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Geologic analysis of the interior region of Artemis (Venus, 34°S 132°E)

Geologic analysis of the interior region of Artemis (Venus, 34°S 132°E). Roger A. Bannister University of Minnesota Duluth. D. C. A. B. Hypotheses for Artemis’ formation. Subduction. Plume. Simple diapir interaction. NW directed convergence Strike slip in NE and SW

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Geologic analysis of the interior region of Artemis (Venus, 34°S 132°E)

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  1. Geologic analysis of the interior region of Artemis (Venus, 34°S 132°E) Roger A. Bannister University of Minnesota Duluth

  2. D C A B

  3. Hypotheses for Artemis’ formation Subduction Plume Simple diapir interaction NW directed convergence Strike slip in NE and SW Chasma due to flexure Interior forms with chasma Overlapping spatial and temporal evolution Small scale convection or secondary diapirs Key references: Stofan et al (1992), Griffiths and Campbell (1992), Hansen (2002) Key references: Brown and Grimm (1995, 1996),Schubert and Sandwell (1995), McKenzie et al. (1992) Bolide Impact Metamorphic Core Complex Ridge around basin Obliteration of older structures Quick formation 170 km of extension Deep crust (maybe mantle) exposed in center Key references: Hamilton (2004) Key references: Spencer (2001)

  4. Metamorphic Core Complex Hypothesis

  5. Bolide Impact Hypothesis Cartoon bolide impact profile

  6. Subduction Hypothesis C C’

  7. PlumeHypothesis

  8. Results Subduction Hypothesis Plume Hypothesis ? Bolide Impact Hypothesis M.C.C. Hypothesis

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