A fault surface exposed on Mercury

被引：1

作者：

Pegg, D. L. ^{[1
]}

Rothery, D. A. ^{[1
]}

Conway, S. J. ^{[2
]}

Balme, M. R. ^{[1
]}

机构：

[1] Open Univ, Milton Keynes MK7 6AA, Bucks, England

[2] Univ Nantes, UMR Lab Planetol & Geodynam 6112, CNRS, Nantes, France

来源：

PLANETARY AND SPACE SCIENCE | 2021年 / 201卷

基金：

英国科学技术设施理事会;

关键词：

Mercury; Tectonics; Fault; Lobate scarp; Vent; EXPLOSIVE VOLCANISM; GLOBAL CONTRACTION; LOBATE SCARPS; MESSENGER; TECTONICS; EVOLUTION; MORPHOLOGY; LANDFORMS; CRATERS; HISTORY;

D O I：

10.1016/j.pss.2021.105223

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Mercury's tectonic history has been dominated by global contraction as the planet shrinks and cools. Previously, fault dips have been indirectly estimated by measuring offsets to the rims of craters displaced by fault movement. Here we present the first observations of a fault surface exposed in three dimensions, in this case within a volcanic vent. We use shadow measurements to determine the depth of the vent and have measured the dip of the fault as 28 degrees +5. This is towards the shallower end of previous dip estimates used to estimate global contraction. If it is representative, it suggests global contraction at the higher end (5.7-7.1 km) of previously published estimates.

引用

页数：7

共 50 条

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