Journal article
Multiple mantle sources of continental magmatism: Insights from “high-Ti” picrites of Karoo and other large igneous provinces
VS Kamenetsky, R Maas, MB Kamenetsky, GM Yaxley, K Ehrig, GF Zellmer, IN Bindeman, AV Sobolev, DV Kuzmin, AV Ivanov, J Woodhead, JG Schilling
Chemical Geology | ELSEVIER SCIENCE BV | Published : 2017
Abstract
Magmas forming large igneous provinces (LIP) on continents are generated by extensive melting in the deep crust and underlying mantle and associated with break-up of ancient supercontinents, followed by formation of a new basaltic crust in the mid-oceanic rifts. A lack of the unifying model in understanding the sources of LIP magmatism is justified by lithological and geochemical complexity of erupted magmas on local (e.g. a cross-section) and regional (a single and different LIP) scales. Moreover, the majority of LIP rocks do not fit general criteria for recognizing primary/primitive melts (i.e. < 8 wt% MgO and absence of high-Fo olivine phenocrysts). This study presents the mineralogical (..
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Awarded by Alexander von Humboldt-Stiftung
Funding Acknowledgements
We thank P. Robinson, S. Gilbert, K. McGoldrick, and K. Goemann for help with analytical works. The final manuscript paper benefitted from thorough and helpful reviews by Chris Harris, Martina Elburg and Dejan Prelevie and editorial handling by Sebastian Tappe. This study was initially (2003-2005) supported by the Alexander von Humboldt Foundation (Germany) in the form of the Wolfgang Paul Award to A. Sobolev and the Friedrich Wilhelm Bessel Award to V. Kamenetsky. Recent financial support was provided by the Australian Research Council Research (Discovery grant DP1092823, 2010-2012) and University of Tasmania (New Star Professorship, 2010-2014) to V. Kamenetsky, and the Russian Science Foundation (grant No 16-17-10068) to A Ivanov.