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Stable Carbon and Oxygen Isotopes of Early Silurian Pentameride Brachiopods from Quebec, Ontario, and Nunavut, and Paleoenvironmental Implications.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Stable Carbon and Oxygen Isotopes of Early Silurian Pentameride Brachiopods from Quebec, Ontario, and Nunavut, and Paleoenvironmental Implications./
Author:	Siewnarine, Jordan N.
Description:	1 online resource (172 pages)
Notes:	Source: Masters Abstracts International, Volume: 84-04.
Contained By:	Masters Abstracts International84-04.
Subject:	Oceans. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29404718click for full text (PQDT)
ISBN:	9798352649121

Stable Carbon and Oxygen Isotopes of Early Silurian Pentameride Brachiopods from Quebec, Ontario, and Nunavut, and Paleoenvironmental Implications.
Siewnarine, Jordan N.

Stable Carbon and Oxygen Isotopes of Early Silurian Pentameride Brachiopods from Quebec, Ontario, and Nunavut, and Paleoenvironmental Implications. - 1 online resource (172 pages)

Source: Masters Abstracts International, Volume: 84-04.

Thesis (M.Sc.)--The University of Western Ontario (Canada), 2022.

Includes bibliographical references

Analysis of low-Mg calcite brachiopod shells for δ 18O and δ 13C signatures provide quantitative independent geochemical data for paleoenvironmental interpretations. We analyzed 59 brachiopod shells from lower Silurian carbonate rocks of Anticosti Island, the Hudson Bay Lowlands and Niagara regions for spaciotemporal isotopic trends for the early Silurian. Screening tests using scanning electron microscopy, cathodoluminescence and trace element analysis demonstrate exceptional preservation, suggesting retention of primary isotopic values. δ 13C and δ 18O values of shells range from 0.2‰ to 2.9‰ and -6.9‰ to -4.3‰ (VPDB), respectively. Temporally, increases in δ 13C and δ 18O values occurred in response to the Late Aeronian glaciation. Paleogeographically, δ 18O values were not significantly different between regions while δ 13C was tied to open ocean vs epeiric sea settings. We argue for ocean δ 18O value of ~ -1.5‰ (VSMOW), producing paleotemperatures of 30 °C to 36 ⁰C, consistent with the proposition that ocean δ 18O has remained constant over geologic time.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798352649121Subjects--Topical Terms:

561029
Oceans.
Index Terms--Genre/Form:

542853
Electronic books.

Stable Carbon and Oxygen Isotopes of Early Silurian Pentameride Brachiopods from Quebec, Ontario, and Nunavut, and Paleoenvironmental Implications.
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245 1 0 $a Stable Carbon and Oxygen Isotopes of Early Silurian Pentameride Brachiopods from Quebec, Ontario, and Nunavut, and Paleoenvironmental Implications.
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500 $a Source: Masters Abstracts International, Volume: 84-04.
500 $a Advisor: Jisuo, Jin; Webb, Elizabeth.
502 $a Thesis (M.Sc.)--The University of Western Ontario (Canada), 2022.
504 $a Includes bibliographical references
520 $a Analysis of low-Mg calcite brachiopod shells for δ 18O and δ 13C signatures provide quantitative independent geochemical data for paleoenvironmental interpretations. We analyzed 59 brachiopod shells from lower Silurian carbonate rocks of Anticosti Island, the Hudson Bay Lowlands and Niagara regions for spaciotemporal isotopic trends for the early Silurian. Screening tests using scanning electron microscopy, cathodoluminescence and trace element analysis demonstrate exceptional preservation, suggesting retention of primary isotopic values. δ 13C and δ 18O values of shells range from 0.2‰ to 2.9‰ and -6.9‰ to -4.3‰ (VPDB), respectively. Temporally, increases in δ 13C and δ 18O values occurred in response to the Late Aeronian glaciation. Paleogeographically, δ 18O values were not significantly different between regions while δ 13C was tied to open ocean vs epeiric sea settings. We argue for ocean δ 18O value of ~ -1.5‰ (VSMOW), producing paleotemperatures of 30 °C to 36 ⁰C, consistent with the proposition that ocean δ 18O has remained constant over geologic time.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2023
538 $a Mode of access: World Wide Web
650 4 $a Oceans. $3 561029
650 4 $a Precipitation. $3 3680799
650 4 $a Surface water. $3 3685235
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650 4 $a Trace elements. $3 602273
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650 4 $a Sea level. $3 544062
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650 4 $a Analytical chemistry. $3 3168300
650 4 $a Aquatic sciences. $3 3174300
650 4 $a Canadian studies. $3 2122858
650 4 $a Chemical oceanography. $3 516760
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650 4 $a Paleoecology. $3 608789
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710 2 $a The University of Western Ontario (Canada). $3 1017622
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