Brenton Fairey

8 Questions 18 Answers 0 Followers

Questions related from Brenton Fairey

What would modern lead contamination look like for a detrital zircon sample in a Wetherill or TW plot?

I commonly find that detrital zircon samples analysed by LA-ICP-MS display discordia arrays, in Wetherill space, that plot toward the origin. This implies some form of recent lead loss - a topic...

06 November 2019 1,419 1 View

Why not report and use single analysis concordia ages (Ludwig, 1998) for detrital zircon data?

I was reading a past question (https://www.researchgate.net/post/how_to_calculate_the_degree_of_discordance_of_zircon_ages) where people were debating the cutoff age for switching between...

03 May 2018 1,863 5 View

What is the best way to mount white mica separates?

I have detrital mica separates that I would like to mount in EpoThin resin for microprobe analysis and I would simply like to know the best method for mounting them. With zircons you can mount on...

30 June 2016 592 6 View

What major tectonic processes were occurring on the (present) western, south western and north western margins of the Kaapvaal Craton at ca. 620 Ma?

I am trying to establish what may have been driving brines in the lower Transvaal Supergroup rocks at around 620 Ma. Most tectonic activity during this period seems to be too distal (e.g. Damara...

06 May 2016 4,585 10 View

How large a sample (i.e. by mass) do I need in order to ensure that I capture all zircon populations in a granite?

I am looking to characterise crystalline basement in terms of zircon hafnium and U-Pb ages as reference material for detrital samples in the region. For this reason, I want to make sure that I...

05 February 2016 2,167 11 View

How can I go about hand picking detrital zircons for U/Pb analysis without introducing bias?

I am going to be picking zircons for the first time soon. I have read a lot of literature related to single-zircon LA-ICPMS work for provenance studies. I am concerned about introducing bias when...

14 January 2015 5,053 16 View

Are there any textbooks out there that are the "definitive guide" to geochronology?

I am going to be doing a lot of research involving U-Pb zircon ages as well as Ar-Ar mica ages. So I want to get as clued-up as possible before I undertake any instrument/analytical training....

05 February 2014 3,544 11 View

Has anyone come across O-isotope fractionation data for braunite?

I analyzed some braunite samples for O-isotope compositions during my MSc but could not find experimental data to compare my results to.

15 January 2014 6,157 2 View