z-logo
Premium
Molybdenum Mass Fractions and Stable Isotope Compositions of Sedimentary Carbonate and Silicate Reference Materials
Author(s) -
Gaspers Natalie,
Magna Tomáš,
Ackerman Lukáš
Publication year - 2020
Publication title -
geostandards and geoanalytical research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.037
H-Index - 73
eISSN - 1751-908X
pISSN - 1639-4488
DOI - 10.1111/ggr.12314
Subject(s) - carbonatite , silicate , geology , carbonate , geochemistry , dolomite , provenance , sedimentary rock , organic matter , mineralogy , sediment , pyrite , environmental chemistry , chemistry , paleontology , organic chemistry , mantle (geology)
A double‐spike method in combination with MC‐ICP‐MS was applied to obtain molybdenum (Mo) mass fractions and stable isotope compositions in a suite of sedimentary silicate (marine, lake, stream, estuarine, organic‐rich sediment, shales, slate, chert) and carbonate reference materials (coral, dolomite, limestones, carbonatites), and a manganese nodule reference material, poorly characterised for stable Mo isotope compositions. The Mo contents vary between 0.076 and 364 μg g −1 , with low‐Mo mass fractions (< 0.29 μg g −1 ) found almost exclusively in carbonates. Intermediate Mo contents (0.73–2.70 μg g −1 ) are reported for silicate sediments, with the exception of chert JCh‐1 (0.24 μg g −1 ), organic‐rich shale SGR‐1b (36.6 μg g −1 ) and manganese nodule NOD‐A‐1 (364 μg g −1 ). The Mo isotope compositions (reported as δ 98 Mo relative to NIST SRM 3134) range from −1.77 to 1.03‰, with the intermediate precision varying between ± 0.01 and ± 0.12‰ (2 s ) for most materials. Low‐temperature carbonates show δ 98 Mo values ranging from 0.21 to 1.03‰ whereas δ 98 Mo values of −1.77 and −0.17‰ were obtained for carbonatites CMP‐1 and COQ‐1, respectively. Silicate materials have δ 98 Mo values varying from −1.56 to 0.73‰. The range of δ 98 Mo values in reference materials may thus reflect the increasingly important relevance of Mo isotope investigations in the fields of palaeoceanography, weathering, sedimentation and provenance, as well as the magmatic realm.

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here