The application of chemical staining to separate calcite and aragonite minerals for micro-scale isotopic analyses

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Authors:Kato, Kazuhiro; Wada, Hideki; Fujioka, Kantaro
Author Affiliations:Primary:
Shizuoka University, Graduate School of Science and Technology, Shizuoka, Japan
Frontier Research Program for Extremophiles, Japan
Volume Title:Geochemical Journal
Source:Geochemical Journal, 37(2), p.291-297. Publisher: Geochemical Society of Japan, Nagoya, Japan. ISSN: 0016-7002
Publication Date:2003
Note:In English. 13 refs.; illus.
Summary:Staining is a useful laboratory tool for distinguishing specific carbonate minerals from a mixture of carbonates. Feigl's and Meigen's solutions are commonly used to distinguish aragonite from other carbonates. Feigl's solution stains the aragonite surface black and Meigen's stains purple, whereas the coexisting calcite remains no change in color with either solutions. Both methods were applied to an authigenically precipitated carbonate chimney and a recrystallized metamorphic marble. Meigen's solution was favorable to stain fine and euhedral aragonites, but not effective for recrystallized aragonites. Feigl's solution was applicable to identify both types of aragonites. As a sample that demonstrates application of the Meigen's solution, isotopic analyses were carried out on aragonite and calcite separated from the seepage carbonate chimney collected from the Conical seamount of the Mariana forearc.
Sections:Apparatus and techniques
Subsections:Analytical geochemistry
Subjects:Applications; Aragonite; Calcite; Carbonates; Color; Isotope ratios; Isotopes; Methods; O-18/O-16; Oxygen; Precipitation; Recrystallization; SEM data; Stable isotopes; X-ray diffraction data; Conical Seamount; Izu-Bonin Arc; North Pacific; Northwest Pacific; Pacific Ocean; West Pacific; Feigl's solution; Mariana Forearc; Meigen's solution
Abstract Numbers:05M/2169
Record ID:2006010294
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute.
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