Sökning: "volcanism"

Visar resultat 1 - 5 av 27 uppsatser innehållade ordet volcanism.

1. 1. Stratigraphy and palaeoenvironment of the early Jurassic volcaniclastic strata at Djupadalsmölla, central Skåne, Sweden

   Master-uppsats, Lunds universitet/Geologiska institutionen

   Författare :Per Wahlquist; [2023]
   Nyckelord :volcaniclastic; Djupadalsmölla; CSVP; palynomorphs; early Jurassic; late Pliensbachian; Earth and Environmental Sciences;

   Sammanfattning : From the almost 200 volcanic outcrops in the Central Skåne Volcanic Province (CSVP), only three are of volcaniclastic material. These volcanoclastics, and the transition to the underlying crystalline basement, have been investigated for the first time in a drill core (KBH2) from Djupadalsmölla in order to understand the stra-tigraphy, depositional process, age of deposition, and depositional environment. LÄS MER

3. 2. Petrography and Mineral Chemistry of the Sälskär Breccia (Alnö Alkaline Complex, Central Sweden)

   Kandidat-uppsats, Uppsala universitet/Institutionen för geovetenskaper

   Författare :Vincent Gustafsson; [2022]
   Nyckelord :Alnö alkaline complex; diatreme; melilitite; pelletal lapilli; volcanic breccia; Alnö alkalina område; diatrem; melilitit; pelletal lapilli; vulkanisk breccia;

   Sammanfattning : Primitive magmas can provide important details about the mantle from which they are derived. In this thesis, petrographic observations and new mineral chemistry analyses of the Sälskär breccia from the Alnö alkaline complex, central Sweden, are reported. LÄS MER

4. 3. Magma Mixing and ReplenishmentBeneath Laurens Peninsula, Heard Island

   Kandidat-uppsats, Uppsala universitet/Institutionen för geovetenskaper

   Författare :Ransom Telson; [2022]
   Nyckelord :Heard Island; Laurens Peninsula; crystal size distribution; magma replenishment; Heard Island; Laurens halvön; kristallstorleksfördelning; magmablandning; påfyllning;

   Sammanfattning : Heard Island is a remote Australian territory which lies in the South-middle sector of the Indian Ocean.The island lies in the central province of the Kerguelen Plateau. On the north-western face of the islandlies the Laurens Peninsula, where modern volcanism has been periodic since approximately 10 ka, butno eruption has been recorded. LÄS MER

5. 4. Record of the end-Triassic mass extinction in shallow marine carbonates: the Lorüns section (Austria)

   Master-uppsats, Lunds universitet/Geologiska institutionen

   Författare :Linus Brakebusch; [2022]
   Nyckelord :sedimentology; geochemistry; ooids; oolites; oncoids; oncolites; Triassic; Jurassic; Rhaetian; Hettangian; ocean acidification; Earth and Environmental Sciences;

   Sammanfattning : The end-Triassic mass extinction (ETE) was one of the five big mass extinctions of the Phanerozoic and occurred ~201 Ma ago. Research agrees that the main triggering factor for the ETE was the eruptions of the Central Atlantic Magmatic Volcanic Province (CAMP), linked to the break-up of the supercontinent Pangaea. LÄS MER

7. 5. Mercury in Fossil Leaves as a Proxy for Tracking Large Igneous Province Volcanism

   Kandidat-uppsats, Uppsala universitet/Institutionen för geovetenskaper

   Författare :Johan Näslund; [2021]
   Nyckelord :;

   Sammanfattning : During some mass extinctions, usually minor, world oceans also underwent anoxic to euxinic conditions, events called Oceanic anoxic events (OAEs). Such an event unfolded during the Toarcian (∼183 Ma), called the T-OAE which is suggested to have been caused by Karoo-Ferrar Large Igneous Province (LIP) volcanism. LÄS MER