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Minerals 2017, 7(11), 204;

REE Incorporation into Calcite Individual Crystals as One Time Spike Addition

Department of Geosciences, Mississippi State University, Mississippi State, MS 39762, USA
ARC Centre of Excellence for Coral Reef Studies, The University of Western Australia, Crawley, WA 6009, Australia
Los Alamos National Laboratory, Los Alamos, NM 87545, USA
Author to whom correspondence should be addressed.
Received: 15 September 2017 / Revised: 21 October 2017 / Accepted: 22 October 2017 / Published: 26 October 2017
(This article belongs to the Special Issue Rare-Earth Carbonates)
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Experiments on the incorporation of trace elements into calcite were performed, and rare earth elements (REE) were used to mark the growth zones of individual crystals. Experiments were conducted at different pH (7.7 to 8.8) and temperatures (2 °C to 24.6 °C) in NH4Cl + CaCl2 solutions, where REE were rapidly consumed by growing calcite. LA-ICP-MS line-scans yielded the distribution of (REE/Ca)calcite within individual crystals in a manner consistent with the addition of REE into fluid. A sharp decrease of (REE/Ca)calcite toward the crystal edge suggests the fast depletion of (REE/Ca)fluid due to strong REE consumption by growing calcite. An attempt was made to estimate the lower limit of the partition coefficients between calcite and fluid using selected REE/Ca data within individual calcite crystals and the amount of REE added into fluid. View Full-Text
Keywords: calcite; rare earth; partitioning; LA-ICP-MS calcite; rare earth; partitioning; LA-ICP-MS

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Gabitov, R.I.; Sadekov, A.; Migdisov, A. REE Incorporation into Calcite Individual Crystals as One Time Spike Addition. Minerals 2017, 7, 204.

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