Leucogranites in the Black Hills of South Dakota: The consequence of shear heating during continental collision

Abstract

Research Article| June 01, 1999 Leucogranites in the Black Hills of South Dakota: The consequence of shear heating during continental collision Peter I. Nabelek; Peter I. Nabelek 1Department of Geological Sciences, University of Missouri, Columbia, Missouri 65211, USA Search for other works by this author on: GSW Google Scholar Mian Liu Mian Liu 1Department of Geological Sciences, University of Missouri, Columbia, Missouri 65211, USA Search for other works by this author on: GSW Google Scholar Geology (1999) 27 (6): 523–526. https://doi.org/10.1130/0091-7613(1999)027<0523:LITBHO>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 Peter I. Nabelek, Mian Liu; Leucogranites in the Black Hills of South Dakota: The consequence of shear heating during continental collision. Geology 1999;; 27 (6): 523–526. doi: https://doi.org/10.1130/0091-7613(1999)027<0523:LITBHO>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 Leucogranites are common features of convergent orogens. However, the heat necessary for producing leucogranite magma from pelitic sources in convergent orogens is a major unresolved issue. We suggest that the generation of the Harney Peak Granite, Black Hills, South Dakota, during the Proterozoic Trans-Hudson orogeny is best explained by shear heating during thrusting of a Proterozoic sedimentary sequence over the Archean Wyoming basement. Our thermotectonic model successfully reproduces pressure-temperature-time constraints on early regional metamorphism of schists and subsequent generation of the late orogenic Harney Peak Granite. The model is consistent with isotopic data for the granite, which require both Proterozoic and Archean source rocks, and its emplacement as small batches of melt. The similarity of geologic relationships in the Black Hills to those of other collisional orogens suggests that shear heating may be a viable mechanism for leucogranite generation in thickened crusts. 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.