Subcrustal earthquakes in the central South Island, New Zealand, and the root of the Southern Alps

Abstract

Research Article| December 01, 1987 Subcrustal earthquakes in the central South Island, New Zealand, and the root of the Southern Alps Martin Reyners Martin Reyners 1Geophysics Division, Department of Scientific and Industrial Research, P.O. Box 1320, Wellington, New Zealand Search for other works by this author on: GSW Google Scholar Author and Article Information Martin Reyners 1Geophysics Division, Department of Scientific and Industrial Research, P.O. Box 1320, Wellington, New Zealand Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1987) 15 (12): 1168–1171. https://doi.org/10.1130/0091-7613(1987)15<1168:SEITCS>2.0.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Martin Reyners; Subcrustal earthquakes in the central South Island, New Zealand, and the root of the Southern Alps. Geology 1987;; 15 (12): 1168–1171. doi: https://doi.org/10.1130/0091-7613(1987)15<1168:SEITCS>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract The Pukaki microearthquake network has revealed significant earthquake activity deeper than 15 km in the central South Island, New Zealand, extending to a depth of 73 km beneath the crest of the Southern Alps. Events deeper than 25 km define a planar seismic zone that has a strike of 41° and dips northwest at 19°. Gravity models suggest that earthquakes in this zone are occurring in a seismogenic uppermost mantle underlying an aseismic lower crustal root to the Southern Alps. The 17° difference in strike of the dipping seismic zone and the Alpine fault provides an explanation for the pattern of uplift and crustal thickening seen in the central South Island. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.