Origin of Cenomanian nodular phosphorites in the Dnieper-Donets Depression (paleogeographic aspect)

被引:5
|
作者
Kholodov, V. N. [1 ]
机构
[1] Russian Acad Sci, Inst Geol, Moscow 119017, Russia
基金
俄罗斯基础研究基金会;
关键词
D O I
10.1134/S0024490206050014
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
Paleogeographic settings of the Dnieper-Donets Depression are discussed with consideration of its Cenomanian provenance, land-sea proportions, and paleoclimate. The role of the Jurassic-Cretaceous weathering crust that stimulated the formation of phosphate solutions and the accumulation of apatite-ilmenite placer deposits is emphasized. Based on global regularities in the phosphorite formation, it is stated that weathered areas of adjacent land, rather than the World Ocean, represented the main source of phosphorus in ancient platform basins.
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页码:401 / 416
页数:16
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