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Late Jurassic to Early Cretaceous plutonism in the Colombian Andes: A record of long-term arc maturity
2016; Geological Society of America; Volume: 128; Issue: 11-12 Linguagem: Inglês
10.1130/b31307.1
ISSN1943-2674
AutoresCamilo Bustamante, Carlos José Archanjo, A. Cardona, Jeffrey D. Vervoort,
Tópico(s)earthquake and tectonic studies
ResumoResearch Article| November 01, 2016 Late Jurassic to Early Cretaceous plutonism in the Colombian Andes: A record of long-term arc maturity Camilo Bustamante; Camilo Bustamante † 1Instituto de Geociências, Universidade de São Paulo, Rua do Lago 562, CEP 05508-080, São Paulo, SP, Brazil †camilobl83@yahoo.com Search for other works by this author on: GSW Google Scholar Carlos J. Archanjo; Carlos J. Archanjo 1Instituto de Geociências, Universidade de São Paulo, Rua do Lago 562, CEP 05508-080, São Paulo, SP, Brazil Search for other works by this author on: GSW Google Scholar Agustín Cardona; Agustín Cardona 2Departamento de Procesos y Energía, Facultad de Minas, Universidad Nacional, Carrera 80 # 65-223, Medellín, Colombia Search for other works by this author on: GSW Google Scholar Jeffrey D. Vervoort Jeffrey D. Vervoort 3Department of the Environment, Washington State University, Pullman, Washington 99164, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Camilo Bustamante † 1Instituto de Geociências, Universidade de São Paulo, Rua do Lago 562, CEP 05508-080, São Paulo, SP, Brazil Carlos J. Archanjo 1Instituto de Geociências, Universidade de São Paulo, Rua do Lago 562, CEP 05508-080, São Paulo, SP, Brazil Agustín Cardona 2Departamento de Procesos y Energía, Facultad de Minas, Universidad Nacional, Carrera 80 # 65-223, Medellín, Colombia Jeffrey D. Vervoort 3Department of the Environment, Washington State University, Pullman, Washington 99164, USA †camilobl83@yahoo.com Publisher: Geological Society of America Received: 27 Feb 2015 Revision Received: 05 May 2016 Accepted: 29 May 2016 First Online: 23 Jun 2017 Online Issn: 1943-2674 Print Issn: 0016-7606 © 2016 Geological Society of America GSA Bulletin (2016) 128 (11-12): 1762–1779. https://doi.org/10.1130/B31307.1 Article history Received: 27 Feb 2015 Revision Received: 05 May 2016 Accepted: 29 May 2016 First Online: 23 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Camilo Bustamante, Carlos J. Archanjo, Agustín Cardona, Jeffrey D. Vervoort; Late Jurassic to Early Cretaceous plutonism in the Colombian Andes: A record of long-term arc maturity. GSA Bulletin 2016;; 128 (11-12): 1762–1779. doi: https://doi.org/10.1130/B31307.1 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 Integrated geochemical, isotopic, and geochronological constraints from Jurassic plutonic rocks of the Central Cordillera in Colombia were used to determine the tectonic setting and long-term tectonomagmatic evolution of the Northern Andes. We examined three plutonic units with compositions that vary from diorite to granite and with U-Pb zircon crystallization ages from 165 Ma to 129 Ma. These units are interpreted as subduction-related magmas, as indicated by their K2O, Na2O contents, light to heavy rare earth element (LREE/HREE) ratios, and Pb isotope signatures. The Nd and Hf isotope compositions of these magmatic events become more juvenile (radiogenic) with time. This compositional record suggests an arc maturity trend in which partial melting of basaltic and peridotitic sources becomes more significant than radiogenic subducted sediments or the ancient continental crust. Global-scale tectonic reconstructions suggest that Late Jurassic to Early Cretaceous subduction of the Farallon oceanic plate under the Andean continental margin became highly oblique. The consequence was a reduction of the fusible sedimentary budget commonly incorporated during subduction into the mantle, leaving a more refractory mantle with a more primitive compositional signature, and a major decrease in magmatic activity in the Early Cretaceous. In addition, the magmatic evolution recorded in the North Andean Jurassic arc shows that long-term source evolution and regional-scale plate-tectonic processes also play an important role in the compositional evolution and volumes of magmatic products in convergent settings. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
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