To perform noble gas measurements please submit a form. REQUEST FORM
This information will be used by the laboratory director to prioritize projects and schedule analyses. The lead time required to obtain 40Ar/39Ar results is primarily dictated by when the laboratory sends out shipments for neutron irradiation to the USGS TRIGA reactor. This normally occurs three times a year: January, May, and September. With typical back log within the laboratory, users can expect to analyze samples from a given irradiation in about 2-4 months after the date of irradiation with the scheduling of work set by the laboratory director. The rate limiting step in (U-Th)/He analysis is generally zircon dissolution. Zircon dissolution may be performed only by Stanford-affiliated researchers trained in the use of HF and other reagents in the the mineral dissolution facility.
Measurement Type |
Hours |
Stanford |
External |
---|---|---|---|
40Ar/39Ar measurement (heating step, grain fusion, ablation pit) |
0.25 |
$25/hr |
n/a |
Apatite (U-Th)/He (He measurement, grain dissolution &, U-Th data) |
2.0 |
$50.00 / grain |
n/a |
Zircon (U-Th)/He (He measurement, grain dissolution &, U-Th data) |
4.0 |
$100.00 / grain |
n/a |