Article thumbnail

Discrete simulations of density-driven volcanic deformation: Applications to Martian caldera complexes

By Lindsay Laurel Zivney

Abstract

We have carried out 2-D numerical simulations using the discrete element method (DEM) to investigate density-driven deformation in Martian volcanic edifices and how it affects the development of caldera complexes. These simulations demonstrate that the presence of a dense and weak cumulate body within a volcanic edifice strongly influences the volcano morphology and enhances volcanic spreading. The settling of a cumulate body generates distinctive structural and morphological features characteristic of Olympus Mons and Arsia Mons, including low flank slopes and pronounced summit calderas. We show that gravitational spreading of a cumulate body can play a primary role in the long-term development of calderas. We conclude that a cumulate body that is both shallow and wide could generate a single large depression similar to the Arsia-type caldera, while our simulations of a narrow cumulate body are capable of generating summit subsidence that is similar in dimension to the Olympus Mons caldera

Topics: Geology, Geophysics
Year: 2010
OAI identifier: oai:scholarship.rice.edu:1911/62093
Download PDF:
Sorry, we are unable to provide the full text but you may find it at the following location(s):
  • http://hdl.handle.net/1911/620... (external link)

  • To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.

    Suggested articles