Essays about: "plagioklas"
Showing result 6 - 10 of 20 essays containing the word plagioklas.
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6. Genetic relationships and origin of the Ädelfors gold deposits in Southeastern Sweden
University essay from Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurserAbstract : Ädelfors is situated ca 17 km east of Vetlanda, Jönköping County, in the N-S striking Trans-scandinavian igneous belt and is a part of the NE-SW striking 1.83-1.82 Ga Oskarshamn-Jönköping belt emplaced during a continental subduction towards the Svecofennian continental margin. The continental arc hosts the 1. READ MORE
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7. Magma Evolution of the Cerro Bayo Laccolith in the Chachahuén Volcanic Complex, Argentina
University essay from Uppsala universitet/Institutionen för geovetenskaperAbstract : The Chachahuén volcanic complex, with the Cerro Bayo laccolith as one of the largest intrusions, is part of back-arc Payenia volcanic province in western central Argentina. Laccoliths show potential for generating oil in sedimentary basins and producing ore deposits. READ MORE
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8. Magmatic Sources and Processes Recorded by the Volcanics from the Izu Bonin Rear Arc
University essay from Uppsala universitet/Institutionen för geovetenskaperAbstract : The Izu rear-arc volcanism was investigated by IODP EXP350 in spring 2014. A total stratigraphy of1800 m was drilled, and contains volcaniclastic material within tuffaceous mudstone. READ MORE
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9. Behaviour of Boron Isotopes During Magmatic Degassing and Application to B-Rich Volcanic Glassfrom Lesbos, Greece
University essay from Uppsala universitet/Institutionen för geovetenskaperAbstract : Boron is a fluid mobile trace element and is routinely employed as a tracer of slab-derived fluids in subduction zones since the heavy isotope (11B) preferentially partitions into the fluid phase during slab dehydration. However, it has been shown experimentally that boron isotopes (expressed as δ11B) can fractionate by up to several permil (‰) during subsequent magmatic evolution and degassing at high temperature, calling into doubt the fidelity of boron isotopes in volcanic glass as accurate tracers of slab degassing. READ MORE
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10. Relationship Between Hekla’s Magmatic System and Its Eruptive Behavior
University essay from Uppsala universitet/Institutionen för geovetenskaperAbstract : The southern part of Iceland incorporates two parallel volcanic zones, the Eastern Volcanic Zone and the Western Volcanic Zone. These two branches are connected by an E-W transform. Hekla is located close to intersection between the two plate boundaries. Hekla is one of Iceland's most active and explosive volcanoes. READ MORE