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- Title
Non-traditional stable isotope signatures in geological matrices as a tool for interpreting environmental changes - a review.
- Authors
Fiket, Željka; Turk, Martina Furdek; Ivanić, Maja; Kniewald, Goran
- Abstract
The development of new analytical techniques enabled the precise determination of the expanded set of stable isotopes and provided new insight into existing geological issues. This review outlines recent studies of non-traditional isotope signatures in geological matrices, summarizing in one place, new data for the stable isotopes of Ca, Mg, Sr, Li, Ni, Cr, and Cu and their application in the interpretation of environmental processes. Although some, such as d44Ca and d26Mg, have previously been used to track changes in seawater chemistry throughout geological history, recent studies report their application as geochemical proxies of post-depositional processes. Similarly, isotopic signatures of strontium, previously used in radioactive isotope chronology, and d7Li, used in tracing plate subduction and crust/mantle material cycling, found a new application in studies of weathering patterns. The use of d53Cr and d 65Cu isotope signatures, on the other hand, reflects their fractionation under different redox conditions, whereas d60Ni, due to its adsorption and co-precipitation with sulfide species and Fe-Mn phases, is used in interpreting the contributions of different material sources. And while the isotopic signatures of all these elements indicate certain environmental conditions and processes (e.g. post-depositional processes, redox conditions, organic matter input, the contribution of sources, etc.), by combining them a more comprehensive insight into the investigated environment can be achieved.
- Subjects
STABLE isotopes; GEOCHEMISTRY; RADIOISOTOPES; CHROMIUM isotopes; COPPER isotopes; ISOTOPIC signatures; STRONTIUM
- Publication
Geologia Croatica, 2021, Vol 74, Issue 2, p177
- ISSN
1330-030X
- Publication type
Article
- DOI
10.4154/gc.2021.12