Journal article
Genesis of the Paleoproterozoic Ammassalik Intrusive Complex, south-east Greenland
E Lebrun, TB Árting, J Kolb, M Fiorentini, T Kokfelt, AB Johannesen, R Maas, N Thébaud, LAJ Martin, RC Murphy
Precambrian Research | ELSEVIER SCIENCE BV | Published : 2018
Abstract
The Paleoproterozoic Ammassalik Intrusive Complex of south-east Greenland is located at the margin between the Rae Craton to the north and the North Atlantic Craton to the south. The complex is part of the Nagssugtoqidian Mobile Belt emplaced at mid- to lower-crustal level and represents an eastward continuation of the Nagssugtoqidian Orogen of western Greenland. We present new whole-rock geochemical and isotopic data (whole-rock Rb-Sr, Sm-Nd, U-Pb, Lu-Hf and zircon U-Pb, Lu-Hf, O) acquired from the Ammassalik Intrusive Complex, with the aim of reassessing its petrogenesis and evolution. The intrusive rocks and surrounding host-rocks show typical calc-alkaline signatures as well as negative ..
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Awarded by Nationale Geologiske Undersøgelser for Danmark og Grønland
Funding Acknowledgements
This project is funded by the Australian Research Council through the Future Fellowship awarded to MF and the Centre of Excellence for Core to Crust Fluid Systems (CCFS), Geological Survey of Denmark and Greenland (GEUS), and the Ministry of Mineral Resources of Greenland (MMR). The presented work is based on fieldwork in 2014 to south-east Greenland, which was organised and led by GEUS and co-financed by GEUS and MMR. The Lu-Hf analytical data were obtained using instrumentation funded by the Department of Education Science and Training (DEST) Systemic Infrastructure grants, ARC Linkage Infrastructure, Equipment and Facilities (LIEF), National Collaborative Research Infrastructure Strategy (NCRIS), industry partners, and Macquarie University. The U-Pb zircon geochronology was performed on the sensitive high-resolution ion microprobes at the John de Laeter Centre of Mass Spectrometry (Curtin University). The authors also acknowledge the facilities, and the scientific and technical assistance of the Australian Microscopy and Microanalysis Research Facility at the Centre for Microscopy, Characterisation and Analysis, the University of Western Australia. This is a facility funded by the University, State and Commonwealth Governments. This is contribution 1187 from the ARC Centre of Excellence for Core to Crust Fluid Systems (http://www.ccfs.mq.edu.au) and 1241 in the GEMOC Key Centre (http://www.gemoc.mq.edu.au) and is related to IGCP-662. Dr. Raphael Doutre and Dr. Anthony Kemp (University of Western Australia) are acknowledged for providing hours of inspiring conversations and stimulating discussions. Finally, thanks to Dr. Tapio Halkoaho, Prof. Kevin Ansdell and Dr. Natasha Wodicka who reviewed this paper.