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X-WR-CALNAME:Geolunch seminar @ UiB
X-ORIGINAL-URL:https://geolunch.w.uib.no
X-WR-CALDESC:Events for Geolunch seminar @ UiB
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BEGIN:VEVENT
DTSTART;TZID=Europe/Oslo:20240205T131500
DTEND;TZID=Europe/Oslo:20240205T143000
DTSTAMP:20260428T215146
CREATED:20240205T085423Z
LAST-MODIFIED:20240205T085423Z
UID:879-1707138900-1707143400@geolunch.w.uib.no
SUMMARY:Prof Derek Schutt
DESCRIPTION:The Enigmatic Mackenzie Mountains \nProf Derek Schutt\, from Colorado State University \nGlobal-scale seismic velocity models of the Northern Canadian Cordillera show high velocities to the east of the Cordilleran deformation front and low velocities to the west.    This velocity contrast is consistent with other geophysical observables\, such as regional seismological studies\, that indicate a weak and thin lithosphere to the west that transitions quickly to a strong and thick craton-like lithosphere at the deformation front.    We present new results using data collected by the Mackenzie Mountains EarthScope Project\, which included an ~875 km-long line of 40 broadband seismographs across the Cordillera and into the craton extending from roughly Skagway\, Alaska to Great Bear Lake\, Northwest Territories.    The 3-year overlap of this deployment with other broadband seismic stations in the region\, most notably the EarthScope Transportable Array and the Yukon Northwest Seismic Network\, allows for detailed imaging of the upper lithosphere.    Results show large velocity variations west of the deformation front.   Notably\, we image a 5% Vs low that extends from the upper crust to the asthenospheric mantle.   This plume-like structure\, and associated weakening\, may be a primary cause for the ongoing uplift of the Mackenzie Mountains at their unusually eastward location.   We also image a low velocity feature in the lower crust extending to the west of the deformation front\, which may facilitate eastward crustal translation along a large-scale (~800 km) decollement system driven by the Yakutat indentor consistent with the orogenic float hypothesis of Mazzotti and Hyndman (2002).    We note strong lithosphere-scale lateral heterogeneity suggesting that 3-D effects are important in focusing deformation in the Mackenzie Mountain area.
URL:https://geolunch.w.uib.no/event/prof-derek-schutt/
LOCATION:Jøkulen (2nd floor classroom)\, Allegaten 41\, Bergen\, 5020\, Norway
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DTSTART;TZID=Europe/Oslo:20240207T121500
DTEND;TZID=Europe/Oslo:20240207T130000
DTSTAMP:20260428T215146
CREATED:20231119T201124Z
LAST-MODIFIED:20240205T085729Z
UID:821-1707308100-1707310800@geolunch.w.uib.no
SUMMARY:Carbon Capture and Storage (CCS) projects
DESCRIPTION:Carbon Capture and Storage (CCS) projects \n(1) Insights into CO2 storage using the FluidFlower\nby Espen Tjessheim (Master student project) \n5-10 min\, more details there \n(2)  Building confidence in subsurface geological carbon dioxide storage \nby Md Jamilur Rahman (New post-doc at UiB)
URL:https://geolunch.w.uib.no/event/msc-students/
LOCATION:Kontinentalsokkelen (2G16e)\, Realfagbygget\, Allégaten 41\, Bergen\, 5007\, Norway
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DTSTART;TZID=Europe/Oslo:20240214T121500
DTEND;TZID=Europe/Oslo:20240214T130000
DTSTAMP:20260428T215146
CREATED:20231119T201211Z
LAST-MODIFIED:20240213T144748Z
UID:823-1707912900-1707915600@geolunch.w.uib.no
SUMMARY:Peter Hanssen
DESCRIPTION:Marine Vibrators and Advances in Offshore Seismic Technologies \nPeter Hanssen \nMarine vibrators have been developed and tested by several companies in recent years and it is anticipated that a commercial system will be available as early as next year. The new\, more environmentally friendly sources are also more efficient and could provide better data in the overall picture of offshore robotization. This presentation will give an overview of the technology\, its advantages over airgun-based sources\, and new challenges concerning processing and acquisition.
URL:https://geolunch.w.uib.no/event/peter-hanssen/
LOCATION:Kontinentalsokkelen (2G16e)\, Realfagbygget\, Allégaten 41\, Bergen\, 5007\, Norway
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DTSTART;TZID=Europe/Oslo:20240221T121500
DTEND;TZID=Europe/Oslo:20240221T130000
DTSTAMP:20260428T215146
CREATED:20231119T201352Z
LAST-MODIFIED:20240219T083927Z
UID:825-1708517700-1708520400@geolunch.w.uib.no
SUMMARY:Matteo Demurtas
DESCRIPTION:A thirsty fault: prolonged fluid flow along the Helmsdale Fault \nMatteo Demurtas \nWithin syn-rift basins\, the juxtaposition of rift-related clastic deposits in the hanging wall of basin-bounding normal faults against crystalline basement is a recurrent structural setting where plays can be found. Here\, fault-controlled fluid flow can exert a major role on fluid pathways by means of mineralization and cementation of the host rock.\nThe Helmsdale Fault in NE Scotland is an excellent exhumed example of a syn-rift basin bounding fault\, where timing and paragenesis of fluid flow can be studies in details. The Helmsdale Fault bounds the western side of the Inner Moray Firth Basin in NE Scotland\, which developed during rifting in the Late Jurassic. The hanging wall of the Helmsdale Fault consists of Late Jurassic Helmsdale Boulder Beds that are made of alternating debris flow to fault scarp deposits\, whereas the footwall is composed of the Helmsdale Granite (Silurian-Devonian in age). Significant fluid flow along the Helmsdale Fault is testified by widespread calcite veining\, locally making up to 5 m thick fault cores of stacked veins. A complete suite of microanalysis including optical microscopy\, clumped isotope\, geochronological analysis as well as fluid inclusion analysis suggests a high variability in time and space of fault-controlled fluid flow\, and possibly a more complex deformation history than what previously though.
URL:https://geolunch.w.uib.no/event/matteo-demurtas-3/
LOCATION:Kontinentalsokkelen (2G16e)\, Realfagbygget\, Allégaten 41\, Bergen\, 5007\, Norway
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