Journal
LITHOS
Volume 112, Issue -, Pages 1155-1166Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.lithos.2009.05.012
Keywords
Geothermobarometry; Diamond potential; Greenland; Mantle; Lithosphere; Peridotite
Categories
Funding
- NERC [NE/C519054/1] Funding Source: UKRI
- Natural Environment Research Council [NE/C519054/1] Funding Source: researchfish
Ask authors/readers for more resources
Geothermobarometry of primarily garnet lherzolitic xenoliths from several localities in southern West Greenland is applied to address the diamond potential, pressure and temperature distribution and the stratigraphy of the subcontinental lithospheric mantle similar to 600 Ma ago. The samples are from kimberlitic and ultramafic lamprophyre (senso lato) dikes and sills emplaced into three tectonically distinct crustal areas in the North Atlantic Craton. Several geothermobarometry formulations have been applied and a thorough assessment of which P-T combinations are most applicable to this sample suite has been conducted. No variation in P-T gradients between the three distinct crustal areas has been discerned. We find that the lithospheric mantle beneath this region extended to a depth of 215 km at the time of eruption, with a geotherm similar to those defined by peridotites from the Slave craton and the Kirkland Lake locality within the Superior craton. In supporting previous studies we find that the continental lithospheric mantle is layered and increases in fertility with depth. Twenty-five of 32 investigated samples are estimated to be derived from the diamond stability field that extends into the reworked Archean North of the Naqssugtoqidian deformation front. (C) 2009 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available