Dear Sir

I think the following links will benefit you in your search

http://www.brgm.eu/sites/default/files/mpc-book-of-abstracts_0.pdf

http://gssaconferences.co.za/Target%20Generation%20Presos/Session%201/Hunt%20JP.pdf

http://www.cugb.edu.cn/uploadCms/file/20600/papers_upload/20161013164324374609.pdf

Best Regards

Dear Mr. Saito,

As far as phosphate is concerned see the following paper: DILL, H.G. and KANTOR, W. (1997) Depositional environment, chemical facies and a tentative classification of some selected phosphate accumulations.- Geologisches Jahrbuch, D 105: 3-43.

As far as carbonatites and their involvement in element concentration are concerned see the following paper. With a simple search operation you will be successful as to the genetic and applied part of economic geology: DILL, H.G. (2010) The “chessboard” classification scheme of mineral deposits: Mineralogy and geology from aluminum to zirconium.- Earth Science Reviews, 100: 1-420.

Good luck !

H.G.Dill

Fenites may be a promising exploration indicator for carbonatites. There's a review paper that came out in 2017 in Ore Geology Reviews by Holly Elliott et al about that. Its open access so you can freely download it here:

Article Fenites associated with carbonatite complexes: A review