A5011152663- Geological and Geochemical Analysis
- earthquake and tectonic studies
- Geology and Paleoclimatology Research
- High-pressure geophysics and materials
- Geochemistry and Geologic Mapping
- Geological and Geophysical Studies
- Geological Studies and Exploration
- Methane Hydrates and Related Phenomena
- Paleontology and Stratigraphy of Fossils
- Geological and Tectonic Studies in Latin America
- Geochemistry and Elemental Analysis
- Hydrocarbon exploration and reservoir analysis
- Geological and Geophysical Studies Worldwide
- Astro and Planetary Science
- Geological formations and processes
- Marine and environmental studies
- Mineralogy and Gemology Studies
- Botany and Geology in Latin America and Caribbean
- Geomagnetism and Paleomagnetism Studies
- Geological Formations and Processes Exploration
- Atmospheric and Environmental Gas Dynamics
- Isotope Analysis in Ecology
- Glass properties and applications
- Geotechnical and Geomechanical Engineering
- Planetary Science and Exploration
GEOMAR Helmholtz Centre for Ocean Research Kiel
2016-2025
GEOMAR Technologie GmbH - GTG
1997-2020
Kiel University
2008
Leibniz Association
2004-2006
We report Sr, Nd and Pb isotopic compositions of sediments variably altered igneous rocks from ODP Site 801 (Marianas) 1149 (Izu‐Bonin). These Sites provide the most complete drilled ocean crust sections located in front Mariana Izu‐Bonin trenches characterize unmodified input into these subduction zones. The subducted belongs to oldest (130–167 Ma) situ Pacific Ocean thus has end‐member character with respect alteration sediment load. lithostratigraphic division sedimentary units at clays,...
Research Article| September 01, 2002 Missing history (16–71 Ma) of the Galápagos hotspot: Implications for tectonic and biological evolution Americas Kaj Hoernle; Hoernle 1GEOMAR, Wischhofstrasse 1-3, 24148 Kiel, Germany Search other works by this author on: GSW Google Scholar Paul van den Bogaard; Bogaard Reinhard Werner; Werner Britta Lissinna; Lissinna Folkmar Hauff; Hauff Guillermo Alvarado; Alvarado 2Instituto Costarricense de Electricidad, Apartado 10032-1000, Costa Rica Dieter...
The age and origin of magmatic complexes along the Pacific Coast Central America have important implications for tectonic evolution this convergent plate margin. Here we present new 40 Ar/ 39 Ar laser dates, major trace element data, initial Sr‐Nd‐Pb isotope ratios. 124–109 Ma tholeiitic portions Santa Elena complex formed in a primitive island arc setting, believed to be part Chortis subduction zone. geochemical similarities between Tortugal alkaline volcanic rocks suggest that block may...
Abstract Increasingly, spatial geochemical zonation, present as geographically distinct, subparallel trends, is observed along hotspot tracks, such Hawaii and the Galapagos. The origin of this zonation currently unclear. Recently was found last ∼70 Myr Tristan-Gough track. Here we new Sr–Nd–Pb–Hf isotope data from older parts track (Walvis Ridge Rio Grande Rise) re-evaluate published Etendeka Parana flood basalts erupted at initiation We show that only enriched Gough, but not less-enriched...
Research Article| March 01, 2009 Flow of Canary mantle plume material through a subcontinental lithospheric corridor beneath Africa to the Mediterranean S. Duggen; Duggen * 11IFM-GEOMAR, Leibniz Institute Marine Sciences, Division Dynamics Ocean Floor, Wischhofstrasse 1-3, 24148 Kiel, Germany 22Department Earth Royal Holloway University London, Egham, Surrey TW20 OEX, UK *E-mail: sduggen@ifm-geomar.de. Search for other works by this author on: GSW Google Scholar K.A. Hoernle; Hoernle F....
A wide variety of different rock types were dredged from the Tonga fore arc and trench between 8000 3000 m water depths by 1996 Boomerang voyage. 40 Ar‐ 39 Ar whole U‐Pb zircon dating suggest that these rocks erupted episodically Cretaceous to Pliocene (102 2 Ma). The geochemistry suggests MOR‐type basalts dolerites in Cretaceous, island tholeiites Eocene back basin tholeiite boninite after this time. ages generally become younger northward suggesting crust was created south at around 48–52...
The Hrvatsko Zagorje Basin, represents a part of the Slovenian Strait, an Oligocene-Middle Miocene seaway connection between Central Paratethys and Mediterranean. Volcanic deposits within basin are key geochronological markers for understanding evolution this important segment Paratethyan realm. timing, eruption styles, magma characteristics, depositional environments these events, however, remain poorly understood. In study, we investigate volcaniclastic sequences from Donje Jesenje...
Research Article| August 01, 2004 70 m.y. history (139–69 Ma) for the Caribbean large igneous province Kaj Hoernle; Hoernle 1Dynamics of Ocean Floor, Leibniz Institute Marine Sciences (IFM-GEOMAR), Wischhofstrasse 1-3, 24148 Kiel, Germany Search other works by this author on: GSW Google Scholar Folkmar Hauff; Hauff Paul van den Bogaard Author and Article Information Publisher: Geological Society America Received: 13 Feb Revision 16 Apr Accepted: 17 First Online: 02 Mar 2017 Online ISSN:...
We report results of magnetic data from the Nazca Plate and geochemical (major element Sr‐Nd‐Pb‐isotope) analyses rocks dredged Galápagos hot spot tracks (Cocos, Carnegie, Malpelo Coiba Ridges adjacent seamounts) in Central East Pacific. Magnetic anomalies indicate that Carnegie were once attached seafloor spreading separated two ridges between 14.5 Ma 9.5 Ma. The variations Sr‐Nd‐Pb isotopic composition show three mantle components currently observed at (Central, Southern, Eastern) existed...
Although most Central American magmas have a typical arc geochemical signature, in southern America (central Costa Rica and Panama) isotopic trace element compositions with an ocean island basalt (OIB) affinity, similar to the Galapagos‐OIB lavas (e.g., Ba/La < 40, La/Yb > 10, 206 Pb/ 204 Pb 18.8). Our new data for suggest that this unusual convergent margin, has relatively recent origin (Late Miocene ∼6 Ma). We also show there was transition from (analogous modern Nicaraguan volcanic...
We report δ 44/40 Ca (SRM 915a) values for eight fused MPI‐DING glasses and the respective original powders, six USGS igneous rock reference materials, U‐Th disequilibria material TML, IAEA‐CO1 (Carrara marble) several rocks (komatiites carbonatites). Sample selection was guided by three considerations: (1) to address need information on materials that are widely available in support of interlaboratory comparison studies; (2) development situ laser ablation ion microprobe techniques, which...