A review of lava flow processes related to the formation of lunar sinuous rilles

Details A review of lava flow processes related to the formation of lunar sinuous rilles A review of lava flow processes related to the formation of lunar sinuous rilles

Oct 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982vep.....5..245h&link_type=abstract

(Symposium on Volcanoes of the Earth and Planets, University of Lancaster, Lancaster, England, Mar. 17, 1981.) Geophysical Surve

Physics

Lava, Lunar Geology, Lunar Surface, Rheology, Valleys, Channels, Erosion, Mathematical Models, Meanders, Melting, Turbulent Flow, Volcanoes

Scientific paper

A model is developed which explains the formation of lunar sinuous rilles by the action of lunar lava flows. This analytical lava flow model relates the shapes of lava flows to conditions at the commencement of the flows, and the yield strength of lava is utilized as a primary parameter. It is shown that this model correctly predicts the occurrence of the channel/levee morphology of lava flows. It is argued that the channels of large flows were deepened by melting and that a prolonged period of flow is required before melting of the substrate begins. The heat transfer processes within lava flows are examined, and estimates are given of initial heating periods and subsequent melting rates. In addition, the possibility of turbulent lava flow is considered. The application of the flow model to the sinuous rilles and flows in Mare Imbrium shows that both types of features could be the remnants of similar effusive events in which the flow could have become turbulent. Turbulent flow is found to promote erosive melting, and it is proposed that the sinuous rilles were cut by the flows which became turbulent. It is concluded that rilles were formed by the rapid effusion of large volumes of low yield strength lavas.

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