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Neoproterozoic ice ages, boron isotopes, and ocean acidification: Implications for a snowball Earth

Research output: Contribution to journalArticle

DOI

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Neoproterozoic ice ages, boron isotopes, and ocean acidification : Implications for a snowball Earth. / Kasemann, Simone A.; Prave, Tony; Fallick, Anthony E.; Hawkesworth, Chris; Hoffmann, Karl-Heinz.

In: Geology, Vol. 38, No. 9, 09.2010, p. 775-778.

Research output: Contribution to journalArticle

Harvard

Kasemann, SA, Prave, T, Fallick, AE, Hawkesworth, C & Hoffmann, K-H 2010, 'Neoproterozoic ice ages, boron isotopes, and ocean acidification: Implications for a snowball Earth' Geology, vol. 38, no. 9, pp. 775-778. https://doi.org/10.1130/G30851.1

APA

Kasemann, S. A., Prave, T., Fallick, A. E., Hawkesworth, C., & Hoffmann, K-H. (2010). Neoproterozoic ice ages, boron isotopes, and ocean acidification: Implications for a snowball Earth. Geology, 38(9), 775-778. https://doi.org/10.1130/G30851.1

Vancouver

Kasemann SA, Prave T, Fallick AE, Hawkesworth C, Hoffmann K-H. Neoproterozoic ice ages, boron isotopes, and ocean acidification: Implications for a snowball Earth. Geology. 2010 Sep;38(9):775-778. https://doi.org/10.1130/G30851.1

Author

Kasemann, Simone A. ; Prave, Tony ; Fallick, Anthony E. ; Hawkesworth, Chris ; Hoffmann, Karl-Heinz. / Neoproterozoic ice ages, boron isotopes, and ocean acidification : Implications for a snowball Earth. In: Geology. 2010 ; Vol. 38, No. 9. pp. 775-778.

Bibtex - Download

@article{902c49493334483f9d5562f992e7b231,
title = "Neoproterozoic ice ages, boron isotopes, and ocean acidification: Implications for a snowball Earth",
abstract = "The Neoproterozoic Earth underwent at least two severe glaciations, each extending to low paleomagnetic latitudes and punctuating warmer climates. The two widespread older and younger Cryogenian glacial deposits in Namibia are directly overlain by cap carbonates deposited under inferred periods of high atmospheric carbon dioxide concentrations. Oceanic uptake of carbon dioxide decreases ocean pH; here we present a record of Cryogenian interglacial ocean pH, based on boron ( B) isotopes in marine carbonates. Our data suggest a largely constant ocean pH and no critically elevated pCO(2) throughout the older postglacial and interglacial periods. In contrast, a marked ocean acidification event marks the younger deglaciation period and is compatible with elevated postglacial pCO(2) concentration. Our data are consistent with the presence of two panglacial climate states in the Cryogenian, but indicate that each had its own distinct environmental conditions.",
keywords = "CARBON, CHEMISTRY, CONSTRAINTS, GLACIATION, TRANSITION, CALCIUM, NAMIBIA, PH",
author = "Kasemann, {Simone A.} and Tony Prave and Fallick, {Anthony E.} and Chris Hawkesworth and Karl-Heinz Hoffmann",
year = "2010",
month = "9",
doi = "10.1130/G30851.1",
language = "English",
volume = "38",
pages = "775--778",
journal = "Geology",
issn = "0091-7613",
publisher = "GEOLOGICAL SOC AMER, INC",
number = "9",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Neoproterozoic ice ages, boron isotopes, and ocean acidification

T2 - Geology

AU - Kasemann, Simone A.

AU - Prave, Tony

AU - Fallick, Anthony E.

AU - Hawkesworth, Chris

AU - Hoffmann, Karl-Heinz

PY - 2010/9

Y1 - 2010/9

N2 - The Neoproterozoic Earth underwent at least two severe glaciations, each extending to low paleomagnetic latitudes and punctuating warmer climates. The two widespread older and younger Cryogenian glacial deposits in Namibia are directly overlain by cap carbonates deposited under inferred periods of high atmospheric carbon dioxide concentrations. Oceanic uptake of carbon dioxide decreases ocean pH; here we present a record of Cryogenian interglacial ocean pH, based on boron ( B) isotopes in marine carbonates. Our data suggest a largely constant ocean pH and no critically elevated pCO(2) throughout the older postglacial and interglacial periods. In contrast, a marked ocean acidification event marks the younger deglaciation period and is compatible with elevated postglacial pCO(2) concentration. Our data are consistent with the presence of two panglacial climate states in the Cryogenian, but indicate that each had its own distinct environmental conditions.

AB - The Neoproterozoic Earth underwent at least two severe glaciations, each extending to low paleomagnetic latitudes and punctuating warmer climates. The two widespread older and younger Cryogenian glacial deposits in Namibia are directly overlain by cap carbonates deposited under inferred periods of high atmospheric carbon dioxide concentrations. Oceanic uptake of carbon dioxide decreases ocean pH; here we present a record of Cryogenian interglacial ocean pH, based on boron ( B) isotopes in marine carbonates. Our data suggest a largely constant ocean pH and no critically elevated pCO(2) throughout the older postglacial and interglacial periods. In contrast, a marked ocean acidification event marks the younger deglaciation period and is compatible with elevated postglacial pCO(2) concentration. Our data are consistent with the presence of two panglacial climate states in the Cryogenian, but indicate that each had its own distinct environmental conditions.

KW - CARBON

KW - CHEMISTRY

KW - CONSTRAINTS

KW - GLACIATION

KW - TRANSITION

KW - CALCIUM

KW - NAMIBIA

KW - PH

UR - http://www.scopus.com/inward/record.url?scp=77958095296&partnerID=8YFLogxK

U2 - 10.1130/G30851.1

DO - 10.1130/G30851.1

M3 - Article

VL - 38

SP - 775

EP - 778

JO - Geology

JF - Geology

SN - 0091-7613

IS - 9

ER -

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ID: 3769893