Journal ArticleDOI
Lead isotopes by LA-MC-ICPMS: Tracking the emergence of mantle signatures in an evolving silicic magma system
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In this article, a new in situ Pb isotope technique has been developed to measure the compositions of 113 individual LV feldspars (mainly sanidine) and their host glasses by UV laser ablation MC-ICPMS.About:
This article is published in Geochimica et Cosmochimica Acta.The article was published on 2007-04-15. It has received 52 citations till now. The article focuses on the topics: Feldspar & Magma chamber.read more
Citations
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High spatial resolution analysis of Pb and U isotopes for geochronology by laser ablation multi-collector inductively coupled plasma mass spectrometry (LA-MC-ICP-MS)
TL;DR: In this article, the laser ablation multicollector inductively coupled plasma mass spectrometry (LA-MC-ICP-MS) was used for age determinations using the 235U and 238U radioactive decay series to the daughter isotopes 207Pb and 206Pb, respectively, using the mineral zircon (ZrSiO4), which is widely used to decipher geological processes.
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Uranium Series Accessory Crystal Dating of Magmatic Processes
TL;DR: In this article, the authors applied high-spatial-resolution accessory mineral dating techniques for uranium series isotopes to young volcanic and cognate plutonic rocks and found that individual crystals and crystal populations record crystallization episodes lasting from <1,000 to many hundreds of thousands of years.
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Implications of pre-eruptive magmatic histories of zircons for U–Pb geochronology of silicic extrusions
TL;DR: In this article, the difference between initial zircon growth and eruption age measured by other (e.g., 40Ar/39Ar) techniques is in excess of the achievable analytical uncertainty for eruptions.
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Timescales of quartz crystallization and the longevity of the Bishop giant magma body.
Guilherme A. R. Gualda,Ayla S. Pamukcu,Mark S. Ghiorso,Alfred T. Anderson,Stephen R. Sutton,Mark L. Rivers +5 more
TL;DR: It is concluded that large-volume, crystal-poor magma bodies are ephemeral features that, once established, evolve on millennial timescales and zircon crystals record the extended periods of time necessary for maturation of the crust and establishment of these giant Magma bodies.
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New Perspectives on the Bishop Tuff from Zircon Textures, Ages and Trace Elements
TL;DR: In this article, the authors used secondaryion mass spectrometry (SIMS) to estimate the age of Bishop Tuff zircons from 15 stratigraphically controlled Bishop tuff samples and two Glass Mountain (GM) lava samples.
References
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Journal ArticleDOI
Least squares fitting of a straight line with correlated errors
TL;DR: In this paper, the fitting of a straight line when both variables are subject to crrors is generalized to allow for correlation of the z and y errors, illustrated by reference to lead isochron fitting.
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Gradients in silicic magma chambers: Implications for lithospheric magmatism
TL;DR: In this article, the authors studied the effect of pre-emptive and preemptive gradients in T and O 2 in a variety of compositionally zoned ash flow tuffs.
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The effect of initial230Th disequilibrium on young UPb ages: the Makalu case, Himalaya
TL;DR: In this paper, the authors compare the ages of zircon, xenotime, and monazite from two different samples of the Himalayan Makalu granite and show the two U decay series to be in disequilibrium.
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Pb isotopic analysis of standards and samples using a 207Pb–204Pb double spike and thallium to correct for mass bias with a double-focusing MC-ICP-MS
TL;DR: In this article, a double-focusing MC-ICP-MS was used to obtain a Pb isotope analytical method using a 207Pb-204Pb double spike (DS).