DOI: 10.1029/2018JE005566
Scopus记录号: 2-s2.0-85050494302
论文题名: Mapping of Geologic Structures in the Niobe-Aphrodite Map Area of Venus: Unraveling the History of Tectonic Regime Change
作者: Hansen V.L. ; López I.
刊名: Journal of Geophysical Research: Planets
ISSN: 21699097
出版年: 2018
卷: 123, 期: 7 起始页码: 1760
结束页码: 1790
语种: 英语
英文关键词: Artemis
; crustal plateaus
; geologic mapping
; lithodemic
; tectonic structures
; Venus
Scopus关键词: Aphrodita
英文摘要: Recent construction of 1:10 M IMaps of Niobe Planitia and Aphrodite Terra paints a rich picture of Venus evolution. Using the Niobe-Aphrodite map area (>25% of Venus) as an example, we illustrate the methodology and importance of detailed structural mapping at large regional scales in order to identify tectonic domains that lead to the discovery of global-scale geodynamic evolution and operative processes. We highlight differences between lithodemic and lithostratigraphic units in geologic mapping. We step through a series of structural element maps that reveal the character of at least three different tectonic domains and evolving tectonic regimes that reflect changing geodynamic processes, here divided into three eras. The ancient era encompasses formation of tessera terrain and represents a time of unique global and environmental conditions marked by globally thin lithosphere. The second era resulted in formation of the Artemis superstructure. The ~13,000-km-diameter footprint of the Artemis superstructure is huge but not global, although associated mantle flow patterns could have had a global reach. As formation of the Artemis superstructure waned, tectonic activity became more focused leading to formation of the fracture zone complex. This complex extends beyond the map area connecting with Atla, Beta, and Themis regiones and associated fracture zones, marking the youngest era. Structural mapping of the Niobe-Aphrodite map area indicates that Venus exhibits a complex, multistage history like other terrestrial planets, which probably extends to several billion years. Given that Venus never developed plate tectonics, Venus' preserved surface record is likely significantly richer than that of Earth. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113541
Appears in Collections: 气候减缓与适应
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作者单位: Department of Earth and Environmental Sciences, University of Minnesota Duluth, Duluth, MN, United States; Department of Biology and Geology, Physics and Inorganic Chemistry, Universidad Rey Juan Carlos, Madrid, Spain
Recommended Citation:
Hansen V.L.,López I.. Mapping of Geologic Structures in the Niobe-Aphrodite Map Area of Venus: Unraveling the History of Tectonic Regime Change[J]. Journal of Geophysical Research: Planets,2018-01-01,123(7)