Cenozoic volcanic and petrochemical provinces of Mainland Asia
Abstract
Mainland Asia has been subdivided into 14 distinct volcanic petrochemical provinces. Alkaline rocks form about 88% of the extrusive materials. Potassic basalts form 62% of the basaltic "clan". Andesitic rocks are relatively uncommon except near the seaboard and in Tibet. Peralkaline rocks are found in Korea and neighboring parts of China. The majority of the potassic basalt appear to be derived by variable degrees of partial melting of a mantle with lateral compositional heterogeneity. The peak of volcanic activity was during the Miocene and corresponded to the collision of the Indian continent and the development of back-arc basins.
- Publication:
-
Journal of Volcanology and Geothermal Research
- Pub Date:
- December 1983
- DOI:
- 10.1016/0377-0273(83)90110-5
- Bibcode:
- 1983JVGR...19..193W