Specimens of quartz-muscovite-schist obtained fro: boulders in the Shotover river, western Otago, New Zealand, ere recently examined by the writer and found to contain abundant piedmontite, a mineral not previously recorded from New Zealand. The specimens had been collected twenty years before and were labelled ' micaceous quartz schist coloured with haematite' in the geological collections of the Otago University. The following description is submitted pending further field investigations.
Research Article| January 01, 1961 COUPLED REACTIONS IN METAMORPHISM: A CORRECTION W. S FYFE; W. S FYFE UNIVERSITY OF CALIFORNIA, BERKELEY, CALIF. Search for other works by this author on: GSW Google Scholar F. J TURNER; F. J TURNER UNIVERSITY OF CALIFORNIA, BERKELEY, CALIF. Search for other works by this author on: GSW Google Scholar J VERHOOGEN J VERHOOGEN UNIVERSITY OF CALIFORNIA, BERKELEY, CALIF. Search for other works by this author on: GSW Google Scholar GSA Bulletin (1961) 72 (1): 169–170. https://doi.org/10.1130/0016-7606(1961)72[169:CRIMAC]2.0.CO;2 Article history received: 21 Jun 1960 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation W. S FYFE, F. J TURNER, J VERHOOGEN; COUPLED REACTIONS IN METAMORPHISM: A CORRECTION. GSA Bulletin 1961;; 72 (1): 169–170. doi: https://doi.org/10.1130/0016-7606(1961)72[169:CRIMAC]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 SocietyGSA Bulletin Search Advanced Search Abstract No abstract available. 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.
This note examines critically recent attempts to identify or closely correlate lunar surface samples-on the basis of alpha-scattering analysis-with terrestrial igneous rocks (basalts) or with eucrite meteorites. Basalts show considerable variety; but all have chemical characteristics inherited from terrestrial mantle rock melted under a limited range of terrestrial pressure-temperature conditions. What is characteristic is not so much the content of any particular element or oxide-e.g., SiO(2) 47-52 per cent-but rather a complete chemical pattern in which such ratios as Fe/Mg and Ca/(Na + K) show consistent relationships to Si content. These are the chemical criteria that might be useful in comparing terrestrial basalt with extraterrestrial rocks. Basalts also have distinctive mineralogical and textural characteristics; and if a lunar or meteoritic rock is to be identified as basalt it must possess these, too.Turkevich's analysis of alpha-scattering data for lunar samples (Surveyor V) show significant departure from basaltic composition: Very high (Ca + K)/Na associated with distinctly high Fe/Mg. In basalts relatively high (Ca + K)/Na-in no case approaching the reported lunar values-tends to be associated with Fe/Mg values lower than average. The same "lunar" pattern of high (Ca + K)/Na and Fe/Mg appears in recorded analyses of eucrite meteorites. In the lunar samples, Ti is notably higher than in basalts, and even more so than in eucrites. If eucrites are of lunar origin their Ti values are, so far, a real anomaly.