Affiliation:
1. School of Geosciences, University of Aberdeen, Aberdeen AB24 3UE, UK
Abstract
The Lower Devonian plant-bearing Rhynie Chert, Aberdeenshire, UK, consists of sinters deposited by a hot spring system. Like many modern hot springs, the Rhynie geothermal system was lithium-rich, and its silica deposits are richer in lithium than other current or fossil sinters. Twenty samples of Rhynie sinter have a mean content of 255 ppm lithium. The high values imply exceptional lithium contents in the spring waters. Together with pegmatites and granites in the same region, the chert is related to a lithium-rich Late Caledonian magmatic suite, of which it is a surface expression. The measurements suggest that ancient hot spring deposits could provide valuable data during the exploration for lithium.
Supplementary material:
Supplementary Table 1 (compositional data for Late Caledonian granites) is available at
https://doi.org/10.6084/m9.figshare.c.6756506
Funder
National Centre for Earth Observation
Publisher
Geological Society of London
Subject
General Earth and Planetary Sciences,Geochemistry and Petrology,General Environmental Science,General Chemistry
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