Episodic uplift of the Transantarctic Mountains

Abstract

Research Article| February 01, 1992 Episodic uplift of the Transantarctic Mountains Edmund Stump; Edmund Stump 1Department of Geology, Arizona State University, Tempe, Arizona 85287 Search for other works by this author on: GSW Google Scholar Paul G. Fitzgerald Paul G. Fitzgerald 1Department of Geology, Arizona State University, Tempe, Arizona 85287 Search for other works by this author on: GSW Google Scholar Author and Article Information Edmund Stump 1Department of Geology, Arizona State University, Tempe, Arizona 85287 Paul G. Fitzgerald 1Department of Geology, Arizona State University, Tempe, Arizona 85287 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1992) 20 (2): 161–164. https://doi.org/10.1130/0091-7613(1992)020<0161:EUOTTM>2.3.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 Edmund Stump, Paul G. Fitzgerald; Episodic uplift of the Transantarctic Mountains. Geology 1992;; 20 (2): 161–164. doi: https://doi.org/10.1130/0091-7613(1992)020<0161:EUOTTM>2.3.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 An apatite fission-track age profile from the Scott Glacier region provides evidence of uplift and denudation of the Transantarctic Mountains in the Early and Late Cretaceous. Samples for fission-track analysis were collected over a vertical range of ∼2 km from the Mt. Griffith massif. Apatite ages from the upper 700 m of Mt. Griffith vary little with elevation, indicative of rapid cooling accompanying Early Cretaceous uplift and denudation. Ages from the northeast buttress of Mt. Griffith (the Fission Wall) define a steep gradient and are indicative of rapid cooling accompanying Late Cretaceous uplift and denudation. The two parts of the profile are separated by a fault. Subsequent uplift and denudation of the Mt. Griffith massif in the Cenozoic were required to elevate the massif (and the apatite age profile) to its present position. This younger uplift was most likely initiated in the early Cenozoic, penecontemporaneously with welldocumented early Cenozoic uplift in the Victoria Land region of the Transantarctic Mountains. These three periods of uplift coincide with periods of major plate reorganization in the southwest Pacific region: (1) initial rifting of Australia from Antarctica and impingement of the Pacific-Phoenix ridge with the subduction zone marginal to New Zealand in the Early Cretaceous, (2) separation of Australia, New Zealand, and Antarctica in the Late Cretaceous, and (3) cessation of spreading in the Tasman Sea ∼10 m.y. prior to accelerated spreading between Australia and Antarctica in the early Cenozoic. 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.