GeStEIN-Kolloquium

Diese digitale Veranstaltung dient dazu, die Geowissenschaften allen näherzubringen, spannende Themen relevant zur Wissenschaft, Gesellschaft und Studium zu teilen, sowie unterschiedliche Hochschulen, Forschungseinrichtungen und geowissenschaftliche Projekte vorzustellen. Die Studierenden, Wissenschaftler*innen und alle anderen Zuhörer*innen, sollen die Gelegenheit haben bestimmte Themenfelder der Geowissenschaften neu zu entdecken oder zu vertiefen. Wir bieten Vortragenden (Masterstudierende, PhD, Post-Docs, Wissenschatler*innen, Berufstätige) eine Möglichkeit, Ihr Wissen einem breiten Publikum aus dem deutschsprachigen Raum mitzuteilen.

Der Zugangslink zu der Vortragsreihe lautet:

https://uni-bonn.zoom.us/j/95337091213?pwd=aytaakRSNVRFUUpYQXVOVVdJR3dndz09

Meeting-ID: 953 3709 1213
Kenncode: 654800

02.06.2021: Quantifying Earth surface processes using isotope geochemistry in Anatolia: links with tectonics and biodiversity

02.06.2021 um 18 Uhr

Dr. Maud JM Meijers – Senckenberg Biodiversity and Climate Research Centre (SbiK-F), Frankfurt am Main

Quantifying Earth surface processes using stable isotope geochemistry in Anatolia:

links with tectonics and biodiversity

Earth surface processes, such as surface uplift and continental paleoenvironments, can be quantified using stable isotope geochemistry (δ13C and δ18O) on proxy materials such as (soil) carbonates and fossil mammal tooth enamel.

The Central Anatolian Plateau (CAP, Turkey, elevation ca. 1–1.5 km) is located within the Africa/Arabia-Eurasia collision zone and is presently bordered by mountain ranges to its north and south. The CAP exposes vast areas of undeformed late Neogene fluvio-lacustrine sedimentary rocks.

Stable isotope-based paleoaltimetry and improved dating of the fluvio-lacustrine sequences along with a review of the tectonic evolution of the region, reveal that CAP surface uplift occurred after 11 Ma as a result of the removal of lithospheric mantle, whereas 8-5 Ma rapid surface uplift of the southern plateau margin to similar-to-present elevations (ca. 2 km) resulted from crustal thickening. Integrating geological data with records of mammal diversity shows that surface uplift of the plateau interior led to a turnover in large mammal species.

These results highlight how the drivers of Earth surface processes and their interactions with the Earth’s mantle-crust and biosphere can be analyzed by simultaneously assessing the tectonic evolution and regional biodiversity of a region.

Ihr wünscht Euch ein bestimmtes Vortragsthema in unserer Kolloquienreihe oder wollt selbst einen Vortrag halten, dann meldet Euch bei uns unter beirat [at] gestein [dot] org