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Cleopatra Patera on Venus: Venera 15/16 evidence for a volcanic origin
Ist Teil von
Geophysical research letters, 1987-01, Vol.14 (1), p.41-44
Ort / Verlag
Legacy CDMS: Blackwell Publishing Ltd
Erscheinungsjahr
1987
Link zum Volltext
Quelle
Wiley Online Library
Beschreibungen/Notizen
The nonconcentric nature, anomalous depth, and terraced morphology of the nested craters that compose Cleopatra Patera are more closely analogous to volcanic craters (calderas) than multiring impact structures. Associated deposits northeast and downslope of the Patera first recognized on Venera 15/16 radar images are interpreted as volcanic plains related to, and perhaps cogenetic with, Cleopatra. The plains lavas probably originated as effusions from a radial rift zone or ring fissures. Rim deposits surrounding Cleopatra are asymmetric along the structural fabric of the region, also indicating fissure-type eruptions. Finally, a volcanic origin not only is easily reconciled with the tectonic setting of the Patera, it is almost required by the correlation between the Patera and regional structural trend.