Abstract To investigate the effect of carbon-bearing phases on release fluids in subducted serpentinites, we performed high-pressure multi-anvil experiments representative ophicarbonate assemblages over a pressure range from 2.5 GPa to 5 and 450 °C 900 °C, across antigorite-out reaction. Parallel were carbonate-free serpentinites. In all experiments, monitored and/or controlled oxygen fugacity....

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...