publication . Article . Other literature type . Conference object . 2018

Timing and mechanism of the rise of the Shillong Plateau in the Himalayan foreland

P. Van Der Beek; Yani Najman; Alex Copley; Ian L. Millar; Djordje Grujic; Gwladys Govin; Pascale Huyghe; Jesse Davenport;
Open Access English
  • Published: 24 Jan 2018
  • Country: United Kingdom
Abstract
Island arcs provide insights into the origin and recycling of continental crust, but questions remain concerning source metasomatism, the depth of differentiation, the potential role of amphibole fractionation, and the time scales involved. Basaltic andesites on Batan Island (Philippines) contain ≥150 Ma peridotite fragments encased in hornblendite and gabbroic rinds produced via melt-rock reaction. The peridotites have some of the lightest δ7Li and δ57Fe values yet measured in mantle rocks. These values are too fractionated to have been created solely by equilibrium partial melting and thus require a combination of melt depletion and slab fluid addition and may...
Subjects
free text keywords: Geology, sub-02, Basalt, Petrology, Amphibole, Metasomatism, Continental crust, Island arc, Partial melting, Peridotite, Magma
Funded by
EC| ITECC
Project
ITECC
Investigating Tectonism-Erosion-Climate-Couplings
  • Funder: European Commission (EC)
  • Project Code: 316966
  • Funding stream: FP7 | SP3 | PEOPLE
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