کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8135014 | 1523513 | 2016 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Geomorphology and volcanology of Maat Mons, Venus
ترجمه فارسی عنوان
ژئومورفولوژی و آتشفشان شناسی مات مونس، ونوس
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کلمات کلیدی
سطح ونوس، آتشفشان، فرآیندهای زمین شناسی،
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علوم فضا و نجوم
چکیده انگلیسی
Full-resolution (FMIDR) Magellan radar backscatter images have been used to characterize the geology and volcanology of the volcano Maat Mons on Venus. This volcano has often been identified by remote sensing techniques as one of the volcanoes on the planet that could have been recently active, and is the highest volcano on Venus with a relief of â¼9Â km. The summit of Maat Mons is characterized by a caldera complex â¼26Â ÃÂ 30Â km in diameter with at least six remnant pit craters â¼10Â km in diameter preserved in the walls of the caldera, suggesting that multiple small volume (<16Â km3) collapse events formed the caldera. Four lava flow types, described as “digitate flows”, “sheet flows”, “fan flows” and “filamentary flows”, can be identified on the flanks. Three rift zones can be identified from the distribution of 217 pit craters >1Â km in diameter on the flanks. These pits appear to have formed by collapse with no effusive activity associated with their formation. No evidence for explosive volcanism can be identified, despite the (relatively) low atmospheric pressure (â¼55Â bar) near the summit. There is also a lack of evidence for lava channels, deformation features within the caldera, and thrust faults on the flanks, indicating that the physical volcanology of Maat Mons is simpler than that of typical martian and terrestrial shield volcanoes. Preservation of fine-scale (3-4 pixels) structures within the pit craters and summit pits is consistent with geologically very recent activity, but no evidence for current activity can be identified.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Icarus - Volume 277, October 2016, Pages 433-441
Journal: Icarus - Volume 277, October 2016, Pages 433-441
نویسندگان
Peter J. Mouginis-Mark,