Global correlation of volcanic centers on Venus with uplands and with extension: Influence of mantle convection and altitude

Details Global correlation of volcanic centers on Venus with uplands and with extension: Influence of mantle convection and altitude Global correlation of volcanic centers on Venus with uplands and with extension: Influence of mantle convection and altitude

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992lpico.789...25c&link_type=abstract

In Lunar and Planetary Inst., Papers Presented to the International Colloquium on Venus p 25-27 (SEE N93-14288 04-91)

Mathematics

Logic

1

Convective Heat Transfer, Planetary Geology, Tectonics, Venus (Planet), Volcanoes, Volcanology, Altitude, Correlation

Scientific paper

The observed distribution of volcanism on Venus and its associations with geologic and tectonic characteristics are examined for significant global-scale tectonic, mantle, and volcanic influences. We find that volcanic centers are correlated geologically with zones of extension, infrequent in lowland regions, and infrequent in regions with evidence for tectonic shortening. In addition, volcanic centers are significantly concentrated in a broad region at least 10,000 km in diameter between Beta, Alta, and Themis Regiones. This area is nearly hemispheric in scale and coincides spatially with the area of greatest concentration of extensional characteristics. Our analysis suggests that the observed distribution patterns of volcanic centers reflect the regional patterns of extension, the origin of the extension and volcanism are closely related, and the hemispheric scale of both patterns implies a deep-seated origin such as large-scale interior mantle dynamic patterns. However, altitude-dependent effects on both the formation and preservation of volcanic centers could also strongly influence the observed distribution pattern.

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