1. Lecture Notes:

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Slides with extended notes: HERE - all this material is examinable.
Slides only: HERE
Slides only LARGE file size: HERE

2. Lecture Activity Solution: HERE

3. Required Reading:
Non for this topic

4. Lecture Goals

Note! Lecture goals are intended to help you understand the main themes in the lecture. They are NOT designed as a guide to the exact content that will appear in exams.

i. Describe sandstone and mudstone diagenesis including the production of petroleum

2. ii.Describe and differentiate between various diagenetic environments of limestones
   

3. iii. Review the various models that may account for dolomitization
   

5. Sample Questions (answers given at the bottom of the page)

Note! These questions are drawn from individual lectures. Questions on the exams may draw their content from ACROSS lecture material and not focus on any one specific area as the questions do here.

1. 1.What may suggest that the clay matrix found in a sandstone was diagenetic in origin (authigenic) and not deposited at the same time as the grains?
   

2. 2.Around what depth and temperature is petroleum expelled from an organic rich mudrock? What causes the expulsion of the petroleum?
   
   

3. 3.The grains in this sediment are calcium carbonate echinoid fragments. Describe the cement that is forming around them and suggest a diagenetic zone in which it may be forming.
   

1. The matrix would likely not be present at grain contacts as the clays are growing in the pore spaces between the grains.

2. Between 2.5 - 7km around 70 - 90°C. The release of water from the breakdown of unstable minerals helps expel petroleum from the source rock.

3. Syntaxial overgrowths around the echinoid fragments that are in optical continuity with the fragments. Cement would probably be low Mg calcite. Common during meteoric carbonate diagenesis in the phreatic zone.