Home

  • 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.

Home

Program

Events

  • 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.

Locations

  • 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.

Information

Present your work

Attend

Exhibition

Sponsorships

My Goldschmidt

Role functions

Abstract Details

The Promise and Potential Pitfalls of Acid Leaching for Pb-Pb Chronology

Ito K & Iizuka T

Ito K & Iizuka T (2020) Goldschmidt Abstracts, 2020 1153

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

Kengo Ito
Tsuyoshi Iizuka View all 3 abstracts at Goldschmidt2020

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
Have you observed meteorite pyroxenes that do not present lamellae or structures induced by solid state dissolution? If yes, what kind of pyroxenes these are? Can we expect isotopic fractionation in such cases?
Thank you for the questions. In this study, we used three achondrites (D'Orbigny, Ibitira and Northwest Africa 6704) and each pyroxene has different textural features and chemical compositions. D'Orbigny and Northwest Africa 6704 don't have evident lamellae structures and show only igneous textures (Mittlefehldt et al. 2002: Hibiya et al. 2019). Isotopic variation was not observed in previous works of Pb-Pb dating about these meteorites (Amelin. 2008: Amelin et al. 2019) and I think that the possibility of scattered Pb isotopes is lower than the case of meteorites which experienced secondary metamorphic events.

Submitted by Yankun Di on
Nice work! In some cases, such as shown in Koefoed et al. 2015 LPSC, the positions of HF leachate and residue on the diagram do not always form a meaningful metamorphic isochron like in your model. Do you have an explanation on what might cause this?
Thanks, Yankun! I agree your opinions. I take it that you mention the positions of HF and residue of a bulk sample in Koefoed et al. 2015. As the case of whole rock is more complicated than single mineral, it is difficult to give an clear explanation. Some mechanisms such as isotopic fractionation during acid leaching or mixing trends between terrestrial contamination Pb which lies below isochron are needed to explain this. I think trace elements data (especially REEs) in leachates and residue is useful to understand what is going on in each leaching step and determine the cause of isotopic variation.

Sign in to ask a question.