Recent research activity

  • Origin and eruptive style of the Rajmahal felsic magmas: The Early Cretaceous Rajmahal-Sylhet flood basalts of eastern India constitute a part of a large igneous province related to the Kerguelen plume that includes the Kerguelen Plateau, Broken Ridge, parts of the southwestern margin of Australia, and perhaps the northern margin of east Antarctica.
  • Deccan tholeiitic primary magmas: A popular hypothesis suggests that the Cretacous-Paleogene Deccan flood basalts originated from a deep mantle plume. Reconstructions of the bulk compositions of the commonly occurring evolved Deccan tholeiites to their peridotite-equilibrated primary melts suggest that they last equilibrated with the mantle at ~8-13 kb and ~1268-1332 oC. Thus, the primary magmas were last equilibrated with the mantle at ~30-49 km depths near the Moho and their temperatures were not anomalously high.
  • Exhumation mechanism of the Tso Morari eclogite, northwestern Himalayas (part of a larger project on tectonic evolution of the western Himalayas, a collaborative study funded by MIT MISTI): The metamorphic P-T path of the Tso Morari eclogite indicates high-pressure heating that is only possible within the mantle wedge overlying the subducting slab. Hence the eclogite was exhumed from the slab to the upper crust as a diapir through the mantle wedge.

Research Topics