Sökning: "source lithologies"

Hittade 2 uppsatser innehållade orden source lithologies.

1. 1. First-arrival traveltime tomography of active-source data in the Kansanshi copper mine, northern Zambia

   Magister-uppsats, Uppsala universitet/Geofysik

   Författare :Vessela Hobson; [2019]
   Nyckelord :refraction seismics; tomographic inversion; Zambian Copperbelt; copper;

   Sammanfattning : Sedimentary rock-hosted deposits are a major source of copper and cobalt, with the Neoproterozoic central African Copperbelt being among the largest Cu-Co provinces in the world, accounting for around 15% of its copper resource. The deposits occur primarily in the carbonates and siliciclastic sediments overlying the basement, and formed during early diagenesis (around 820 Ma) and late diagenesis/metamorphism during the Pan-African Orogeny (580-520 Ma). LÄS MER

3. 2. Mineral Constraints on the Source Lithologies at Fogo, Cape Verde.

   Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

   Författare :Elin Rydeblad; [2018]
   Nyckelord :olivine; clinopyroxene; carbonatite; Cape Verde; Eclogite; source lithologies;

   Sammanfattning : Variations in major, minor, and trace elements compositions and ratios, as well as isotope ratios are all useful tools in studying the composition of the Earth’s mantle, and heterogeneities present therein. Since the mantle itself doesn’t easily lend itself to study, ocean island basalt (OIBs) are commonly used as a proxy due to compositional differences combined with the range of origination depth, a combination that allows them to represent the heterogeneity of the mantle, sampling everything from the core mantle boundary to the old or recent additions of recycled oceanic crust. LÄS MER