Essays about: "retrogression"

Found 5 essays containing the word retrogression.

  1. 1. The “ultramafic” Intrusion’s within the peridotite from Härbergsdalen : Petrological characterization of infiltration record within the lithospheric mantle

    University essay from Uppsala universitet/Mineralogi, petrologi och tektonik

    Author : Per Volter; [2022]
    Keywords : ;

    Abstract : The mantle constitutes ~80% of Earths volume, however, due to its location deep beneath Earth’s surface the mantle is inaccessible to study in situ. Despite this, we still have information about its composition thanks to seismic studies which haven proven the mantle to be in generally homogenous and dominated by a rock called peridotite. READ MORE

  3. 2. Petrographic study of high-grade gneisses, Halland area

    University essay from Stockholms universitet/Institutionen för geologiska vetenskaper

    Author : Diana Carlsson; [2014]
    Keywords : ;

    Abstract : This is a petrographic study of high-grade gneisses in the Halland area, Sweden. During bedrock mapping by the Swedish Geological Survey, three principal petrographically distinct gneiss domains have been recognized: the Skene, Varberg, and Halmstad domain. READ MORE

  4. 3. P-T evolution of paragneisses and amphibolites from Romeleåsen, Scania, southernmost Sweden

    University essay from Lunds universitet/Geologiska institutionen

    Author : Jan Ulmius; [2013]
    Keywords : Romeleåsen; metamorphism; geothermobarometry; pseudosection; Theriak-Domino; P-T path; Hallandian Danopolonian; Sveconorwegian Romeleåsen; metamorfism; geotermobarometri; pseudosektion; P-T-utveckling; halandisk danopolonisk; svekonorvegisk; Earth and Environmental Sciences;

    Abstract : Populärvetenskaplig sammanfattning Vad har berget i Romeleåsen varit med om? Jordskorpan är uppbyggd av ett antal plattor. Vid plattgränser under oceanerna bildas ny skorpa av magma som tränger upp. Oceanplattan kan inte öka i storlek. READ MORE

  5. 4. Metamorphic rocks in a section across a Sveconorwegian eclogite-bearing deformation zone in Halland : characteristics and regional context

    University essay from Lunds universitet/Geologiska institutionen

    Author : Brendan Dyck; [2010]
    Keywords : Ullared Deformation Zone; retrogression; high-grade metamorphism; Sveconorwegian; Eclogite; Earth and Environmental Sciences;

    Abstract : Eclogitized mafic bodies in the Ullared Deformation Zone (UDZ) of SW Sweden are evidence for high-pressure metamorphism and deformation related to continent collision during the Sceconorwegian orogeny. A petrographic study was performed on ten samples taken from a profile transecting the UDZ, with the aim of further characterizing the rocks within the eclogite bearing deformation zone. READ MORE

  6. 5. Structural and U-Pb isotopic age constraints on the tectonothermal evolution at Glassvik, Halland

    University essay from Lunds universitet/Geologiska institutionen

    Author : Ulf Söderlund; [1993]
    Keywords : Sveconorwegian; U-Pb zircon; SW Sweden; geochronology; evaporation; pegmatite dyke; Earth and Environmental Sciences;

    Abstract : The topic of this paper include an attempt to interpret the mutually timing of the tectonothermal events at Glassvik, considered to constitute a key locality in the southern part of the Southwestern Granulite Province (SGP). The province is characterized by numerous occurrences of mafic granulites and charnockites as well as high-grade gneisses of a polymetamorphic origin. READ MORE