BASIN ANALYSIS

Virginia T. McLemoreNew Mexico Bureau of Geology and Mineral

ResourcesNew Mexico Institute of Mining and

Technology, Socorro, NM

Class notes

• Choose an article, read it, and report the important points back to the class– 10 min (NO LONGER)– Purpose of paper– Methods used– Conclusion of paper– Your evaluation

• Class schedule (April 3, 8, 17, 24, 29, May 8)• Field trip date

What is basin analysis?

What is basin analysis?

• Geologic method• Defining and

describing a sedimentary basin

• Analyze the sediment– Composition– Primary structures– Internal architecture

• Describe basin components– Backarc– Forearc– passive margin– Epicontinental– Extensional

Controls of basins

• Sediment supply (uplift of source area)

• Subsidence (thrusting, flexing of the lithosphere)—regional tectonic activity

• Sea level (climate)

• The rates of these processes is more important then their magnitude.

Types of Basins

Rift basins

http://web.mala.bc.ca/earle/geol201/basin-types.htm

Passive margin basins

http://web.mala.bc.ca/earle/geol201/basin-types.htm

Subduction-related basins

http://web.mala.bc.ca/earle/geol201/basin-types.htm

Subduction-related basins

http://web.mala.bc.ca/earle/geol201/basin-types.htm

Subduction-related basins

http://web.mala.bc.ca/earle/geol201/basin-types.htm

Subduction-related basins

http://web.mala.bc.ca/earle/geol201/basin-types.htm

Intracontinental basin

Intracontinental basin

Syn-orogenic and post-orogenic

DEPOSITIONAL ENVIRONMENTS

http://www.eos.ubc.ca/resources/slidesets/clastic/clastic.html

Depositional environments of sandstones

http://www.eos.ubc.ca/resources/slidesets/clastic/c.html

Depositional environments of sandstones

http://www.eos.ubc.ca/resources/slidesets/clastic/c.html

Depositional environments of sandstones

http://www.eos.ubc.ca/resources/slidesets/clastic/c.html

Depositional environments of sandstones

http://www.eos.ubc.ca/resources/slidesets/clastic/c.html

Overbank deposits

http://www.eos.ubc.ca/resources/slidesets/clastic/c.html

Sandstone deposits

http://www.eos.ubc.ca/resources/slidesets/clastic/c.html

Sandstone deposits

http://www.eos.ubc.ca/resources/slidesets/clastic/c.html

Sandstone deposits

http://www.eos.ubc.ca/resources/slidesets/clastic/c.html

Sandstone deposits

http://www.eos.ubc.ca/resources/slidesets/clastic/c.html

Depositional environments of sandstones

http://www.eos.ubc.ca/resources/slidesets/clastic/c.html

Depositional environments of sandstones

http://www.eos.ubc.ca/resources/slidesets/clastic/c.html

Depositional environments of sandstones

http://www.eos.ubc.ca/resources/slidesets/clastic/c.html

Depositional environments of sandstones

http://www.eos.ubc.ca/resources/slidesets/clastic/c.html

Depositional environments of sandstones

http://www.eos.ubc.ca/resources/slidesets/clastic/c.html

Depositional environments of sandstones

http://www.eos.ubc.ca/resources/slidesets/clastic/c.html

Depositional environments of sandstones

http://www.eos.ubc.ca/resources/slidesets/clastic/c.html

Depositional environments of sandstones

http://www.eos.ubc.ca/resources/slidesets/clastic/c.html

Depositional environments of sandstones

http://www.eos.ubc.ca/resources/slidesets/clastic/c.html

Depositional environments of sandstones

http://www.eos.ubc.ca/resources/slidesets/clastic/c.html

Depositional environments of sandstones

http://www.eos.ubc.ca/resources/slidesets/clastic/c.html

Depositional environments of sandstones

http://www.eos.ubc.ca/resources/slidesets/clastic/c.html

Depositional environments of sandstones

http://www.eos.ubc.ca/resources/slidesets/clastic/c.html

Depositional environments of sandstones

http://www.eos.ubc.ca/resources/slidesets/clastic/c.html

Depositional environments of sandstones

http://www.eos.ubc.ca/resources/slidesets/clastic/c.html

Depositional environments of sandstones

http://www.eos.ubc.ca/resources/slidesets/clastic/c.html

Depositional environments of sandstones

http://www.eos.ubc.ca/resources/slidesets/clastic/c.html

Depositional environments of shales

http://www.eos.ubc.ca/resources/slidesets/clastic/c.html

Depositional environments of shales

http://www.eos.ubc.ca/resources/slidesets/clastic/c.html

Depositional environments of shales

http://www.eos.ubc.ca/resources/slidesets/clastic/c.html

Depositional environments of shales

http://www.eos.ubc.ca/resources/slidesets/clastic/c.html

Depositional environments of shales

http://www.eos.ubc.ca/resources/slidesets/clastic/c.html

Depositional environments of shales

http://www.eos.ubc.ca/resources/slidesets/clastic/c.html