Chemical composition and age of metamorphic rocks from the Khavyven Highland, Eastern Kamchatka ...
Metamorphic rocks of the Khavyven Highland in eastern Kamchatka were determined to comprise two complexes of metavolcanic rocks that have different ages and are associated with subordinate amounts of metasediments. The complex composing the lower part of the visible vertical section of the highland...
| Main Authors: | , , |
|---|---|
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
PANGAEA
2007
|
| Subjects: | |
| Online Access: | https://dx.doi.org/10.1594/pangaea.788035 https://doi.pangaea.de/10.1594/PANGAEA.788035 |
| Summary: | Metamorphic rocks of the Khavyven Highland in eastern Kamchatka were determined to comprise two complexes of metavolcanic rocks that have different ages and are associated with subordinate amounts of metasediments. The complex composing the lower part of the visible vertical section of the highland is dominated by leucocratic amphibole-mica (+/-garnet) and epidote-mica (+/-garnet) crystalline schists, whose protoliths were andesites and dacites and their high-K varieties of island-arc calc-alkaline series. The other complex composing the upper part of the vertical section consists of spilitized basaltoids transformed into epidote-amphibole and phengite-epidote-amphibole green schists, which form (together with quartzites, serpentinized peridotites, serpentinites, and gabbroids) a sea-margin ophiolitic association. High LILE concentrations, high K/La, Ba/Th, Th/Ta, and La/Nb ratios, deep Ta-Nb minima, and low (La/Yb)_N and high 87Sr/86Sr ratios of the crystalline schists of the lower unit are demonstrated to ... : Supplement to: Tararin, L A; Badredinov, Z G; Dril', SI (2007): Geochemistry and age of metamorphic rocks of the Khavyven Highland, Eastern Kamchatka. Translated from Geokhimiya, 2007, No. 9, pp. 962-980, Geochemistry International, 45(9), 882-899 ... |
|---|