Matukhin,R.G. and Boiko,N.I.(2011): Paragenesis of Upper Cretaceous titanium-zirconium placers and phosphate mineralization in the southern East European Platform. Lithology and Mineral Resources, 46(4), 301-304.

『東ヨーロッパプラットホーム南部における白亜紀上部のチタン−ジルコニウム砂鉱の共生関係とリン酸塩の鉱化作用』

『Abstract
　Association of titanium-zirconium placers and phosphate mineralization in Upper Cretaceous rocks of the East European Platform is shown with the Tsentral'noe (Central) and Unecha deposits as example. This paragenesis is caused by interaction between the multicomponent placer ore (phosphate - rare metal) concentrations and mechanical-chemical differentiation that shows up periodically during the subaerial migration of sedimentary material. Clastic ore components were mainly derived from intermediate collectors, while the phosphate material was delivered by the phosphate-containing solutions and particulates in the chemical weathering crust. Such phosphorite-titanium-zirconium occurrences can also be detected in other regions, including areas with rare metal placers.』

(Introduction)
Formulation of problem
Characteristics of the Upper Cretaceous phosphate - rare metal paragenetic associations
Formation conditions of the Upper Cretaceous phosphate-bearing titanium-zirconium placers
Conclusions
References

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