Internal crater modification on Venus: Recognizing crater-centered volcanism by changes in floor morphometry and floor brightness

Details Internal crater modification on Venus: Recognizing crater-centered volcanism by changes in floor morphometry and floor brightness Internal crater modification on Venus: Recognizing crater-centered volcanism by changes in floor morphometry and floor brightness

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999jgr...10421957w&link_type=abstract

Journal of Geophysical Research, Volume 104, Issue E9, p. 21957-21978

Physics

6

Planetology: Solar System Objects: Venus

Scientific paper

Bright-floored and dark-floored craters on Venus show systematic differences in their size, distribution and apparent modification. Bright-floored craters exhibit the following characteristics: an interior radar brightness comparable to the youngest craters on Venus, a tendency toward smaller crater diameters, and a broad range of crater elevations. In contrast, the dark-floored craters are darker than pristine craters on Venus, are typically much larger, and preferentially occur at lower elevations. They also have larger floors than pristine craters of the same size and are similar in many respects to floor-fractured craters on Venus. Of the four proposed origins for dark crater floors, these observations are most consistent with crater-centered volcanism. Surface weathering or eolian deposition may contribute to floor darkening in some cases, but neither of these mechanisms, nor impact melts, can independently explain the full range of observed modifications. Based on the measurements of this study, volcanism has affected at least 6-13% of the impact craters on Venus. The estimated lava fill thicknesses are of the order of 100-500 m. Thus, if these flows are representative of eruptions elsewhere in the Venusian lowlands, the implied average flux of plains-forming volcanism on Venus for the last 300 m.y. is ~0.01-0.02 km3/yr.

Affiliated with

Also associated with

No associations

Rating

Internal crater modification on Venus: Recognizing crater-centered volcanism by changes in floor morphometry and floor brightness 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 Internal crater modification on Venus: Recognizing crater-centered volcanism by changes in floor morphometry and floor brightness, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Internal crater modification on Venus: Recognizing crater-centered volcanism by changes in floor morphometry and floor brightness will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-987056