Titanite u-pb dating

titanite u-pb dating

How do you date titanite using U-Pb?

Here, we developed a technique for U-Pb dating of titanite using the 193 nm ArF laser-ablation system and Agilent 7500a Q-ICP-MS. Standards of titanite (BLR-1 and OLT-1) and zircon (91500 and GJ-1) were dated using single spot and line raster scan analytical methods.

Can titanite be used for isotopic dating?

Titanite is an ideal mineral for U-Pb isotopic dating because of its relatively high U, Th and Pb contents. Here, we developed a technique for U-Pb dating of titanite using the 193 nm ArF laser-ablation system and Agilent 7500a Q-ICP-MS.

Do Titanites have pre-UHP U–Pb dates?

A modest number of titanites sampled across large areas, however, have pre-UHP U–Pb dates, indicating that they survived their excursion to and return from mantle depths metastably. This has three important implications. 1.

Is U–Pb titanite a Precambrian orogen?

Campaign-style, orogen scale dating in the Western Gneiss Region of Norway shows a general gradient in U–Pb titanite dates from Precambrian to Scandian toward the core of the orogen.

How do you date titanite using U-Pb?

Here, we developed a technique for U-Pb dating of titanite using the 193 nm ArF laser-ablation system and Agilent 7500a Q-ICP-MS. Standards of titanite (BLR-1 and OLT-1) and zircon (91500 and GJ-1) were dated using single spot and line raster scan analytical methods.

Can titanite be used for isotopic dating?

Titanite is an ideal mineral for U-Pb isotopic dating because of its relatively high U, Th and Pb contents. Here, we developed a technique for U-Pb dating of titanite using the 193 nm ArF laser-ablation system and Agilent 7500a Q-ICP-MS.

What is the best mineral for U-Pb isotopic dating?

Titanite is an ideal mineral for U-Pb isotopic dating because of its relatively high U, Th and Pb contents.

What is the age of olt-1 titanite?

The weighted mean 206 Pb/ 238 U ages of OLT-1 titanite are 1015±5 Ma (2 σ, n =24) and 1017±6 Ma (2 σ, n =24) by single spot and line raster scan analyses, respectively, using BLR-1 titanite as the external standard. These ages are consistent with its reference age of about 1014 Ma.

What is the concentration of PB in titanite?

In general, the titanite of igneous origin contains concentrations of U up to several hundred parts per million, and only low concentrations of the common Pb so that precise U–Pb ages are often obtained.

Can titanite U–Pb geochronology help us understand the evolution of orogenic terranes?

Here, we complement the current geochronological record of the Capricorn Orogen, Western Australia, with titanite U–Pb geochronology and geochemistry of felsic intrusive rocks to draw conclusions about the use of titanite in understanding the evolution of orogenic terranes.

What do titanite U-Pb data tell us about Th/U ratios?

For example, titanite U-Pb data in sample 84599 from the Sylvania Inlier reveal a systematic but continuous variation in Th/U ratio with 207 Pb/ 238 U (i.e., the slope of a 207 Pb/ 206 Pb vs. 238 U/ 206 Pb Tera-Wasserburg plot; Fig. 5 b).

What is the U–Pb of metamorphic growth?

The titanite of metamorphic growth tends to contain < 100 ppm U and higher proportions of the common Pb, resulting in less precise U–Pb ages and stronger dependence on the choice of initial Pb isotopic composition ( Frost et al., 2000 ).

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