The great antiquity of the Atacama Desert means that some questions about its geological evolution are beyond the capabilities of current dating methods. New techniques need to be developed to allow us and others to answer these questions. Establishing several new techniques that are able to date old sediments geochronometers is the aim of this project. One of the sample types we are using is micrometeorites. These are tiny extra-terrestrial rock particles that continually rain down on the Earth. Their preservation in the Atacama Desert sediments suggests they could be used as a tool to record environmental change, provided we can date when they landed on the Earth. As part of this we are working towards measuring cosmogenic 53 Mn at the University of Cologne, which can currently only be performed in two laboratories worldwide. You need JavaScript enabled to view it. Log in. Remember Me. Project Introduction D1 — Cosmogenic Nuclides. Dating of old continental sediments in arid environments The great antiquity of the Atacama Desert means that some questions about its geological evolution are beyond the capabilities of current dating methods. Publication: Ritter, B. Dissertation B. Ritter Landscape and climate evolution in arid to hyperarid climates with special focus on the Atacama Desert. Cosmogenic nuclide dating und Stadtbibliothek Universität zu Köln. Ritter, B. Neogene fluvial landscape evolution in the hyperarid core of the Atacama Desert. Nature Scientific Reports. You are here: Home News Project Introduction D1 — Cosmogenic Nuclides. Contact Speaker: Prof. Tibor J. Dunai Institute of Geology and Mineralogy University of Cologne Zülpicher Str. Martin Melles Institute of Geology and Mineralogy University of Cologne Zülpicher Str. Benedikt Ritter Institute of Geology and Mineralogy University of Cologne Zülpicher Str. Partners Chile. Partners Namibia. Main News Jobs Projects Data IRTG. Speaker: Prof. Managing Director: Christian Tiede Institute of Geology and Mineralogy University of Cologne Zülpicher Str. Co-Speaker: Cosmogenic nuclide dating. Scientific Coordinator: Dr. Webmaster: Tim Schlüter Institute of Geography University of Cologne Otto-Fischer-Str.
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Abstract: The method of surface exposure dating using in-situ produced cosmogenic nuclides has become an important and widely applied tool in Quaternary. Project F1 has two main components, each with focus on establishing highprecision chronologies based on radiometric dating methods. Dating of old continental sediments in arid environments. The first component involves. This study focuses on the dating of boulders and rock surfaces by means of paired (Be/ Al) in-situ produced cosmogenic nuclides in two mountain ranges. The great antiquity of the Atacama Desert means that some questions about its geological evolution.Contact Speaker: Prof. Förderprogramm DFG - Sonderforschungsbereiche. The extracted Al and Be hydroxides are converted into oxides and the samples are sent to accelerator mass spectromenry for analysis. Notwendige Cookies werden für grundlegende Funktionen der Webseite benötigt, um eine optimale Nutzung zu ermöglichen. Establishing several new techniques that are able to date old sediments geochronometers is the aim of this project. The different production rates and decay rates of 26Al and 10Be in combination with the burial depth can be used to calculate the time of capping. This slow incision persisted until around kyr ago, whereupon rates of downcutting increased by around an order of magnitude. Öffnen Dropdown öffnen Speichern. Statistik Cookies zulassen. Both isotopes are formed — analogue to other cosmogenic nuclides like 14C, 36Cl, 3He - at the earths surface in exposed rocks by the transformation of elements Si and O induced by high-energy cosmic rays. Show menu Hide menu. Seite drucken. Verbundprojekt SFB Unser Weg nach Europa: Kultur-Umwelt Interaktion und menschliche Mobilität im Späten Quartär. Analogue, sediment deposition on top of once exposed rocks results in a decrease of cosmogenic nuclides production and increase of decay. Mitgliedschaft GeoShop Spenden Forum. Mitwirkende Einrichtungen Institut für Geologie und Mineralogie. Former lab staff: Priv. Markus Fiebig Peter Jordan Strasse 82, Wien Mail: stephanie. Erforderliche Cookies. Tibor J. Alpine glaciers erode material from the bedrock, transport it within the ice towards the valley and finally deposit rock at the ice margin, creating linear sediment deposits moraines that delineate the ice margin. They opened new dating horizons for different kinds of fluvial archives at distinct time scales and thereby provided new insights into previously unanswered questions. Surface exposure dating glacial geomorphology geochronology high mountain research. Research Focus Select topic Laboratory for cosmogenic nuclide extraction — Team » — Mission statement — Research projects » — Laboratory for cosmogenic nuclide extraction — OSL Laboratory. If once exposed rock is buried deep and shielded from cosmic ray influence, for example due to transport into the subsurface cave , the production of cosmogenic nuclides stops and the nuclides decay following their individual half-life and the time of sediment transport into a cave can be determined. Statistik Cookies. Close Search. Für die Erfassung von Zugriffszahlen nutzen wir die Software Matomo. Datenschutzerklärung Impressum. Förderer Deutsche Forschungsgemeinschaft e. Log in. In this contribution, we discuss how the timing of the Tiliviche River incision rate increase may relate to tectonic mechanisms, both local faulting and with regards to proposed increases in regional scale crustal uplift. You need JavaScript enabled to view it. Darüber hinaus können Sie Cookies für Statistikzwecke zulassen. Erweiterte Suche Filter Allgemeine Suche.
