Strontium isotope stratigraphy: potential resolution and event correlation

Veizer, Ján; Buhl, Dieter; Diener, Andreas; Ebneth, Stefan; Podlaha, Olaf G.; Bruckschen, Peter; Jasper, Torsten; Korte, Christoph; Schaaf, Michael; Ala, Davin; Azmy, Karem

doi:10.1016/s0031-0182(97)00054-0

Cited by 182 publications

(85 citation statements)

References 63 publications

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“…Strontium isotopic composition of well-preserved brachiopods from the Niagara Gorge area, as well as those from Anticosti Island, Gotland, Lithuania, Podolia and England , is our proxy of choice for global correlations of Silurian sedimentary sequences (Veizer et al, 1997;Brand et al, 2003;Brand, 2004). A definitive trend of increasing 87 Sr/ 86 Sr through time is evident in Fig.…”

Section: Strontium Isotope Chemostratigraphymentioning

confidence: 99%

“…Biochemostratigraphic research is making great strides in identifying and defining geological events, in particular those related to glacial and biotic phenomena (e.g., Brenchley et al, 1994;Marshall et al, 1997;Veizer et al, 1997Veizer et al, , 1999Azmy et al, 1998;Ruppel et al, 1998;Mii et al, 1999;Brand et al, 2004). Unfortunately, detailed stratigraphic information and biogeochemical data are still rare for many of these events, hindering elucidation of cause and effect relationships and resolution of the progression of temporal events.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of the Salinic I tectonic, Cancañiri glacial and Ireviken biotic events: Biochemostratigraphy of the Lower Siluriansuccession in the Niagara Gorge area, Canada and U.S.A.

Brand

Azmy

Veizer

2006

Palaeogeography, Palaeoclimatology, Palaeoecology

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Well-preserved brachiopods from the Niagara Gorge area, Anticosti Island, Britain, Gotland and Estonia were utilised to delineate a complex isotopic evolution for Llandovery-Wenlock seawater. The Sr-isotope record reflects the Salinic I tectophase of the Late Llandovery in the continuous increase in 87 Sr/ 86 Sr values from 0.708070 to 0.708346. The Salinic II tectophase is marked by relative constancy of Sr isotope values until the Late Wenlock when it rises from 0.708345 to 0.708430. The second tectonic phase was therefore likely only of a regional nature. The carbon isotopes during the Llandovery fall within a band of about − 1‰ to + 3‰, a range comparable to modern low-latitude brachiopods. A large positive δ 13 C excursion of about 3‰, identifies the Ireviken event/excursion, characterizes the Early Wenlock. The biotic crisis and the isotope excursion itself may be ultimately related to the onset and duration of the Cancañiri glaciation, although a direct causative scenario is as yet unknown. The oxygen isotopic trends of well-preserved brachiopods clearly reflect a warm climate interval during the latest Llandovery associated with the Silurian sea level highstand. Subsequently, in the Early Wenlock, the sea level fell with the onset of the Cancañiri glaciation in the southern hemisphere. This is reflected in a significant positive δ 18 O excursion, particularly in brachiopods from the Niagara Gorge area. Brachiopods from lower latitudes were awash in warm tropical currents and therefore exhibit somewhat more negative δ 18 O values, indicating a lesser cooling gradient.

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Section: Strontium Isotope Chemostratigraphymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of the Salinic I tectonic, Cancañiri glacial and Ireviken biotic events: Biochemostratigraphy of the Lower Siluriansuccession in the Niagara Gorge area, Canada and U.S.A.

Brand

Azmy

Veizer

2006

Palaeogeography, Palaeoclimatology, Palaeoecology

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“…The selected samples are low-Mg calcite shells of brachiopods, belemnites, and some carbonate matrices, mostly originating from 30°S to 30°N paleolatitudes . The investigation method and the preservation state of the samples are discussed in Diener et al (1996), Veizer et al (1997a), Veizer et al (1997b), Azmy et al (1998), Bruckschen et al (1999), andVeizer et al (1999). For this study we selected the best available samples from this database, with low Mg, Mn, and (for belemnites) Fe concentrations and with well clustered δ 18 O and 87 Sr/ 86 Sr ratios for coeval samples from the database; all indicating little diagenetic overprint (Bruhn et al, 1995;Veizer et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

“…Diagenetic alterations usually lead to a decline in Sr and an increase in Mn concentrations (Veizer et al, 1997b). 97% of our fossil brachiopod samples have Sr concentrations in the range of modern species (Table A4 and Fig.…”

Section: Introductionmentioning

confidence: 99%

The Phanerozoic δ88/86Sr record of seawater: New constraints on past changes in oceanic carbonate fluxes

Vollstaedt

Eisenhauer

Wallmann

et al. 2014

Geochimica et Cosmochimica Acta

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107

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The isotopic composition of Phanerozoic marine sediments provides important information about changes in seawater chemistry. In particular, the radiogenic strontium isotope ( 87 Sr/ 86 Sr) system is a powerful tool for constraining plate tectonic processes and their influence on atmospheric CO 2 concentrations. However, the 87 Sr/ 86 Sr isotope ratio of seawater is not sensitive to temporal changes in the marine strontium (Sr) output flux, which is primarily controlled by the burial of calcium carbonate (CaCO 3 ) at the ocean floor. The Sr budget of the Phanerozoic ocean, including the associated changes in the amount of CaCO 3 burial, is therefore only poorly constrained. Here, we present the first stable isotope record of Sr for Phanerozoic skeletal carbonates, and by inference for Phanerozoic seawater (δ 88/86 Sr sw ), which we find to be sensitive to imbalances in the Sr input and output fluxes. This δ 88/86 Sr sw record varies from ~0.25‰ to ~0.60‰ (vs. SRM987) with a mean of ~0.37‰. The fractionation factor between modern seawater and skeletal The oceanic net carbonate flux of Sr (F(Sr) carb ) varied between an output of -4.7x10 10 mol/Myr and an input of +2.3x10 10 mol/Myr with a mean of -1.6x10 10 mol/Myr.On time scales in excess of 100Myrs the F(Sr) carb is proposed to have been controlled by the relative importance of calcium carbonate precipitates during the "aragonite" and "calcite" sea episodes. On time scales less than 20Myrs the F(Sr) carb seems to be controlled by variable combinations of carbonate burial rate, shelf carbonate weathering and recrystallization, ocean acidification, and ocean anoxia. In particular, the Permian/Triassic transition is marked by a prominent positive δ 88/86 Sr sw -peak that reflects a significantly enhanced burial flux of Sr and carbonate, likely driven by bacterial sulfate reduction (BSR) and the related alkalinity production in deeper anoxic waters. We also argue that the residence time of Sr in the Phanerozoic ocean ranged from ~1Myrs to ~20Myrs.

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“…Under this perspective, general agreement exists in that low 87 Sr/ 86 Sr values have been associated to mid oceanic volcanic activity (outgassing) and to alteration of seafloor basalt, whereas high 87 Sr/ 86 Sr values have been associated mostly to continental weathering (Veizer et al 1997).…”

Section: Global Implications Of the Late Mesoproterozoic-early Neopromentioning

confidence: 96%

C- and Sr-isotope stratigraphy of the São Caetano complex, Northeastern Brazil: a contribution to the study of the Meso-Neoproterozoic seawater geochemistry

Silva

Sial

Ferreira

et al. 2005

An. Acad. Bras. Ciênc.

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C-isotope and 87 Sr/ 86 Sr values for five carbonate successions from the São Caetano Complex, northeastern Brazil, were used to constrain their depositional age and to determine large variations in the C-and Srisotopic composition of seawater under the framework of global tectonic events. Three C-isotope stages were identified from base to top in a composed chemostratigraphic section: (1) The C-and Sr-chemostratigraphic pathways permit to state: (a) the C-and Sr-isotope secular curves registered primary fluctuations of the isotope composition of seawater during late Mesoproterozoic-early Neoproterozoic transition in the Borborema Province, and (b) onset of the Cariris Velhos/Greenville cycle, widespread oceanic rifting, continental magmatic arc formation and onset of the agglutination of Rodinia supercontinent, mostly controlled the C-and Sr-isotope composition of seawater during the C-isotope stages 1, 2 and 3.

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Strontium isotope stratigraphy: potential resolution and event correlation

Cited by 182 publications

References 63 publications

Evaluation of the Salinic I tectonic, Cancañiri glacial and Ireviken biotic events: Biochemostratigraphy of the Lower Siluriansuccession in the Niagara Gorge area, Canada and U.S.A.

Evaluation of the Salinic I tectonic, Cancañiri glacial and Ireviken biotic events: Biochemostratigraphy of the Lower Siluriansuccession in the Niagara Gorge area, Canada and U.S.A.

The Phanerozoic δ88/86Sr record of seawater: New constraints on past changes in oceanic carbonate fluxes

C- and Sr-isotope stratigraphy of the São Caetano complex, Northeastern Brazil: a contribution to the study of the Meso-Neoproterozoic seawater geochemistry

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