NDLI: Hot-spot tectonics of eistla regio, venus: results from magellan images and pioneer venus gravity

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Hot-spot tectonics of eistla regio, venus: results from magellan images and pioneer venus gravity

Content Provider	NASA Technical Reports Server (NTRS)
Author	Grimm, Robert E. Phillips, Roger J.
Copyright Year	1991
Description	Eistla Regio (ER) is a broad, low, discontinuous topographic rise striking roughly EW at low northern latitudes of Venus. Some 2000 x 7000 km in dimensions, 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 including transient plume behavior. Since ER is the first such rise viewed by Magellan and the latitude is very favorable for Pioneer Venus gravity studies, some of the predictions of a time dependent hot spot model are tested. Western ER is defined as the rise including Gula and Sif Mons and central ER as that including Sappho Patera. Superior conjunction prevented Magellan from returning data on eastern ER (Pavlova) during the first mapping cycle. It is concluded that the western and central portions of ER, while part of the same broad topographic rise and tectonic framework, have distinctly different surface ages and gravity signatures. The western rise, including Gula and Sif Mons, is the expression of deep seated uplift with volcanism limited to the individual large shields. The eastern portion has been widely resurfaced more recently by thermal anomalies in the mantle.
File Size	171488
Page Count	2
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19920001525
Archival Resource Key	ark:/13960/t4hn04s21
Language	English
Publisher Date	1991-06-01
Access Restriction	Open
Subject Keyword	Lunar And Planetary Exploration Venus Planet Calderas Planetary Geology Planetary Evolution Topography Venus Surface Volcanology Pioneer Venus Spacecraft Volcanoes Planetary Gravitation Tectonics Plumes Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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