• Program

    The Goldschmidt2020 program

  • Venue

    All about the venue and city

  • Registration

    Details of how to register to attend the conference and/or submit an abstract

  • Exhibition

    Information for and about exhibitors and sponsors

  • My Goldschmidt

    My program, purchases, connections, etc.




  • Sponsor Seminars

  • Training Events

    These are scheduled events to help delegates test out the tools and platform we will be using for the Q&A and other events at the conference.

  • Workshops

    Our workshop program provides training and teaching in topics across geochemistry and related fields. We are currently liaising with the workshop organisers to ascertain if any workshops can become virtual. Any updates will be added to this page.


  • Conference Locations

    Location of the convention center and social events

  • Hotels

    The hotels are no longer available to book at the special rates agreed by the conference. Should you wish to cancel or change your hotel reservation please see the details below.


Present your work




My Goldschmidt

Role functions

Abstract Details

(2020) The Ferrar Continental Flood Basalt: A ~1.6 Ma Long Duration Evidenced by High-Precision 40Ar/39Ar Ages

Ware B, Jourdan F, Chiaradia M & Nebel O


Sorry, the PDF cannot be displayed on your browser.

Download abstract

The author has not provided any additional details.

06n: Room 2, View in program

Listed below are questions that have been submitted by the community that the author will try and cover in their presentation. To submit a question, ensure you are signed in to the website. Authors or session conveners approve questions before they are displayed here.

Submitted by Yuri Amelin on
Are there rocks in the Ferrar province where both zircon U-Pb and plagioclase 40Ar/39Ar dates are obtained? If yes, how do they compare to each other?

Submitted by Yankun Di on
Do you have a temperature estimate of the magma evolution? Can the K-Ar systems in plagioclase be closed to record ages before zircon saturation?

Submitted by Matthew Heizler on
Enjoyed your presentation. If you have a 70%-30% mixture of compositionally different plagioclase grains, this should be readily determined by microprobe analyses of your bulk mineral separation - do you observe this? Have you considered a fractionation model for 40Ar relative to 39Ar to explain your climbing spectra? This is commonly observed in sanidine age spectra and it would predict 1-2 Ma age difference from initial heating steps to the final heating steps. This would not predict the differences between the samples, thus I agree you likely are seeing a spread in apparent ages of bulk samples. Lastly, Yuri's question is a good one. You show a model argon loss spectra for a 185 Ma plagioclase. Did you use a reasonable thermal history that would allow dissolution of older zircons, but only minor argon loss?

Sign in to ask a question.