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Sterionet projection of 3-D structural data

Sterionet projection of 3-D structural data. • Stereonet basics • plotting lines and planes • Some example problem and solutions. Lower hemisphere of a sphere projected onto a flat surface. • a type of ‘3-dimensional protractor’ • allows analysis of structural data in 3-dimensions

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Sterionet projection of 3-D structural data

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  1. Sterionet projection of 3-D structural data

  2. • Stereonet basics • plotting lines and planes • Some example problem and solutions

  3. Lower hemisphere of a sphere projected onto a flat surface • a type of ‘3-dimensional protractor’ • allows analysis of structural data in 3-dimensions • plot data on tracing paper overlaid on net

  4. Elements of a Stereonet Great Circles - large circular arcs running north-south • equivalent to lines of longitude on globe Small Circles - circular arcs running from east to west • equivalent to lines of latitude on globe

  5. Elements of a Stereonet Primitive - the perimeter of the stereonet • divided into 360 degrees at 2 ° increments • perimeter indicates compass directions

  6. Two types of stereonets used geology: 1. Schmidt net 2. Wulff net

  7. Plot the plane Strike 30º, and Dip 60º

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