Abstract A comprehensive mineralogical, geochemical and isotopic review of six ultramafic-alkaline-carbonatite magmatic intrusions the Shillong Plateau (Sung Valley, Jasra, Swangkre-Rongjeng, Mawpyut) Mikir Hills (Samchampi-Samteran Barpung) is presented here, using published data. These emplaced ca. 115–102 Ma ago, thus are significantly younger than tholeiitic flood basalts erupted in Rajmaha...

The Nedamo Belt in the Kitakami Massif, NE Japan, contains early Carboniferous and Early Triassic accretionary complexes. Tectonic blocks containing plutonic rocks, ultramafic rocks high-P/T schists occur these complexes characterize Belt. comprise hornblende gabbro quartz diorite, they have been identified at more than 50 localities. U-Pb dating of zircon from diorite using inductively coupled...

The mineralogical indices the Quartz Index (QI), Carbonate Index (CI) and Mafic Index (MI) for ASTER multispectral thermal infrared (TIR) data were applied to various geological materials for regional lithological mapping on the Tibetan Plateau. Many lithological and structural features are not currently well understood in the central Tibetan Plateau, including the distribution of mafic-ultrama...

-Chloritic veins in serpentinite and their weathering products were analyzed by X-ray powder diffraction (XRD) and X-ray fluorescence spectrometry (XRF). Chlorite formed during the Hercynianage orogenesis had apparently been partly transformed to high-charge vermiculite during subsequent metamorphism of the rocks. The idealized structural formulae for these minerals are (mlL9Fea+0.zFe2+o.4Mg9.2...

This article reports new geochemical, Sr-Nd-Hf-Pb and Re-Os data on the rocks of Middle Paleoproterozoic (1.99 Ga) Tiksheozero ultramafic-alkaline-carbonatite complex confined to northeastern margin Karelian Craton. We focus poorly studied silicate rocks. Based petrographic geochemical research, are subdivided into two groups: an ultramafic-mafic series depleted in REE, other incompatible eleme...