Summary: North Sea
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1 Regional Basin Development
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Name the three major tectonic events and place them in time?
Caledonic orogeny Devoon- carboon- permHercynic orogeny Cambrian - ordo-SiluurAlpine orogeny Cretaceous-Tertiair -
Late carboniferous praat met me
Ice house world south pole covered with huge ice sheet gondwana and laurussia had collided to form pangea -
Nederland in late carboniferous
land locked between mountain ranges tropical climate at equatorSediments from the Variscan mountain range in the southwere deposited in a large, fast subsiding, foredeep basinwith sedimentation keeping pace with subsidence(In 30 million years,as much sedimenthad been depositedas in the following300 million years) -
mid triassic ondervond rifting wat had dit tot gevolg?
Salt activity eerst kleine verhoginkjes later complete salt diapirs -
2 pre carboniferous
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Waar ligt sneerlands silurian basin?
Zeeland maaar voornamelijk hiaus in nederland tot midden devoon. daarvoor caledonian basement -
Devoon afzettingen en opmerkelijkheden nederland
midden devoon: carbonaten en old red grouplate devoon: old red group (offshore nederland) en banjaard groep (onshore nederland)mass extinctie aan einde ( unknown) -
daarna namurian sequentie hoe was situatie nederland
namurian is afgezet als shales in troughs tussen carbonate reefs -
Name the slochteren member sequence in rotliegend
ten boer member flooding eventupper slochteren more lakeameland member flooding eventlower slochteren -
Zechstein Play elements
HC-source rock: Westphalian coals,Kupferschiefer & ZE high TOCcarbonates.- Migration routes: permeable rock orfaults of/in the Carboniferous andRotliegend.- Reservoir rock: porous and fracturedZechstein carbonates and sandstones- Seal: Zechstein evaporites.- Structure: fault-dip closures at base -
Precipitation model of the zechstein evaporites?
anhydrite deposition margin os shallow basin-> subsidence -> more anhydrite -> further subsidence -> creates deep basin where halite can percipitate
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