HYDROTHERMAL ALTERATION AT SANTA RITA, NEW MEXICO

Abstract

Research Article| April 01, 1950 HYDROTHERMAL ALTERATION AT SANTA RITA, NEW MEXICO PAUL F KERR; PAUL F KERR COLUMBIA UNIVERSITY, NEW YORK, N. Y. Search for other works by this author on: GSW Google Scholar J. L KULP; J. L KULP COLUMBIA UNIVERSITY, NEW YORK, N. Y. Search for other works by this author on: GSW Google Scholar C MEADE PATTERSON; C MEADE PATTERSON COLUMBIA UNIVERSITY, NEW YORK, N. Y. Search for other works by this author on: GSW Google Scholar ROBERT J WRIGHT ROBERT J WRIGHT COLUMBIA UNIVERSITY, NEW YORK, N. Y. Search for other works by this author on: GSW Google Scholar Author and Article Information PAUL F KERR COLUMBIA UNIVERSITY, NEW YORK, N. Y. J. L KULP COLUMBIA UNIVERSITY, NEW YORK, N. Y. C MEADE PATTERSON COLUMBIA UNIVERSITY, NEW YORK, N. Y. ROBERT J WRIGHT COLUMBIA UNIVERSITY, NEW YORK, N. Y. Publisher: Geological Society of America Received: 25 Feb 1949 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1950, The Geological Society of America, Inc. Copyright is not claimed on any material prepared by U.S. government employees within the scope of their employment. GSA Bulletin (1950) 61 (4): 275–347. https://doi.org/10.1130/0016-7606(1950)61[275:HAASRN]2.0.CO;2 Article history Received: 25 Feb 1949 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation PAUL F KERR, J. L KULP, C MEADE PATTERSON, ROBERT J WRIGHT; HYDROTHERMAL ALTERATION AT SANTA RITA, NEW MEXICO. GSA Bulletin 1950;; 61 (4): 275–347. doi: https://doi.org/10.1130/0016-7606(1950)61[275:HAASRN]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 The intrusives at Santa Rita and near-by Hanover differ widely in the extent of hydrothermal alteration. The Santa Rita intrusive is in many places highly kaolinized, sericitized, and silicified. The Hanover intrusive is to a large degree unaltered.The study has centered around the hydrothermal alteration of the intrusive and to a lesser degree, alteration in dikes and sills in the vicinity. On the basis of field and laboratory criteria, four stages of alteration in the Santa Rita intrusive have been selected: (1) Areas of negligible alteration; (2) Areas of significant visible changes in the feldspars and ferro-magnesian minerals; (3) Areas of argillic alteration; and (4) Areas of sericitization and silicification. Comparison of ore distribution with alteration indicates that the highest concentration of copper is in general related to Stage 3. Secondary enrichment of chalcocite has contributed to the formation of ore in the argillic area, but some chalcocite may have been originally introduced with the argillic alteration of the Santa Rita intrusive. Comparable copper deposition has not been observed in the Hanover intrusive.A considerable amount of oxidation occurs in some portions of the deposit, and areas near the surface have been extensively leached, but the change in alteration minerals previously formed appears minor.Studies at Santa Rita indicate the utility of applying zones of alteration in field mapping, to outline areas of greater and lesser promise from the standpoint of mineralization. Data of considerable aid to the general projection of a drilling program are also developed. 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.