University of Oulu

Korteniemi, J., & Kukkonen, S. (2018). Volcanic structures within Niger and Dao Valles, Mars, and implications for outflow channel evolution and Hellas Basin rim development. Geophysical Research Letters, 45, 2934–2944. https://doi.org/10.1002/2018GL077067

Volcanic structures within Niger and Dao Valles, Mars, and implications for outflow channel evolution and Hellas Basin rim development

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Author: Korteniemi, J.1; Kukkonen, S.1,2
Organizations: 1Arctic Planetary Science Institute, Turku, Finland
2Astronomy Research Unit, University of Oulu, Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 5.6 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe201902226008
Language: English
Published: American Geophysical Union, 2018
Publish Date: 2019-02-22
Description:

Abstract

Outflow channel formation on the eastern Hellas rim region is traditionally thought to have been triggered by activity phases of the nearby volcanoes Hadriacus and Tyrrhenus Montes: As a result of volcanic heating subsurface volatiles were mobilized. It is, however, under debate, whether eastern Hellas volcanism was in fact more extensive, and if there were volcanic centers separate from the identified central volcanoes. This work describes previously unrecognized structures in the Niger‐Dao Valles outflow channel complex. We interpret them as volcanic edifices: cones, a shield, and a caldera. The structures provide evidence of an additional volcanic center within the valles and indicate volcanic activity both prior to and following the formation of the outflow events. They expand the extent, type, and duration of volcanic activity in the Circum‐Hellas Volcanic Province and provide new information on interaction between volcanism and fluvial activity.

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Series: Geophysical research letters
ISSN: 0094-8276
ISSN-E: 1944-8007
ISSN-L: 0094-8276
Volume: 45
Issue: 7
Pages: 2934 - 2944
DOI: 10.1002/2018GL077067
OADOI: https://oadoi.org/10.1002/2018GL077067
Type of Publication: A1 Journal article – refereed
Field of Science: 115 Astronomy and space science
Subjects:
Funding: The Jenny and Antti Wihuri Foundation, the Väisälä Foundation, and the Academy of Finland are recognized for funding this research (S.K.).
Copyright information: © 2018. American Geophysical Union. All Rights Reserved.