Characterization and calibration of 40Ar/39Ar dating standards

Spell, Terry L.; McDougall, Ian

doi:10.1016/s0009-2541(03)00005-6

Cited by 245 publications

(196 citation statements)

References 30 publications

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“…Standards used include LP-6 (127.8 ± 0.7 Ma: Odin et al, 1982) and HD-B1 (24.21 ± 0.32 Ma: Fuhrmann et al, 1987;Hess and Lippolt, 1994;Hautmann and Lippolt, 2000). At the 95% confidence level, the values adopted here are consistent with those obtained for several 40 Ar/ 39 Ar standards intercalibrated against biotite GA-1550 (Renne et al,1998;Spell and McDougall, 2003).…”

Section: The Kilimanjaro a Bolt For The Ears Magmatic Systemsupporting

confidence: 83%

New K–Ar age determinations of Kilimanjaro volcano in the North Tanzanian diverging rift, East Africa

Nonnotte

Guillou

Gall

et al. 2008

Journal of Volcanology and Geothermal Research

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The Kilimanjaro is the African highest mountain and culminates at 5895 m high. This huge volcanic edifice is composed of three main centres along a N110°E-striking axis (Shira, Kibo and Mawenzi from W to E), and emplaced in a key area where a major N80°E-oriented volcanic lineament intersects a first-order NW-SE basement fault-like discontinuity.Seventeen K-Ar ages (on microcrystalline groundmass) acquired on lavas and intrusive facies from the three eruptive centres confirm that the Plio-Quaternary volcanicity of Kilimanjaro is clearly polyphased. The oldest phases of volcanic activity begun at ~2.5 Ma in the Shira vent and our data suggest that the latest important phases occurred around 1.9 Ma, just before the collapse of the Northern part of the edifice. Magmatic activity then shifted eastwards in the

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Section: The Kilimanjaro a Bolt For The Ears Magmatic Systemsupporting

confidence: 83%

New K–Ar age determinations of Kilimanjaro volcano in the North Tanzanian diverging rift, East Africa

Nonnotte

Guillou

Gall

et al. 2008

Journal of Volcanology and Geothermal Research

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“…The reason for the difference is most likely due to biased 40 K decay constants (e.g. Ivanov, 2006;Min et al, 2000) Using a more recent value of 98.5 Ma (Spell and McDougall, 2003) for the GA1550 standard makes the 40 Ar/ 39 Ar ages ~ 0.9 % younger than U-Pb ages (Ivanov, 2006). The errors of 40 Ar/ 39 Ar ages shown here are at the 2σ level including reported analytical errors on the J-factor, but not including errors which would result from inhomogeneities of the standards (because this information is rarely reported in original publications) and errors of intercalibration of the standards.…”

Section: Comments On the Use Of Different Isotopic Systemsmentioning

confidence: 99%

Evaluation of different models for the origin of the Siberian Traps

Ivanov¹

2007

Special Paper 430: Plates, Plumes and Planetary Processes

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Various evidence, including size and volume of the Siberian Traps, timing and duration of eruptions, paleotectonic and paleogeographic reconstructions, lithospheric structure, heat flow, trace element and radiogenic isotope compositions of lava are reviewed in this chapter.The major evidence may be summarized as follows. The Siberian Traps erupted in a number of brief volcanic events from the Late Permian until the end of the Middle Triassic. They In radiogenic isotope and trace element coordinates, mixing trends between these two types of magma are absent or, at least, not evident. Some volcanic rocks contain primary magmatic mica. These are considered in light of different models. Each model can explain, or was thought to explain, particular observations. However, some evidence can be fatal for some models. For example, the enormous size and volume cannot be explained in the framework of impact and edge-driven convection models, and is problematic for lithospheric delamination models. Plume models face problems explaining the uplift/subsidence pattern and the absence of mixing curves between expected high-Ti primary plume melts and contaminated low-Ti

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“…Mineral standards of known age are necessary for us to determine the Step-heating age spectra obtained from the Dellen impact glass neutron dose (J value) of a sample to be able to calculate the 40 Ar/ 39 Ar age of an unknown sample (see 'Neutron irradiation'). The importance of using reliable and homogenous mineral standards at the grain-to-grain level is obvious, underpinning the ultimate accuracy of the technique Spell & McDougall 2003;Jourdan & Renne 2007). Heterogeneous standards have now been scrutinized and dismissed (Heri et al 2013) and replaced by high-quality counterparts.…”

Section: Age Standardsmentioning

confidence: 99%

Advances in ⁴⁰ Ar/ ³⁹ Ar dating: from archaeology to planetary sciences – introduction

Jourdan

Mark

Vérati

2014

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Characterization and calibration of 40Ar/39Ar dating standards

Cited by 245 publications

References 30 publications

New K–Ar age determinations of Kilimanjaro volcano in the North Tanzanian diverging rift, East Africa

New K–Ar age determinations of Kilimanjaro volcano in the North Tanzanian diverging rift, East Africa

Evaluation of different models for the origin of the Siberian Traps

Advances in ⁴⁰ Ar/ ³⁹ Ar dating: from archaeology to planetary sciences – introduction

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Characterization and calibration of 40Ar/39Ar dating standards

Cited by 245 publications

References 30 publications

New K–Ar age determinations of Kilimanjaro volcano in the North Tanzanian diverging rift, East Africa

New K–Ar age determinations of Kilimanjaro volcano in the North Tanzanian diverging rift, East Africa

Evaluation of different models for the origin of the Siberian Traps

Advances in 40 Ar/ 39 Ar dating: from archaeology to planetary sciences – introduction

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Product

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Advances in ⁴⁰ Ar/ ³⁹ Ar dating: from archaeology to planetary sciences – introduction