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Book Chapter

Rupes Recta and the geological history of the Mare Nubium region of the Moon: insights from forward mechanical modelling of the ‘Straight Wall’

By
Amanda L. Nahm
Amanda L. Nahm
Department of Geological Sciences, University of Texas at El Paso, 500 West University Avenue, El Paso, TX 79968, USACenter for Lunar Science and Exploration, USRA – Lunar and Planetary Institute, 3600 Bay Area Boulevard, Houston, TX 77058, USANASA Lunar Science InstituteDepartment of Geological Sciences, University of Idaho, 875 Perimeter Drive, MS 3022, Moscow, ID 83844-3022, USA
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Richard A. Schultz
Richard A. Schultz
ConocoPhillips, 600 North Dairy Ashford, PR-2010, Houston, TX 77079, USA
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Published:
January 01, 2015

Abstract

Rupes Recta, also known as the ‘Straight Wall’, is an individual normal fault located in eastern Mare Nubium on the nearside of the Moon. Age and cross-cutting relationships suggest that the maximum age of Rupes Recta is 3.2 Ga, which may make it the youngest large-scale normal fault on the Moon. Based on detailed structural mapping and throw distribution analysis, fault nucleation is interpreted to have occurred near the fault centre, and the fault has propagated bi-directionally, growing northwards and southwards by segment linkage. Forward mechanical modelling of fault topography gives a best-fitting fault dip of approximately 85°, and suggests that Rupes Recta accommodated approximately 400 m of maximum displacement and extends to a depth of around 42 km. The cumulative driving stresses required to form Rupes Recta are similar in magnitude to those that formed normal faults in Tempe Terra, Mars. The spatial and temporal association with Rima Birt, a sinuous rille to the west of Rupes Recta, suggests a genetic relationship between both structures and implies regional extension at the time of formation.

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Geological Society, London, Special Publications

Volcanism and Tectonism Across the Inner Solar System

T. Platz
T. Platz
Planetary Science Institute, USA
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M. Massironi
M. Massironi
Università degli Studi di Padova, Italy
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P. K. Byrne
P. K. Byrne
Lunar and Planetary Institute, USA
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H. Hiesinger
H. Hiesinger
Westfälische Wilhelms-Universitä Münster, Germany
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Geological Society of London
Volume
401
ISBN electronic:
9781862396777
Publication date:
January 01, 2015

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