phosphate deposits from central Tennessee in USA, a new type phosphate deposit was proposed in the research. A new distribution area of caves accumulation type phosphate deposits was pointed out in the Southern China and some new data were provided for further studies on ore forming conditions and its mechanism of secondary phosphate deposits in the Southern China.
Key words: secondary phosphate deposit; ore forming condition; ore forming model; Ceheng; Guizhou; China
ACTA MINERALOGICA SINICA Vol. 36, No. 2, 2016, Page 189-197