Heat flow and late-stage volcanism at Aramaiti Corona, Venus
department or school: Science, Faculty of
department or school: Earth, Ocean and Atmospheric Sciences, Department of
data provider: DSpace
degree campus: UBCV
creator: Russell, Megan B.
issued: 2020-03-23T19:54:16Z
issued: 2020
related degree: Master of Science - MSc
degree grantor: University of British Columbia
description: In this thesis, an investigation of volcanism associated with Aramaiti Corona, Venus, is presented. Two features were identified in images and altimetry data collected during the NASA Magellan mission, which orbited Venus 1990–1994, and are studied here using higher resolution topography later derived from stereo SAR images. The first is Narina Tholi, a steep-sided volcanic dome located on the western fracture annulus of Aramaiti Corona. Around this dome is a topographic moat characteristic of a lithospheric flexural signature. By modelling lithospheric flexure on terrestrial planets and icy moons, subsurface heat flow, which is an important metric in investigating a thermal history, can be estimated. The topographic signature is compared with models for the flexure of a thin elastic shell to estimate the lithospheric thickness and the associated heat flow. The results for Narina Tholi indicate a thinner lithospheric thickness and correspondingly higher heat flow than previously estimated regionally from flexure around Aramaiti Corona. This implies a locally higher heat flow, consistent with the emplacement of Narina Tholi late in the corona’s evolution. The second feature is associated with the north portion of Aramaiti Corona and is inferred to be the result of volcanism associated with the corona fracture annulus. This suggests a different style of volcanism at Aramaiti Corona than has been previously observed, one that is possibly late-stage.
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/73791
note: Heat Flow and Late-Stage Volcanism at Aramaiti Corona, Venus by Megan B. Russell B.Sc. (Hons), York University, 2009 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE in THE FACULTY OF GRADUATE AND POSTDOCTORAL STUDIES (Geophysics) THE UNIVERSITY OF BRITISH COLUMBIA (Vancouver) March 2020 © Megan B. Russell, 2020 ii The following individuals certify that they have read, and recommend to the Faculty of Graduate and Postdoctoral Studies for acceptance, a thesis/dissertation entitled: Heat Flow and Late-Stage Volcanism at Aramaiti Corona, Venus, submitted by Megan B. Russell in partial fulfillment of the requirements for the degree of Master of Science in Geophysics. Examining Committee: Catherine L. Johnson, Professor, Department of Earth, Ocean and Atmospheric Sciences, UBC Supervisor A. Mark Jellinek, Professor, Department of Earth, Ocean and Atmospheric Sciences Supervisory Committee Member Lori Kennedy, Associate Professor, Department of Earth, Ocean and Atmospheric Sciences UBCUBC Additional Examiner Additional Supervisory Committee Members: Valentina Radić, Associate Professor, Department of Earth, Ocean and Atmospheric Sciences Supervisory Committee Member iii Abstract In this thesis, an investigation of volcanism associated with Aramaiti Corona on Venus is presented. Two features were identified in images and altimetry data collected during the NASA Magellan mission, which orbited Venus 1990–1994, and are studied here using higher resolution topography later derived from stereo SAR images. The first is Narina Tholi, a steep-sided volcanic dome located on the western fracture annulus of Aramaiti Corona. Around this dome is a topographic moat characteristic of a lithospheric flexural signature. By modelling lithospheric flexure on terrestrial planets and icy moons, subsurface heat flow, which is an important metric in investigating a thermal history, can be estimated. The topographic signature is compared with mode…
has type: Thesis/Dissertation
date issued: 2020-05
is shown at: 10.14288/1.0389618
language: eng
degree discipline: Geophysics
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution-NonCommercial-NoDerivatives 4.0 International
rights URI: http://creativecommons.org/licenses/by-nc-nd/4.0/
scholar level: Graduate
type: Text
identifier URI: http://hdl.handle.net/2429/73791