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Phosphatization at Malpelo Island, Colombia

1943; Geological Society of America; Volume: 54; Issue: 5 Linguagem: Inglês

10.1130/gsab-54-707

1943-2674

D. McConnell,

Archaeological and Geological Studies

Research Article| May 01, 1943 Phosphatization at Malpelo Island, Colombia DUNCAN McCONNELL DUNCAN McCONNELL Search for other works by this author on: GSW Google Scholar Author and Article Information DUNCAN McCONNELL Publisher: Geological Society of America Received: 06 Nov 1942 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 © 1943 Geological Society of America GSA Bulletin (1943) 54 (5): 707–716. https://doi.org/10.1130/GSAB-54-707 Article history Received: 06 Nov 1942 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation DUNCAN McCONNELL; Phosphatization at Malpelo Island, Colombia. GSA Bulletin 1943;; 54 (5): 707–716. doi: https://doi.org/10.1130/GSAB-54-707 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 A petrographic study is presented of three specimens from Malpelo, a volcanic island in the eastern equatorial Pacific Ocean. Two of the specimens show appreciable alteration by phosphatic solutions from guano: an amygdaloid in which the feldspars have been completely destroyed and replaced and a phosphate rock composed essentially of phosphosiderite and strengite, a dimorphous pair with the composition FePO4·2H2O. The third is a comparatively unaltered augite andesite having a rather low silica content and possibly containing anemousite. The petrologic relations among aluminum-iron and calcium phosphates are discussed briefly. 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.