Mechanism of Limestone Replacement at Low Temperatures and Pressures

Research Article| April 01, 1952 MECHANISM OF LIMESTONE REPLACEMENT AT LOW TEMPERATURES AND PRESSURES R. M GARRELS; R. M GARRELS NORTHWESTERN UNIVERSITY, EVANSTON, ILLINOIS; UNIVERSITY OF KANSAS, LAWRENCE, KANSAS. Search for other works by this author on: GSW Google Scholar R. M DREVER R. M DREVER NORTHWESTERN UNIVERSITY, EVANSTON, ILLINOIS; UNIVERSITY OF KANSAS, LAWRENCE, KANSAS. Search for other works by this author on: GSW Google Scholar Author and Article Information R. M GARRELS NORTHWESTERN UNIVERSITY, EVANSTON, ILLINOIS; UNIVERSITY OF KANSAS, LAWRENCE, KANSAS. R. M DREVER NORTHWESTERN UNIVERSITY, EVANSTON, ILLINOIS; UNIVERSITY OF KANSAS, LAWRENCE, KANSAS. Publisher: Geological Society of America Received: 19 Mar 1951 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1952, 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 (1952) 63 (4): 325–380. https://doi.org/10.1130/0016-7606(1952)63[325:MOLRAL]2.0.CO;2 Article history Received: 19 Mar 1951 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation R. M GARRELS, R. M DREVER; MECHANISM OF LIMESTONE REPLACEMENT AT LOW TEMPERATURES AND PRESSURES. GSA Bulletin 1952;; 63 (4): 325–380. doi: https://doi.org/10.1130/0016-7606(1952)63[325:MOLRAL]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 replacement of limestone by supergene copper minerals provides a key to some of the mechanisms of metasomatism at low temperatures and pressures. The replacements studied were of the type in which the host and guest have no ions in common. Although numerous physical and chemical variables were studied, pH is noted to be the major control of metasomatism. The reaction of hydrolyzed, slightly acid solutions provided replacement always essentially volume-for-volume and with duplication of textures. The replacement of limestone by sulfides probably is analogous. Access of mineralizing solutions again is shown to be a function of secondary permeability. Movement outward from secondary openings is indicated to be mainly by diffusion rather than by forced flow. Under special conditions an impenetrable replacement layer, resembling crustification, may form as a result of diffusional replacement. The replacement layer formed where forced flow is a major factor commonly is more irregular than layers formed by diffusion alone. Natural replacement textures resemble the synthetic. The composition of natural replacement products is more complex than those formed synthetically as a result of oscillation in ionic content of the natural solutions. 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.