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

Assembly of Monotonous Basaltic Andesite Magmas at Momotombo Volcano, Nicaragua, and the 2015–2016 Eruption

Tramontano S, Zayac JM, Aldebot S, Espinoza E & Longpré M-A

Tramontano S, Zayac JM, Aldebot S, Espinoza E & Longpré M-A (2020) Goldschmidt Abstracts, 2020 2621

Sorry, the PDF cannot be displayed on your browser.

Download abstract

The author has not provided any additional details.

05d: Room 2, View in program

Samantha Tramontano View all 2 abstracts at Goldschmidt2020
John M. Zayac
Silvio Aldebot
Eveling Espinoza
Marc-Antoine Longpré View all 7 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 Chiara Maria Petrone on
HI Marc-Antonie, very interesting work. It seems that homogenous WR composition is a quite common features at many stratovolcanoes. We certainly see this at Popocatepetl, Stromboli and many other volcanoes. Your cpx are really homogenous as well, which is a bit unexpected, since pyroxenes tend to show a quite complex history and heterogeneity, how do you interpret them? From your crystal population it seems that plg but not cpx record mafic injections (apart for the final rim). What does the crystal mush look like at Momotombo?
Hi Chiara, good questions, thanks! Yes the cpx data we have do not show a huge range in composition and Mg# is relatively low. Cores tend to have low Mg# and the crystals are reversely zoned, but some more complexly so than the one shown in the main presentation. These crystals seem to record a fairly evolved, shallow magmatic environment (as also supported by melt inclusions) that got sampled by an intruding andesitic melt. Indeed the plagioclase data record interactions with more mafic liquids at some point in time, but we also have a lot more data there, so we can't exclude that cpx recording similar mafic interactions exist somewhere in the population. The last part of your question is harder to answer with microanalytical data focusing mainly on a single eruption (the 2015-2016 eruption) — I think we would need similar data on multiple eruptions. Presumably the mush is vertically extensive, but the 2015-2016 event seems to have mostly sampled its upper part.

Sign in to ask a question.