N 92 - 10743 Hot - Spot Tectonics of Eistla Regio , Venus : Results From
نویسندگان
چکیده
Introduction. Eistla Regio is a broad, low, discontinuous topographic rise striking roughly EW at low northern latitudes of Venus. Some 2000x7000 km in dimension, it is the third largest rise in planform on Venus after Aphrodite Terra and Beta-Phoebe Regiones. These rises are the key physiographic elements in a hot-spot model of global tectonics [1] including transient plume behavior [2]. Since Eistla Regio is the first such dse viewed by Magellan and the latitude is very favorable for Pioneer Venus gravity studies, we attempt to test some of the predictions of a timedependent hot-spot model here. We define western Eisfla Regio as the rise including Gula and sir Mona and central Eisfla Regio as that including Sappho Patera. Superior conjunction prevented Magellan from returning data on eastern Eisfla Regio (Pavlova) during the first mapping cycle.
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