Diamonds from the Nassau Mountains, Suriname

Journal article (2020)

Authors

Renoesha Naipal Universiteit Utrecht, Anton de Kom University of Suriname
J. C. H. Zwaan Naturalis Biodiversity Center
S.B. Kroonenberg Applied Geology - CEG , Anton de Kom University of Suriname
Leo M. Kriegsman Universiteit Utrecht, Naturalis Biodiversity Center
Paul R.D. Mason Universiteit Utrecht
Research Group
Applied Geology (CEG) (TU Delft)
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Published Date

2020

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Geoscience and Engineering

Research Group

Applied Geology

Abstract

Alluvial diamonds have been found in Suriname since the late 19th century, but to date the details of their origin remain unclear. Here we describe diamonds from Paramaka Creek (Nassau Mountains area) in the Marowijne greenstone belt, Guiana Shield, north-eastern Suriname. Thirteen samples were studied, consisting mainly of euhedral crystals with dominant octahedral and dodecahedral habits. They had colourless to brown to slightly greenish body colours, and some showed green or (less commonly) brown irradiation spots. Surface features showed evidence of late-stage resorption that occurred during their transport to the earth's surface. The studied diamonds were predominantly type IaAB, with nitrogen as both A and B aggregates. In the DiamondView most samples displayed blue and/or green luminescence and concentric growth patterns. Their mineral inclusion assemblages (forsterite and enstatite) indicate a peridotitic (possibly harzburgitic) paragenesis.