new paper online (29.07.2016)

Contrasting hydrological processes of meteoric water incursion during magmatic–hydrothermal ore deposition: An oxygen isotope study by ion microprobe, by Szandra Fekete, Philipp Weis, Thomas Driesner, Anne-Sophie Bouvier, Lukas Baumgartner, Christoph A. Heinrich,

Earth and Planetary Science Letters, Available online 28 July 2016, ISSN 0012-821X,

GSA 2016: 4 abstracts

Bégué F., Baumgartner L., Bouvier A.-S., Putlitz B., Vennemann T. (2016) Reactive fluid-flow and stable isotope exchange related to hydrothermal veins in carbonate xenoliths: a couples CL imaging and SIMS study, GSA abstract 2016

Lacroix B., Baumgartner L., Bouvier A.-S., Vennemann T. (2016) Multi fluid-flow events during mode I opening: a microstructural and SIMS study

Putlitz B., Seitz S., Baumgartner L., Bouvier A.-S. (2016) Oxygen isotope constraints on crustal melting: SIMS data from Jurassuc rhyolites of the Chon Aike Province (Patagonia, Argentina), GSA abstract 2016.

Siron G., Baumgartner L., Bouvier A.-S., Vennemann T. (2016) Water content of biotite as monitor of change in water activity, GSA abstract 2016.

U-Pb protocols

After a few months of testing we are pleased to announce that U-Pb protocols have been revised and instrumental setup has been optimized for U-Pb ages. We can produce concordant, accurate and precise ages (within 1%) for zircon. Testing has been performed for ages from Miocene to early Proterozoic.

Monazite U-Pb dating has also been achieved with good precision. For this mineral however quality may depend on the chemical composition of the sample due to possible matrix effects.

At this stage, spot size is ~ 25 micron across (2 microns deep), and smaller spot sizes will depend on the age and composition of the sample.

We are at the stage where we welcome users (Master students to senior researchers) to propose project for U-Pb geochronology. For the next few sessions any U-Pb analysis will still be considered development and no charge will apply.

New paper submissions

Two new papers have been submitted on March 31rst:

McCarthy A., Müntener O., Bouvier A.-S., Baumgartner L.P. (submitted) Melt Extraction Zones in Shallow Arc Plutons: Insights from Fisher Lake Orbicules and Comb Layers, Northern Sierra Nevada, submitted to Journal of Petrology

Seitz S., Baumgartner L.P., Bouvier A.-S., Putlitz B., Vennemann T. (submitted) Quartz Standards for Oxygen Isotope and Trace Element Analysis by SIMS, submitted to Geostandard and Geoanalytical Research

New paper submission

A new paper have been submitted:

Fekete S., Weis P., Dreisner T., Bouvier A.-S., Heinrich C. A., Baumgartner L. P. (under review) Contrasting hydrological processes of meteoric water incursion during magmatic-hydrothermal ore deposition, submitted to EPSL

New paper submission

“Biotite standards for SIMS oxygen isotopes analysis” by Siron, Guillaume; Baumgartner, Lukas; Bouvier, Anne-Sophie; Putlitz, Benita; Vennemann, Torsten,  has been submitted to Geostandards and Geoanalytical Research.

EGU: 3 abstracts

If you are going to EGU this year, do not miss the three presentations/posters reporting SwissSIMS data:

“Silicon and oxygen isotopic trends in Mesozoic radiolarites” by Maximlien Bôle et al.

“The physical hydrology of magmatic-hydrothermal systems: High-resolution 18O records of magmatic-meteoric water interaction from the Yankee Lode tin deposit (Mole Granite, Australia)” by Szandra Fekete et al.

“Decrease in water activity due to fluid absent partial melting monitored with water content in biotite in the Western Adamello contact aureole (Italy)” by Guillaume Siron et al.