LATE MESOZOIC MAGMATISM OF THE BORGOI DEP RESSION IN WESTERN TRANSBAIKALIA - (AGE AND COMPOSITION)

Authors
VORONTSOV AA YARMOLYUK VV IVANOV VG SMIRNOV VN
Citation
Aa. Vorontsov et al., LATE MESOZOIC MAGMATISM OF THE BORGOI DEP RESSION IN WESTERN TRANSBAIKALIA - (AGE AND COMPOSITION), Geologia i geofizika, 38(8), 1997, pp. 1305-1314
Citations number
17
Journal title
Geologia i geofizika → ACNP
ISSN journal
00167886
Volume
38
Issue
8
Year of publication
1997
Pages
1305 - 1314
Database
ISI
SICI code
0016-7886(1997)38:8<1305:LMMOTB>2.0.ZU;2-G
Abstract
Alkali-basic Early-Cretaceous magmatism of the Borgoi Depression, West ern Transbaikalia, has been characterized in terms of age and composit ion. On the basis of original and literature datings in the age interv al 102.8-136 Ma, four stages of magmatic activity have been recognized . The geological structure of the depression is much improved, especia lly, as applied to the final stages of magmatism. Regularities of the change of high-alkaline rock compositions in time and dynamics of the evolution of the Borgoi Depression.