Mn(II) partitioning between calcium and magnesium sites in studies of dolomite origin

Details Mn(II) partitioning between calcium and magnesium sites in studies of dolomite origin Mn(II) partitioning between calcium and magnesium sites in studies of dolomite origin

Sep 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984gecoa..48.1861l&link_type=abstract

Geochimica et Cosmochimica Acta, Volume 48, Issue 9, p. 1861-1865.

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In an Electron Spin Resonance (ESR) study of over 30 dolomites, representing a variety of probable sedimentary origins, we observed a Mg-site to Ca-site ratio in the Mn distribution that suggests two groups of dolomite. In one group the dolomites have a Mn distribution ratio near 5.0 and an excess of Ca; in the other group the dolomites are near-stoichiometric but have a Mn distribution ratio that varies from near 5 to near 70. We suggest that these two groups reflect different origins for the dolomites. The wide variation in the manganese distribution ratio for the near-stoichiometric dolomites supplies a parameter against which other variables can be plotted in studies of dolomite origin.

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