DGSE Colloquium Speaker Series—April 3

DGSE Colloquium Speaker SeriesApril 3:
Dr. Daniela Rubatto (U Bern, Switzerland)
Mineralogical Society of America, Distinguished Lecturer

A message from Philipp Ruprecht, UNR Dept. of Geological Sciences & Engineering (DGSE):
Dr. Daniela Rubatto will be giving two talks on Monday April 3.
Technical talk at 9:30-10:30 AM in LME 425 at University of Nevada, Reno. (Everyone interested is welcome.) “The tale of the tiny: petrology, geochemistry and geochronology of U-Pb accessory minerals”

The tale of the tiny: petrology, geochemistry and geochronology of U-Pb accessory minerals

For decades accessory minerals containing traces of the radioactive elements Th and U have been used for reconstructing crustal processes. Minerals such as zircon, monazite, allanite, rutile and titanite are robust geochronometers and isotopic tracers. Additionally, these minerals incorporate many other trace elements that provide information on the conditions of formation. Therefore, U-Th accessory phases provide important links between geochronology, petrology and geochemistry. Decoding the wealth of information these minerals preserve requires a variety of methods and approaches. As these accessory minerals are tiny and often contain multiple domains, in situ analysis with high spatial resolution is required. The interpretation of any data acquired from these accessory minerals demands an understanding of their behaviour during metamorphism and melting, and the evaluation of decoupling of the different chemical and isotopic signals.

This lecture will review recent developments in petrology and geochemistry of U-Pb accessory minerals. They form in a variety of rock types under conditions as variable as diagenesis to deep subduction, melt crystallization to low temperature alteration. Processes of formation include precipitation from aqueous fluids and melts, metamorphic reactions involving other phases, and alteration and sub-solidus modification of pre-existing crystals. These processes lead to distinguishable textural, chemical and isotopic characteristics of specific mineral growth zones that are powerful links to their petrogenesis.

DGSE Seminar at 4 pm in DMS 102:
“Fast and furious or slow and steady: rates of subduction and crustal melting”

List of other confirmed seminar speakers for Spring 2017:
04/24 Dr. James Dolan (USC) – Slemmons Lecture
05/01 Dr. Keith Priestley (Cambridge, UK)

These talks are at the usual location in DMS 102 at 4 p.m.
Parking at UNR

If you have questions, you can contact Philipp Ruprecht, Assistant Professor, Geological Sciences, at 775-682-6048.

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