Search Results - "Jegen, Marion"

3D characterisation and quantification of an offshore freshened groundwater system in the Canterbury Bight by Micallef, Aaron, Person, Mark, Haroon, Amir, Weymer, Bradley A., Jegen, Marion, Schwalenberg, Katrin, Faghih, Zahra, Duan, Shuangmin, Cohen, Denis, Mountjoy, Joshu J., Woelz, Susanne, Gable, Carl W., Averes, Tanita, Kumar Tiwari, Ashwani

“…Although offshore freshened groundwater (OFG) systems have been documented in numerous continental margins worldwide, their geometry, controls and emplacement…”
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Evaluation of gas hydrate deposits in an active seep area using marine controlled source electromagnetics: Results from Opouawe Bank, Hikurangi Margin, New Zealand by Schwalenberg, Katrin, Haeckel, Matthias, Poort, Jeffrey, Jegen, Marion

“…Several known gas seep sites along the Hikurangi Margin off the east coast of New Zealand were surveyed by marine controlled source electromagnetic (CSEM)…”
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Hunting for the Tristan mantle plume – An upper mantle tomography around the volcanic island of Tristan da Cunha by Schlömer, Antje, Geissler, Wolfram H., Jokat, Wilfried, Jegen, Marion

“…The active volcanic island Tristan da Cunha, located at the southwestern and youngest end of the Walvis Ridge – Tristan/Gough hotspot track, is believed to be…”
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Magnetotelluric image of the fluid cycle in the Costa Rican subduction zone by Taylor Castillo, Waldo, Brasse, Heinrich, Worzewski, Tamara, Jegen, Marion, Kopp, Heidrun

“…Fluids entering the subduction zone play a key role in the subduction process. They cause changes in the dynamics and thermal structure of the subduction zone,…”
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Seafloor evidence for pre-shield volcanism above the Tristan da Cunha mantle plume by Geissler, Wolfram H., Wintersteller, Paul, Maia, Marcia, Strack, Tonke, Kammann, Janina, Eagles, Graeme, Jegen, Marion, Schloemer, Antje, Jokat, Wilfried

“…Tristan da Cunha is assumed to be the youngest subaerial expression of the Walvis Ridge hot spot. Based on new hydroacoustic data, we propose that the most…”
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Automated Seafloor Massive Sulfide Detection Through Integrated Image Segmentation and Geophysical Data Analysis: Revisiting the TAG Hydrothermal Field by Haroon, Amir, Paasche, Hendrik, Graber, Sebastian, Petersen, Sven, Attias, Eric, Jegen, Marion, Gehrmann, Romina, Hölz, Sebastian, Klischies, Meike

“…Accessible seafloor minerals located near mid‐ocean ridges are noticed to mitigate the projected metal demands of the net‐zero energy transition, promoting…”
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Thickness of the oceanic crust, the lithosphere, and the mantle transition zone in the vicinity of the Tristan da Cunha hot spot estimated from ocean-bottom and ocean-island seismometer receiver functions by Geissler, Wolfram H., Jokat, Wilfried, Jegen, Marion, Baba, Kiyoshi

“…The most prominent hotspot in the South Atlantic is Tristan da Cunha, which is widely considered to be underlain by a mantle plume. But the existence, location…”
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Offshore Freshened Groundwater in Continental Margins by Micallef, Aaron, Person, Mark, Berndt, Christian, Bertoni, Claudia, Cohen, Denis, Dugan, Brandon, Evans, Rob, Haroon, Amir, Hensen, Christian, Jegen, Marion, Key, Kerry, Kooi, Henk, Liebetrau, Volker, Lofi, Johanna, Mailloux, Brian J., Martin‐Nagle, Renée, Michael, Holly A., Müller, Thomas, Schmidt, Mark, Schwalenberg, Katrin, Trembath‐Reichert, Elizabeth, Weymer, Bradley, Zhang, Yipeng, Thomas, Ariel T.

“…First reported in the 1960s, offshore freshened groundwater (OFG) has now been documented in most continental margins around the world. In this review we…”
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The marine controlled source electromagnetic response of a steel borehole casing: applications for the NEPTUNE Canada gas hydrate observatory by Swidinsky, Andrei, Edwards, R. Nigel, Jegen, Marion

“…ABSTRACT Gas hydrates are a potential energy resource, a possible factor in climate change and an exploration geohazard. The University of Toronto has deployed…”
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100- kyr cyclicity in volcanic ash emplacement: evidence from a 1.1 Myr tephra record from the NW Pacific by Schindlbeck, Julie C., Jegen, Marion, Freundt, Armin, Kutterolf, Steffen, Straub, Susanne M., Mleneck-Vautravers, Maryline J., McManus, Jerry F.

“…It is a longstanding observation that the frequency of volcanism periodically changes at times of global climate change. The existence of causal links between…”
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Approximations for the 2‐D coast effect on marine magnetotelluric data by Worzewski, Tamara, Jegen, Marion, Swidinsky, Andrei

“…SUMMARY Marine natural source electromagnetic data acquired on continental margins are often of considerable scientific and commercial interest. However, the…”
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3D Characterization of a Coastal Freshwater Aquifer in SE Malta (Mediterranean Sea) by Time-Domain Electromagnetics by Pondthai, Potpreecha, Everett, Mark E., Micallef, Aaron, Weymer, Bradley A., Faghih, Zahra, Haroon, Amir, Jegen, Marion

“…Electromagnetic (EM) geophysical methods are well equipped to distinguish electrical resistivity contrasts between freshwater-saturated and seawater-saturated…”
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Multi-Layered High Permeability Conduits Connecting Onshore and Offshore Coastal Aquifers by Weymer, Bradley A., Wernette, Phillipe A., Everett, Mark E., Pondthai, Potpreecha, Jegen, Marion, Micallef, Aaron

“…Groundwater resources in coastal regions are facing enormous pressure caused by population growth and climate change. Few studies have investigated whether…”
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High-resolution resistivity imaging of marine gas hydrate structures by combined inversion of CSEM towed and ocean-bottom receiver data by Attias, Eric, Weitemeyer, Karen, Hölz, Sebastian, Naif, Samer, Minshull, Tim A, Best, Angus I, Haroon, Amir, Jegen-Kulcsar, Marion, Berndt, Christian

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Controlled-source electromagnetic and seismic delineation of subseafloor fluid flow structures in a gas hydrate province, offshore Norway by Attias, Eric, Weitemeyer, Karen, Minshull, Tim A., Best, Angus I., Sinha, Martin, Jegen-Kulcsar, Marion, Hölz, Sebastian, Berndt, Christian

“…Deep sea pockmarks underlain by chimney-like or pipe structures that contain methane hydrate are abundant along the Norwegian continental margin. In such…”
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Preliminary interpretation of electromagnetic, heat flow, seismic, and geochemical data for gas hydrate distribution across the Porangahau Ridge, New Zealand by Schwalenberg, Katrin, Wood, Warren, Pecher, Ingo, Hamdan, Leila, Henrys, Stuart, Jegen, Marion, Coffin, Richard

“…Porangahau Ridge, located offshore the Wairarapa on the Hikurangi Margin, is an active ocean-continent collision region in northeastern New Zealand coastal…”
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The coastal transition zone is an underexplored frontier in hydrology and geoscience by Weymer, Bradley A., Everett, Mark E., Haroon, Amir, Jegen-Kulcsar, Marion, Micallef, Aaron, Berndt, Christian, Michael, Holly A., Evans, Rob L., Post, Vincent

“…Abstract We have better maps of the surfaces of Venus, Mars, and the Moon than of the Earth’s seafloor. There is even less information available about the…”
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A framework for 3-D joint inversion of MT, gravity and seismic refraction data by Moorkamp, Max, Heincke, Björn, Jegen, Marion, Roberts, Alan W., Hobbs, Richard W.

“…Summary We present a 3-D joint inversion framework for seismic, magnetotelluric (MT) and scalar and tensorial gravity data. Using large-scale optimization…”
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Study on gas hydrate targets in the Danube Paleo-Delta with a dual polarization controlled-source electromagnetic system by Duan, Shuangmin, Hölz, Sebastian, Dannowski, Anke, Schwalenberg, Katrin, Jegen, Marion

“…The Black Sea is known to have extensive direct and indirect indicators of methane hydrates. Since the resistivity of the seafloor increases significantly in…”
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An adaptive coupling strategy for joint inversions that use petrophysical information as constraints by Heincke, Björn, Jegen, Marion, Moorkamp, Max, Hobbs, Richard W., Chen, Jin

“…Joint inversion strategies for geophysical data have become increasingly popular as they allow for the efficient combination of complementary information from…”
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