Helium Age Measurement. I. Preliminary Magnetite Index

Abstract

Research Article| March 01, 1943 Helium Age Measurement. I. Preliminary Magnetite Index PATRICK M. HURLEY; PATRICK M. HURLEY Search for other works by this author on: GSW Google Scholar CLARK. GOODMAN CLARK. GOODMAN Search for other works by this author on: GSW Google Scholar GSA Bulletin (1943) 54 (3): 305–324. https://doi.org/10.1130/GSAB-54-305 Article history received: 24 Apr 1942 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation PATRICK M. HURLEY, CLARK. GOODMAN; Helium Age Measurement. I. Preliminary Magnetite Index. GSA Bulletin 1943;; 54 (3): 305–324. doi: https://doi.org/10.1130/GSAB-54-305 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 SocietyGSA Bulletin Search Advanced Search Abstract Helium age measurements on magnetite specimens of various geological ages show a grouping and sequence in accordance with geological knowledge and a spacing compatible with ideas derived from sedimentational history. Ages in millions of years are given as follows: mean Miocene, 19; mean Laramide, 57; mean Nevadan, 118; mean late Triassic, 155; mean late Appalachian, 215; mean Devonian, 348; pre-Cambrian ranging from 500 to 1650. As a result the scale is considered suitable as an index for preliminary investigation of the helium retentivity of minerals and application of the method to igneous rocks. 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.