High-precision U–Pb geochronology of the Butedale pluton, British ColumbiaThis article is one of a series of papers published in this Special Issue on the theme of Geochronology in honour of Tom Krogh.

2011 ◽  
Vol 48 (2) ◽  
pp. 557-565 ◽  
Author(s):  
Steven W. Denyszyn ◽  
Roland Mundil ◽  
Sarah J. Brownlee ◽  
Paul R. Renne
Keyword(s):  
High Precision ◽  
Thermal History ◽  
Thermal Ionization Mass Spectrometry ◽  
Pacific Coast ◽  
Test Case ◽  
Ionization Mass ◽  
The West ◽  
Plutonic Complex ◽  
Coast Plutonic Complex ◽  
Single Grain

The Butedale pluton, a ca. 100 km long compositionally zoned batholith, is part of the Coast Plutonic Complex that extends the length of the Canadian Pacific coast. Its age and thermal history are relevant to the Butedale pluton’s role as a test case of the Baja–BC hypothesis, as paleomagnetic evidence suggests that it may have formed thousands of kilometres to the south and moved northward along what is now the Coast Shear Zone. High-resolution U–Pb (chemical abrasion – thermal ionization mass spectrometry (CA–TIMS), zircon) analysis of rocks across the width of the Butedale pluton indicates that it is actually made up of at least two distinct magmatic events that formed the West Butedale pluton (ca. 95 Ma) and the East Butedale pluton (ca. 85 Ma). The East Butedale pluton was reheated by the emplacement of a younger adjacent pluton, which may have caused partial Pb loss and resulting excess scatter of 206Pb/238U zircon ages within individual samples. The West Butedale pluton may be the same age as, and part of, the nearby Ecstall pluton, thereby doubling the length of the Ecstall pluton to ca. 200 km. Single-grain, high-precision U–Pb analysis of zircon reveals previously unknown complexity and detail of emplacement and thermal history in the Butedale plutons.

U–Pb geochronology of Cretaceous magmatism on Svalbard and Franz Josef Land, Barents Sea Large Igneous Province

2013 ◽  
Vol 150 (6) ◽  
pp. 1127-1135 ◽  
Author(s):  
FERNANDO CORFU ◽  
STÉPHANE POLTEAU ◽  
SVERRE PLANKE ◽  
JAN INGE FALEIDE ◽  
HENRIK SVENSEN ◽  
...  
Keyword(s):  
Thermal Ionization Mass Spectrometry ◽  
Barents Sea ◽  
Large Igneous Province ◽  
The Arctic ◽  
Ionization Mass ◽  
Franz Josef Land ◽  
Igneous Province ◽  
Stratigraphic Record ◽  
Single Grain ◽  
Cretaceous Magmatism

AbstractThe opening of the Arctic oceanic basins in the Mesozoic and Cenozoic proceeded in steps, with episodes of magmatism and sedimentation marking specific stages in this development. In addition to the stratigraphic record provided by sediments and fossils, the intrusive and extrusive rocks yield important information on this evolution. This study has determined the ages of mafic sills and a felsic tuff in Svalbard and Franz Josef Land using the isotope dilution thermal ionization mass spectrometry (ID-TIMS) U–Pb method on zircon, baddeleyite, titanite and rutile. The results indicate crystallization of the Diabasodden sill at 124.5 ± 0.2 Ma and the Linnévatn sill at 124.7 ± 0.3 Ma, the latter also containing slightly younger secondary titanite with an age of 123.9 ± 0.3 Ma. A bentonite in the Helvetiafjellet Formation, also on Svalbard, has an age of 123.3 ± 0.2 Ma. Zircon in mafic sills intersected by drill cores in Franz Josef Land indicate an age of 122.7 Ma for a thick sill on Severnaya Island and a single grain age of ≥122.2 ± 1.1 Ma for a thinner sill on Nagurskaya Island. These data emphasize the importance and relatively short-lived nature of the Cretaceous magmatic event in the region.

A new method for TIMS high precision analysis of Ba and Sr isotopes for cosmochemical studies

2017 ◽  
Vol 32 (7) ◽  
pp. 1388-1399 ◽  
Author(s):  
Elsa Yobregat ◽  
Caroline Fitoussi ◽  
Bernard Bourdon
Keyword(s):  
Mass Spectrometry ◽  
High Resolution ◽  
High Precision ◽  
Thermal Ionization Mass Spectrometry ◽  
New Method ◽  
Ionization Mass ◽  
Sr Isotopes ◽  
Sr Resin ◽  
Thermal Ionization Mass ◽  
Isotope Measurements

A new protocol using Eichron™ Sr-resin for high-resolution Sr and Ba isotope measurements using thermal ionization mass spectrometry for cosmochemical samples.

High-precision zircon U/Pb geochronology by ID-TIMS using new 1013 ohm resistors

2016 ◽  
Vol 31 (3) ◽  
pp. 658-665 ◽  
Author(s):  
Albrecht von Quadt ◽  
Jörn-Frederik Wotzlaw ◽  
Yannick Buret ◽  
Simon J. E. Large ◽  
Irena Peytcheva ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
High Precision ◽  
Isotope Dilution ◽  
Thermal Ionization Mass Spectrometry ◽  
Isotope Ratios ◽  
Thermal Ionization ◽  
Ionization Mass Spectrometry ◽  
Accessory Mineral ◽  
Ionization Mass ◽  
Thermal Ionization Mass

Accessory mineral U–Pb geochronology by isotope dilution thermal ionization mass spectrometry (ID-TIMS) requires precise and accurate determinations of parent–daughter isotope ratios.

Kinetics of intestinal calcium absorption in humans measured using stable isotopes and high-precision thermal ionization mass spectrometry

1990 ◽  
Vol 19 (6) ◽  
pp. 353-359 ◽  
Author(s):  
Roger I. Price ◽  
G. Neil Kent ◽  
Kevin J. B. Rosman ◽  
Donald H. Gutteridge ◽  
Jonathan Reeve ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Stable Isotopes ◽  
High Precision ◽  
Thermal Ionization Mass Spectrometry ◽  
Calcium Absorption ◽  
Thermal Ionization ◽  
Ionization Mass Spectrometry ◽  
Ionization Mass ◽  
Thermal Ionization Mass ◽  
Kinetics Of

U–Pb dating of single-grain uraninite by isotope dilution thermal ionization mass spectrometry

2019 ◽  
Vol 109 ◽  
pp. 407-412 ◽  
Author(s):  
Jia-Run Tu ◽  
Zhi-Bin Xiao ◽  
Hong-Ying Zhou ◽  
Shu-Qing An ◽  
Guo-Zhan Li ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Isotope Dilution ◽  
Thermal Ionization Mass Spectrometry ◽  
Thermal Ionization ◽  
Ionization Mass Spectrometry ◽  
Ionization Mass ◽  
Single Grain ◽  
Thermal Ionization Mass

Seismic investigation of the Coast Plutonic Complex – Insular Belt boundary beneath the Strait of Georgia

1984 ◽  
Vol 21 (9) ◽  
pp. 1033-1049 ◽  
Author(s):  
Donald J. White ◽  
Ron M. Clowes
Keyword(s):  
Crustal Structure ◽  
Seismic Refraction ◽  
Unconsolidated Sediments ◽  
The West ◽  
Strait Of Georgia ◽  
Seismic Properties ◽  
Air Gun ◽  
Plutonic Complex ◽  
Major Fault ◽  
Coast Plutonic Complex

The Strait of Georgia, a topographic depression between Vancouver Island and the mainland of British Columbia, is considered to be the boundary between two tectonic provinces: the Coast Plutonic Complex on the east and the Insular Belt to the west. The allochthonous nature of the Insular Belt has been established, mainly on the basis of paleomagnetic measurements. Various tectonic models to explain the geological differences between the two provinces have been proposed. One of these suggests that the boundary is an old transform fault zone and is represented currently by a thrust fault along the eastern side of the Strait of Georgia. Other models propose that the Coast Plutonic Complex is a feature superimposed by tectonic and metamorphic events after the accretion of the Insular Belt. Such models do not require a major crustal discontinuity along the Strait of Georgia.In May 1982, a seismic refraction survey using a 32 L air gun and a radio telemetering sonobuoy system was carried out in the Strait of Georgia with the objective of investigating the nature of this boundary and determining the upper crustal structure. Three reversed profiles across the strait were shot; these are supplemented by several high-resolution reflection profiles from previous experiments. Two-dimensional models of the crustal structure across the strait have been constructed using a forward modelling ray trace and synthetic seismogram algorithm to match the travel times and amplitude characteristics of the data.Three basic layers or strata form the models, for which the maximum depth of reliability is 3 km. The first layer consists of unconsolidated sediments and Pleistocene glacial deposits, and the second represents Late Cretaceous – early Tertiary basin fill sediments that form the Nanaimo Group, the Burrard–Kitsilano formations, and the Chuckanut Formation. The third layer is likely the extension of the Coast Plutonic Complex beneath the strait, but the westerly limit of this unit is undetermined because of seismic properties similar to those of the Insular Belt volcanics. A local fault is located ~15 km northeast of Galiano Island on the west side of the strait. However, our study shows no evidence for a major fault along the strait. Thus those aspects of tectonic models that require the existence of a major transform or transcurrent fault boundary along the Strait of Georgia. may have to be revised.

High-precision timing of the Quaternary standard samples with thermal ionization mass spectrometry (TIMS) U-series method

1998 ◽  
Vol 43 (4) ◽  
pp. 333-336 ◽  
Author(s):  
Peng Zicheng ◽  
Wang Zhaorong ◽  
Sun Weidong ◽  
Ma Zhibang ◽  
Xia Ming ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
High Precision ◽  
Thermal Ionization Mass Spectrometry ◽  
Thermal Ionization ◽  
Ionization Mass Spectrometry ◽  
Ionization Mass ◽  
Series Method ◽  
Standard Samples ◽  
Thermal Ionization Mass

High-precision thermal ionization mass spectrometry dating of young volcanic rocks by using U-series method

2000 ◽  
Vol 45 (1) ◽  
pp. 83-87 ◽  
Author(s):  
Fei Wang ◽  
Zicheng Peng ◽  
Wenji Chen ◽  
Zhaorong Wang ◽  
Jiwu Yang ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
High Precision ◽  
Thermal Ionization Mass Spectrometry ◽  
Volcanic Rocks ◽  
Thermal Ionization ◽  
Ionization Mass Spectrometry ◽  
Ionization Mass ◽  
Series Method ◽  
Thermal Ionization Mass

Magmatic duration of the Emeishan large igneous province: Insight from northern Vietnam

Geology ◽  
2020 ◽  
Vol 48 (5) ◽  
pp. 457-461 ◽  
Author(s):  
J. Gregory Shellnutt ◽  
Thuy Thanh Pham ◽  
Steven W. Denyszyn ◽  
Meng-Wan Yeh ◽  
Tuan-Anh Tran
Keyword(s):  
High Precision ◽  
Thermal Ionization Mass Spectrometry ◽  
Volcanic Rocks ◽  
Large Igneous Province ◽  
Ionization Mass ◽  
Emeishan Large Igneous Province ◽  
Northern Vietnam ◽  
Global Cooling ◽  
Igneous Province ◽  
Distinct Period

Abstract The eruption of Emeishan lava in southwestern China and northern Vietnam is considered to be a contributing factor to the Capitanian mass extinction and subsequent global cooling event, but the duration of volcanism is uncertain. The difficulty in assessing the termination age is, in part, due to the lack of high-precision age data for late-stage volcanic rocks. The Tu Le rhyolite of northern Vietnam is the most voluminous silicic unit of the Emeishan large igneous province (ELIP) and is spatially associated with the Muong Hum and Phan Si Pan hypabyssal plutons. Chemical abrasion–isotope dilution–thermal ionization mass spectrometry U-Pb dating of zircons from the Tu Le rhyolite (257.1 ± 0.6 Ma to 257.9 ± 0.3 Ma) and Muong Hum (257.3 ± 0.2 Ma) and Phan Si Pan (256.3 ± 0.4 Ma) plutons yielded the youngest high-precision ages of the ELIP yet determined. The results demonstrate that Emeishan lavas erupted over a period of ∼6 m.y,. with plutonism ending shortly thereafter. Thus, it is possible that Emeishan volcanism contributed to global cooling into the middle Wuchiapingian. It appears that these rocks represent a distinct period of ELIP magmatism, as they are young and were emplaced oblique to the main north-south–trending Panxi rift.

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