| Autor: |
Buchko, I.V., Sorokin, A.A., Izokh, A.E., Larin, A.M., Kotov, A.B., Sal’nikova, E.B., Velikoslavinskii, S.D., Sorokin, A.P., Yakovleva, S.Z., Plotkina, Yu.V. |
| Předmět: |
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| Zdroj: |
Russian Geology & Geophysics; Aug2008, Vol. 49 Issue 8, p570-581, 12p |
| Abstrakt: |
Abstract: Three zones of layered series — lower, middle, and upper — composed of dunites and plagiodunites, troctolites and olivine gabbros, gabbros and gabbronorites, respectively, have been recognized in the Luchina massif. The melt that produced the massif rocks was of picrite-basaltic composition (15–16% MgO), and its crystallization took place at 1300–1000 °C and ∼7 kbar. The Early Mesozoic age (248±1 Ma), geochemistry, and location of the massif on the northern periphery of the eastern segment of the Mongolo-Okhotsk fold belt suggest that it formed either in the hinterland of subduction zone dipping beneath the southern margin of the Dzhugdzhur-Stanovoy superterrane or on the periphery of the Siberian superplume during the mantle heating. [Copyright &y& Elsevier] |
| Databáze: |
Supplemental Index |
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