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  • 1
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    Isotopen- und Spurenelementuntersuchungen von geologischen Systemen (1997)
    Ernst & Sohn
    In:  Geowissenschaften, 15 (9). pp. 306-309.
    Details
    Publication Date: 2018-12-20
    Description: Thermal Ionization Mass Spectrometry (TIMS) and Synchrotron X-Ray Fluoresence (SYXRF) are two methods for analyzing the isotope and trace element compositions of geological materials (e.g. rocks and fluids), in order to reconstruct their origin and history. We present several examples of how geological problems can be solved using these analytical methods: 1) age-dating of the oceanic crust beneath Gran Canaria (Canary Islands) using the Sm-Nd isotopic system, 2) tracing the origin of volcanic seamounts, ridges and ophiolites along the Pacific margin of Costa Rica with radiogenic isotope systems (Sr, Nd and Pb), 3) evaluating the role of seawater alteration on the composition of the oceanic crust using B isotopes, and 4) determining the input of halogens and other elements into the stratosphere during volcanic eruptions and assessing their effect on the ozone layer.
    Type: Article , PeerReviewed
    Format: text
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  • 2
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    Vulkaninseln als ozeanische Geosysteme (1997)
    Ernst & Sohn
    In:  Geowissenschaften, 15 (9). pp. 301-305.
    Details
    Publication Date: 2020-02-13
    Description: The structural, temporal, compositional and volcanic evolution of oceanic intraplate islands is one of the major research areas in our department. A regional focus is on the island groups and seamounts along the passive margin off Northwest Africa. The Canary Islands which are characterized by an unususally large compositional spectrum of igneous rocks and long magmatic histories, exceeding 20 Ma in some islands, are the main target area for our ongoing combined on- and offshore studies. We here report on specific events and stages in the structural and chemical evolution of the island of Gran Canaria and its sedimentary apron using a variety of methods. Detailed studies of constructive and destructive processes during island evolution have allowed to predict - and verify by deep sea drilling - the submarine and subaerial evolution of Gran Canaria and its surrounding sedimentary basins. Our aim is to develop a globally representative model explaining the evolution of volcanic islands including aspects of volcanic hazards related to explosive eruptions and tsunamis triggered by island flank collapses.
    Type: Article , PeerReviewed
    Format: text
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