Sedimentary Petrology

Formed from the weathering +erosion, transportation and deposition of igneous and metamorphic rocks
Main controls on weathering
1. Local weather conditions/ climate
  1. Physical/ Chemical properties of the parent rock
    1. Relief and morphology of land forms
      1. Vegetation type/ cover
Methods of transportaion
1. Gravity
  1. Water
    1. Wind
      1. Ice
2. The power and material available influences whether they transport material as aggregates or particles
Different transporting agents modify the grains
1. Reduction in size
  1. Increase in roundness
    1. Changes to surface texture
      1. Sorting of grains
        Continued weathering
Mineral maturity
1. Super mature - Quartz
  1. Mature - Quartz + other minor constituents
    1. Quartz, feldspar, mica + rare lithic grains
      1. Range of lithic grains + other materials
Siliclastic rocks
1. Burial = compaction
  1. Reduced pore spaces
    1. Grain deformation (plastic, flexive, pressure)
      1. Production of psuedomatrix
        Dewatering
Cementation
1. Calcite
  1. Silica
    1. Iron Oxide
Causes of diagenetic change
1. Chemistry of the environment
  1. Depth of burial
    1. Temperature
      1. Pressure

Resumo de Recurso

	Criado por jess.y1994 mais de 11 anos atrás