| Abstract: | The Magellan spacecraft orbited Venus from August 10, 1990, until it plunged into the Venusian atmosphere on October 12, 1994. Magellan Mission objectives included (1) improving the knowledge of the geological processes, surface properties, and geologic history of Venus by analysis of surface radar characteristics, topography, and morphology and (2) improving the knowledge of the geophysics of Venus by analysis of Venusian gravity.
The Helen Planitia quadrangle (V-52), located in the southern hemisphere of Venus between lat 25 deg S. and 50 deg S. and between long 240 deg E. and 270 deg E., covers approximately 8,000,000 km2. Regionally, the map area is located at the southern limit of an area of enhanced tectonomagmatic activity and extensional deformation, marked by a triangle that has highland apexes at Beta, Atla, and Themis Regiones (BAT anomaly) and is connected by the large extensional belts of Devana, Hecate, and Parga Chasmata. The BAT anomaly covers approximately 20 percent of the Venusian surface. |
| Genre: | USGS Numbered Series |
| ProdID: | 97214 |
| Citation Author: | Lopez, Ivan; Hansen, Vicki L. |
| Citation Contributing Office: | Astrogeology Research Program |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | Version 1.0 |
| Citation Editor: | |
| Citation End Page: | |
| Citation Issue: | |
| Citation Keywords: | |
| Citation Language: | ENGLISH |
| Citation Larger Work Title: | |
| Citation LatN: | -0250000 |
| Citation LatS: | -0500000 |
| Citation LonE: | 2700000 |
| Citation LonW: | 2400000 |
| Citation Month: | |
| Citation No Pagination: | N |
| Citation Number Of Pages: | |
| Citation Online Only Flag: | N |
| Citation Phsyical Description: | Report: ii, 22 p.; Plate: 56 x 35.5 inches |
| Citation Projection: | Lambert |
| Citation Public Comments: | Prepared for the National Aeronautics and Space Administration |
| Citation Publisher: | U.S. Geological Survey |
| Citation Series: | Scientific Investigations Map |
| Citation Series Code: | SIM |
| Citation Series Number: | 3026 |
| Citation Search Results Text: | Geologic Map of the Helen Planitia Quadrangle (V-52), Venus; 2008; SIM; 3026; Lopez, Ivan; Hansen, Vicki L. |
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| Citation Volume: | |
| Citation Year: | 2008 |
| Type: | citation/reference |
| Text: | Geologic Map of the Helen Planitia Quadrangle (V-52), Venus; 2008; SIM; 3026; Lopez, Ivan; Hansen, Vicki L. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/usgs_thumb.jpg |
| URL (INDEX PAGE): | http://pubs.usgs.gov/sim/3026/ |
| Date Other: | Tue, 13 Jan 2009 00:00 -0600 |
| Publisher: | U.S. Geological Survey |
