Essays about: "seismic refraction"

Showing result 1 - 5 of 10 essays containing the words seismic refraction.

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

    University essay from Uppsala universitet/Geofysik

    Author : Vessela Hobson; [2019]
    Keywords : refraction seismics; tomographic inversion; Zambian Copperbelt; copper;

    Abstract : 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). READ MORE

  3. 2. Determining shallow P-wave velocity and its engineering implication in Adama City, Ethiopia

    University essay from Uppsala universitet/Geofysik; Uppsala universitet/Institutionen för teknikvetenskaper

    Author : Tasnim Laskar; [2019]
    Keywords : Ethiopia; seismic refraction; earthquake;

    Abstract : A great number of the urban areas in Ethiopia are situated within the Great Rift Valley of Ethiopia, a system consisting of depressions and large faults. As a region with significant seismic activities, it is vital that careful planning is implemented to avoid constructing buildings on flat surfaces as they can amplify ground motion in the case of an earthquake. READ MORE

  4. 3. Characterizing Subsurface Structure of Two Contrasting Sites in the Main Ethiopian Rift

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Ebba Hansson; [2019]
    Keywords : Ethiopia; Main Ethiopian Rift; seismic refraction; subsurface structure;

    Abstract : The Main Ethiopian Rift is a part of the East African Rift, from where the African plate is being teared apart and separated from the Indian and the Arabian plate. Even though earthquakes in this area are relatively less frequent, the subsurface structure is a subject of big research interest, since information about the subsurface layers has considerable relevance when it comes to site amplication related to earthquakes. READ MORE

  5. 4. Evaluation of SCPT-surveys as method for accessing dynamic modulus

    University essay from Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Author : Joakim Granskär; [2018]
    Keywords : SCPT; Dynamic modulus; Seismic surveys;

    Abstract : The purpose of this master thesis is to evaluate the results from the completed SCPT (Seismic Cone Penetration Test) surveys with respect to the methods ability to estimate dynamic young´s modulus. This has been done by comparing the result from SCPT to other seismic methods and dynamic parameters converted from “static” geotechnical surveys. READ MORE

  6. 5. Resistivity and Seismic Characterization of an Embankment Dam. A Case Study in Northern Sweden

    University essay from Uppsala universitet/Geofysik

    Author : Álvaro Polín-Tornero; [2018]
    Keywords : embankment dam; Sweden; ERT; seismic refraction; seismic reflection; modelling; jordfyllningsdamm; Sverige; ERT; seismisk refraktion; seismisk reflektion; modellering;

    Abstract : The main cause of failure in embankment dams - which represent 75% of all dams in the world (ICOLD, 2018) - is the internal erosion produced by excessive seepage not accounted for in their designs. This erosion can cause that a small anomalous structure, not likely to be considered as risky, turns rapidly into a significant structural damage if not recognized on time. READ MORE