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Geochemistry of tholeiites of the Basic Igneous Complex of northwestern South America

1977; Geological Society of America; Volume: 88; Issue: 12 Linguagem: Inglês

10.1130/0016-7606(1977)88 2.0.co;2

1943-2674

Pierre J. Goossens, William I. Rose, Decio Flores,

Hydrocarbon exploration and reservoir analysis

Research Article| December 01, 1977 Geochemistry of tholeiites of the Basic Igneous Complex of northwestern South America P. J. GOOSSENS; P. J. GOOSSENS 1Department of Geology and Geological Engineering, Michigan Technological University, Houghton, Michigan 49931 Search for other works by this author on: GSW Google Scholar W. I. ROSE, JR.; W. I. ROSE, JR. 1Department of Geology and Geological Engineering, Michigan Technological University, Houghton, Michigan 49931 Search for other works by this author on: GSW Google Scholar DECIO FLORES DECIO FLORES 1Department of Geology and Geological Engineering, Michigan Technological University, Houghton, Michigan 49931 Search for other works by this author on: GSW Google Scholar Author and Article Information P. J. GOOSSENS 1Department of Geology and Geological Engineering, Michigan Technological University, Houghton, Michigan 49931 W. I. ROSE, JR. 1Department of Geology and Geological Engineering, Michigan Technological University, Houghton, Michigan 49931 DECIO FLORES 1Department of Geology and Geological Engineering, Michigan Technological University, Houghton, Michigan 49931 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1977) 88 (12): 1711–1720. https://doi.org/10.1130/0016-7606(1977)88 2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation P. J. GOOSSENS, W. I. ROSE, DECIO FLORES; Geochemistry of tholeiites of the Basic Igneous Complex of northwestern South America. GSA Bulletin 1977;; 88 (12): 1711–1720. doi: https://doi.org/10.1130/0016-7606(1977)88 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 Chemical analyses of basaltic rocks from the Basic Igneous Complex of the Pacific coastal areas of northern South America clearly demonstrate a consistent tholeiitic affinity for this belt and a geochemical similarity of samples from Ecuador, Colombia, and Panama. The rocks are more like ocean-ridge tholeiites than other varieties, but they have higher than expected K, Sr, and Rb contents. Most probably, alteration has caused these anomalies, but a firm conclusion has been frustrated by the lack of correlation of concentration of these elements with the degree of three types of microscopically observable secondary mineralogic changes in the rocks. The rocks form a bimodal geochemical population, about two-thirds basalt and one-third basaltic andesite; both groups are geographically widespread. The increased geochemical information confirms the correlation of this complex with similar rocks in the Cordillera Occidental of Colombia and Ecuador and the Nicoya Peninsula of Costa Rica. 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.