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Ann-Kathrin Kraemer

Ann-Kathrin

PhD Candidate

Address
Malteserstr. 74-100, Haus N
Room N4
12249 Berlin

Professional Experience

since 06/2020

Doctoral candidate, Freie Universität Berlin


Education

10/2017 - 04/2020

Master student in Geosciences with major in “Planetology” at Westfälische Wilhelms-Universität Münster

Thesis: “Does acid washing disturb isotope chronometers in meteorites?”

Supervisors: Prof. Erik E. Scherer, Ph.D., Prof. Dr. Andreas Stracke

10/2014 - 09/2017

Bachelor student in Geosciences at Westfälische Wilhelms-Universität Münster

Thesis: “Classification and characterization of new lunar meteorites”

Supervisor: Apl. Prof. Dr. Addi Bischoff, Dr. Knut Metzler

11/2019 – 01/2020

Student Assistant to Prof. Erik E. Scherer, Institute for Mineralogy, Westfälische Wilhelms-Universität Münster

12/2017 – 11/2018

Student Assistant to Prof. Addi Bischoff, Institute for Planetology Westfälische Wilhelms-Universität Münster

Current research interests

In this research project we will investigate mass-dependent stable isotope variation of the volatile metals Zn, Cu, and K in refractory inclusions of carbonaceous chondrites.

Carbonaceous chondrites are undifferentiated meteorites and remnants of the early stages of planet formation, so they can be used to help constrain processes in the solar nebular. Different groups of carbonaceous chondrites show depletions in volatile element contents to various degrees. Refractory inclusions are one of the components of carbonaceous chondrites. Calcium-Aluminum-rich inclusions, a subtype of refractory inclusions, are the oldest dated objects in the solar system.

With the tool of mass-dependent stable isotope fractionations we want to investigate the origin of the observed volatile element depletions in carbonaceous chondrites in general and investigate the volatile element content in refractory inclusions in particular. One goal of our research is to investigate whether the differing abundances of carbonaceous chondrite components in carbonaceous chondrite groups, particularly of refractory inclusions, correlate with observed trends of volatile element depletion and stable isotope compositions.

To help investigate the origin of the stable isotope composition in refractory inclusions, electron beam methods will be used to provide the petrologic context to constrain the environment in which volatile elements were incorporated into these inclusions of different carbonaceous chondrite groups.

This research project is project B8 “Is the depletion of the moderately volatile elements in the Earth inherited from nebular processes?” of the Collaborative Research Center TRR 170 – Late Accretion Onto Terrestrial Planets and so is part of a collaboration between Freie Universität Berlin, Westfälische Wilhelms-Universität Münster, Technische Universität Berlin, Deutsches Zentrum für Luft- und Raumfahrt Berlin, and Museum für Naturkunde Berlin.