Chemical differentiation, thermal evolution, and catastrophic overturn on Venus: Predictions and geologic observations

Details Chemical differentiation, thermal evolution, and catastrophic overturn on Venus: Predictions and geologic observations Chemical differentiation, thermal evolution, and catastrophic overturn on Venus: Predictions and geologic observations

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993lpi....24..631h&link_type=abstract

In Lunar and Planetary Inst., Twenty-Fourth Lunar and Planetary Science Conference. Part 2: G-M p 631-632 (SEE N94-16173 03-91)

Mathematics

Logic

1

Geochemistry, Planetary Craters, Planetary Crusts, Planetary Evolution, Planetary Geology, Plates (Tectonics), Subduction (Geology), Venus (Planet), Venus Surface, Volcanoes, Deposits, Lithosphere

Scientific paper

Observations from Magellan show that: (1) the surface of Venus is generally geologically young, (2) there is no evidence for widespread recent crustal spreading or subduction, (3) the crater population permits the hypothesis that the surface is in production, and (4) relatively few impact craters appear to be embayed by volcanic deposits suggesting that the volcanic flux has drastically decreased as a function of time. These observations have led to consideration of hypotheses suggesting that the geological history of Venus may have changed dramatically as a function of time due to general thermal evolution, and/or thermal and chemical evolution of a depleted mantle layer, perhaps punctuated by catastrophic overturn of upper layers or episodic plate tectonics. We have previously examined the geological implications of some of these models, and here we review the predictions associated with two periods of Venus history. Stationary thick lithosphere and depleted mantle layer, and development of regional to global development of regional to global instabilities, and compare these predictions to the geological characteristics of Venus revealed by Magellan.

Affiliated with

Also associated with

No associations

Rating

Chemical differentiation, thermal evolution, and catastrophic overturn on Venus: Predictions and geologic observations does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Chemical differentiation, thermal evolution, and catastrophic overturn on Venus: Predictions and geologic observations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chemical differentiation, thermal evolution, and catastrophic overturn on Venus: Predictions and geologic observations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1448854