Rare Earth Elements in Mineral Deposits: Speciation in Hydrothermal Fluids and Partitioning in Calcite

<div>Chondrite-normalized REE profiles of calcite simulated in this study compared to natural calcite compositions from the Bear Lodge, WY, and Kerimasi, Tanzania, carbonatite REE deposits. The middle (M)REE- and HREE-enriched profiles are interpreted as hydrothermal calcite and the LREE-enriched profiles as magmatic calcite [<a href="/journals/geofluids/2018/5382480/#B76">31</a>, <a href="/journals/geofluids/2018/5382480/#B77">32</a>]. Chondrite data are from McDonough and Sun (1995) [<a href="/journals/geofluids/2018/5382480/#B3">3</a>].</div>

Geofluids

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Figure 6

Figure 6: Rare Earth Elements in Mineral Deposits: Speciation in Hydrothermal Fluids and Partitioning in Calcite 