Isotope Applied in Palaeogeography and Palaeoclimatology

A special issue of Geosciences (ISSN 2076-3263). This special issue belongs to the section "Climate".

Deadline for manuscript submissions: closed (28 February 2022) | Viewed by 9150

Special Issue Editors


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Guest Editor
Polish Geological Institute – National Research Institute, 00–975 Warszawa, Poland
Interests: carbonate and evaporite sedimentology; stratigraphy; petroleum geology; isotope geology; palaeogeography; palaeoclimatology
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Guest Editor
Polish Geological Institute – National Research Institute, Rakowiecka 4, 00-975 vWarszawa, Poland
Interests: isotope geochemistry; sedimentology; diagenesis
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue of Geosciences aims to present recent advances in the application of stable isotopes in various fields of paleoclimate and paleogeography research. Past climates left their signatures in sediment records worldwide. In particular, this refers to the isotopic composition of elements that constitute biogenic and inorganic components of sedimentary rocks. For example, it is widely known that oxygen isotopes in ancient carbonates enable reconstruction of paleotemperatures and strontium isotopes are not only a tool for global stratigraphy but also provide information on paleoenvironmental conditions (marine versus non-marine). In general, stable isotope records are successfully used for investigating various ancient continental and marine settings. Knowing the various paleoclimatic parameters (temperature, humidity, etc.), one can infer paleogeography on a global or regional scale. Papers covering, but not limited to, the following topics are welcomed for submission to this Special Issue:

  • Paleothermometry – conventional and clumped oxygen isotopes;
  • Paleoaltimetry and evolution of landscapes using oxygen isotopes in authigenic minerals of continental sediments;
  • Carbon isotopes as paleoclimatic indicator;
  • Carbon isotopes in the global carbon cycle, its long-run changes and short-term disturbances in the geologic past – paleoclimate implications;
  • Isotopes (e.g. Si, Mg, Ca, Li, U) as a proxy for continental weathering and paleoclimate and paleogeographic reconstructions;
  • Isotopes of various elements in continental environments (lake sediments, paleosols, speleothems);
  • Isotopes as a proxy in paleogeographic reconstruction (ocean circulation, seaways connections, etc.).

Dr. Tadeusz Peryt
Dr. Marek Jasionowski
Guest Editors

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Published Papers (2 papers)

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Research

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15 pages, 3683 KiB  
Article
Oxygen Isotopes from Apatite of Middle and Late Ordovician Conodonts in Peri-Baltica (The Holy Cross Mountains, Poland) and Their Climatic Implications
by Wiesław Trela, Ewa Krzemińska, Karol Jewuła and Zbigniew Czupyt
Geosciences 2022, 12(4), 165; https://doi.org/10.3390/geosciences12040165 - 7 Apr 2022
Cited by 6 | Viewed by 3108
Abstract
This report provides oxygen isotopes from apatite of late Middle and Late Ordovician conodonts from the southern Holy Cross Mountains in south-eastern Poland. It was a unique time interval characterised by a significant change in the Ordovician climate, tectonic, and ocean chemistry. In [...] Read more.
This report provides oxygen isotopes from apatite of late Middle and Late Ordovician conodonts from the southern Holy Cross Mountains in south-eastern Poland. It was a unique time interval characterised by a significant change in the Ordovician climate, tectonic, and ocean chemistry. In the Middle and early Late Ordovician, the Holy Cross Mountains were located in the mid-latitude climatic zone at the southwestern periphery of Baltica; therefore, the δ18Oapatite values from this region provide new data on the 18O/16O budget in the Ordovician seawater reconstructed mainly from the tropical and subtropical realms. Oxygen isotopes from mixed conodont samples were measured using the SHRIMP IIe/MC ion microprobe in the Polish Geological Institute in Warsaw. The δ18Oapatite values range from 16.75‰VSMOW to 20.66‰VSMOW with an average of 18.48‰VSMOW. The oxygen isotopes from bioapatite of the studied section display an increasing trend, suggesting a progressive decrease in sea-surface temperature roughly consistent with an overall cooling of the Ordovician climate. Two distinctive positive excursions of δ18Oapatite have been reported in the upper Sandbian and middle Katian of the studied section and correlated with cooling events recognised in Baltica. They are interpreted as an isotope temperature proxy of climate changes triggered by a growing continental polar ice cap, but increased δ18Oapatite in the late Sandbian contradicts recently postulated climate warming during that time in subtropical Laurentia. Full article
(This article belongs to the Special Issue Isotope Applied in Palaeogeography and Palaeoclimatology)
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Review

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44 pages, 6161 KiB  
Review
Advances and Challenges in Palaeoenvironmental Studies Based on Oxygen Isotope Composition of Skeletal Carbonates and Phosphates
by Hubert Wierzbowski
Geosciences 2021, 11(10), 419; https://doi.org/10.3390/geosciences11100419 - 9 Oct 2021
Cited by 9 | Viewed by 5286
Abstract
Oxygen isotopes are widely used in palaeoenvironmental and palaeoclimatic studies as they record variations in the precipitation temperature of biogenic carbonates and phosphates. Problems associated with the preservation state of fossils, selection of the proper temperature equation, vital effects occurring during biomineralization, habitat [...] Read more.
Oxygen isotopes are widely used in palaeoenvironmental and palaeoclimatic studies as they record variations in the precipitation temperature of biogenic carbonates and phosphates. Problems associated with the preservation state of fossils, selection of the proper temperature equation, vital effects occurring during biomineralization, habitat effects of organisms as well as salinity, bathymetry and water circulation changes limit, however, the applicability of oxygen isotopes to reconstruction of ancient environmental settings. The progress of oxygen isotope studies, temperature calculations and ambiguities of the isotope record are discussed in this paper. The same applies to the methods of retrieving reliable temperature signals and the record of water chemistry changes based on well-preserved calcareous and phosphatic fossils. Sometimes neglected importance of sedimentological and faunistic data associated with sea-level changes and salinity variations is emphasised as an important tool for refinement of the temperature trends of epeiric sedimentary basins. In addition, published case datasets and new laboratory techniques, including micro-area and clumped isotope analyses, are presented to demonstrate examples and prospective ways of extension of the scope of palaeoenvironmental research. The provided information may be used in discussion and a critical review of published oxygen isotope data and their palaeoenvironmental interpretations. Full article
(This article belongs to the Special Issue Isotope Applied in Palaeogeography and Palaeoclimatology)
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