A refined ultrahigh-vacuum furnace for rare gas analysis

Staudacher, T.; Jeßberger, E. K.; Dörflinger, D; Kiko, J.

doi:10.1088/0022-3735/12/3/513

Cited by 31 publications

(31 citation statements)

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“…Samples analyzed by the furnace step heating method utilized a double vacuum resistance furnace similar to the Staudacher et al (1978) design. Calibration of the furnace was achieved via a double thermocouple experiment with an internal and external (control) thermocouple.…”

Section: B2 K-feldspar 40 Ar/ 39 Ar Datingmentioning

confidence: 99%

Zircon (U-Th)/He thermochronometry: He diffusion and comparisons with 40Ar/39Ar dating

Reiners

Spell

Nicolescu

et al. 2004

Geochimica et Cosmochimica Acta

648

549

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Section: B2 K-feldspar 40 Ar/ 39 Ar Datingmentioning

confidence: 99%

Zircon (U-Th)/He thermochronometry: He diffusion and comparisons with 40Ar/39Ar dating

Reiners

Spell

Nicolescu

et al. 2004

Geochimica et Cosmochimica Acta

648

549

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“…A bulk separate of this mineral was packed in aluminium foil for the irradiation at the University of Michigan nuclear reactor for 28 h. FCT sanidine dated at 28.02 ± 0.28 Ma (Rennes et al 1998) was used as a flux monitor. Then K-feldspars were placed in a double-walled furnace of the Staudacher type (Staudacher et al 1978). The degassing followed a specific cyclic protocol between 400 and 1,400°C as suggested by Lovera et al (1991); analytical procedure followed that described in Arnaud et al (2003).…”

Section: Geological Setting and Sample Descriptionmentioning

confidence: 99%

The Meso-Cenozoic thermo-tectonic evolution of the Eastern Pyrenees: an 40Ar/39Ar fission track and (U–Th)/He thermochronological study of the Canigou and Mont-Louis massifs

Maurel¹,

Monié²,

Pik³

et al. 2007

Int J Earth Sci (Geol Rundsch)

120

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Vertical displacements on the SW-NE Têt fault (Eastern Pyrenees Axial Zone, France), which separates the Variscan Canigou-Carança and Mont-Louis massifs, were constrained using a thermochronologic multi-method approach. 40 Ar/ 39 Ar data from the granitic Mont-Louis massif record its Variscan cooling history and reveal no ages younger than Early Cretaceous, while the CanigouCarança gneiss massif records systematically younger 40 Ar/ 39 Ar ages. These younger 40 Ar/ 39 Ar ages in the Canigou-Carança gneiss massif are the result of partial to total rejuvenation of argon isotopic systems related to a thermal flow coeval with the Cretaceous HT-BP metamorphism in the North Pyrenean Zone. Only the deepest rocks from the Canigou-Carança suffered this extensive Mid-Cretaceous thermal overprint probably due to differential burial around 4 km at that time. The post Mid-Cretaceous vertical displacements along the Têt fault are recorded by ''low'' temperature thermochronology using K-feldspar 40 Ar/ 39 Ar, zircon and apatite fission track and (U-Th)/He datings. The Mont-Louis granite samples experienced a long period of protracted cooling reflecting a lack of thermo-tectonic activity in this area from Late Palaeozoic to Early Cenozoic, followed by cooling from 55-60 Ma to Late Eocene at a mean rate of 15-20°C/Ma in the final stage. This cooling stage corresponds to Têt fault reactivation with a reversed component, promoting exhumation of the Mont-Louis roof zone contemporaneously with the south-vergent Pyrenean thrusting. In the CanigouCarança massif, the main cooling event occurred from 32 to 18 Ma at a maximum rate of 30°C/Ma during Early Oligocene followed by a more moderate rate of 3°C/Ma from Late Oligocene to Early Burdigalian, coeval with the normal reactivation of the Têt fault in brittle conditions that accommodated the final exhumation of the massif during the opening of the Gulf of Lion.

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“…For samples analyzed on VG Model 1200B mass spectrometer, computer program of Haugerud and Kunk (1988) was used to collect data. Each sample was heated in a double-vacuum, low-blank resistance furnace (similar to that described by Staudacher et al, 1978) for 10 or 20 min, in a series of 6-14 steps, to a maximum of 1650 °C, and analyzed using standard stepwise heating technique described by Snee (1982). Each standard was degassed to release argon in a single step at 1250 °C for MMhb-1, hornblende, or at 1350 °C for FCT sanidine.…”

Section: Ar/ 39 Ar Geochronologymentioning

confidence: 99%

Extension and uplift of the northern Rio Grande Rift: Evidence from <sup>40</sup>Ar/<sup>39</sup>Ar geochronology from the Sangre de Cristo Mountains, south-central Colorado and northern New Mexico

Miggins¹,

Thompson²,

Pillmore³

et al. 2002

Volcanic Rifted Margins

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New 40 Ar/ 39 Ar dating and geologic mapping of middle to late Cenozoic volcanic rocks and basin-µll sedimentary rocks preserved in the San Luis Valley and adjacent Sangre de Cristo Mountains give new insights into the timing of rift volcanism and opening of the northern Rio Grande Rift. The age, orientation, and elevation of these preserved sections delimit the timing of early rift volcanism, establishment of protorift or paleorift basins, and the uplift rate of the Sangre De Cristo crustal block along the eastern rift margin. We use offset geomorphic surfaces along with newly dated volcanic rocks to determine the exhumation or uplift rate of the Culebra Range relative to the adjacent San Luis Valley. On a µrst-order scale, we determined an exhumation rate of 58 m/m.y. based on the preserved section of 25 Ma volcanic rocks in the Culebra Range and ageequivalent volcanic rocks preserved in the San Luis Hills. A second uplift rate based on a 400 m offset section of Servilleta basalt dated as 4.7 Ma yields an exhumation rate of 87 m/m.y. Previous age data, exhumation and uplift rates, and µeld observations from the San Luis Valley region indicate that a major period of uplift and subsequent block faulting occurred during the middle Miocene (15 Ma), ~10 m.y. after the initiation of rifting.

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A refined ultrahigh-vacuum furnace for rare gas analysis

Abstract: A refined ultrahigh-vacuum furnace for rare gas analysis

Cited by 31 publications

References 0 publications

Zircon (U-Th)/He thermochronometry: He diffusion and comparisons with 40Ar/39Ar dating

Zircon (U-Th)/He thermochronometry: He diffusion and comparisons with 40Ar/39Ar dating

The Meso-Cenozoic thermo-tectonic evolution of the Eastern Pyrenees: an 40Ar/39Ar fission track and (U–Th)/He thermochronological study of the Canigou and Mont-Louis massifs

Extension and uplift of the northern Rio Grande Rift: Evidence from <sup>40</sup>Ar/<sup>39</sup>Ar geochronology from the Sangre de Cristo Mountains, south-central Colorado and northern New Mexico

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