{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,5,14]],"date-time":"2025-05-14T05:44:41Z","timestamp":1747201481793,"version":"3.40.5"},"reference-count":27,"publisher":"Universidad Industrial de Santander","issue":"1","license":[{"start":{"date-parts":[[2020,1,1]],"date-time":"2020-01-01T00:00:00Z","timestamp":1577836800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["revbol"],"published-print":{"date-parts":[[2020,1,1]]},"abstract":"Se llev\u00f3 a cabo un muestreo de sedimentos fluviales en las microcuencas Chirimoyo y Guineo, en el sector Puyango, provincia de Loja, Ecuador, con el fin de hacer un estudio de prospecci\u00f3n geoqu\u00edmica, determinando valores an\u00f3malos estad\u00edsticamente de CaO (>3,46% en peso), MnO (>0,26% en peso), P2O5 (>12,63% en peso), V (>693 ppm), Zn (>709 ppm), Cu (>108 ppm) y valores suban\u00f3malos de U (>60 ppm) y Ni (>232 ppm) para la subcuenca Chirimoyo. En cuanto a la subcuenca Guineo se determinaron los siguientes valores an\u00f3malos: MnO (>0,47% en peso), TiO2 (>1,16% en peso), valores suban\u00f3malos de CaO (>7,01% en peso), P2O5 (>0,96% en peso), V (>1903 ppm), U (>50 ppm), Ni (>451 ppm) y Zn (>1306 ppm). De acuerdo a los mapas de anomal\u00edas geoqu\u00edmicas los valores m\u00e1s altos de vanadio (2520 ppm en Guineo), uranio (70 ppm en Chirimoyo), zinc (1445 ppm en Guineo) y n\u00edquel (629 ppm en Guineo) se asocian a la parte norte de ambas microcuencas, espec\u00edficamente en el norte de la microcuenca Guineo cercano al sector de La Sota, en donde afloran las rocas sedimentarias de la Formaci\u00f3n Puyango, que contienen calizas bituminosas y lutitas negras calc\u00e1reas, las cuales puedan estar albergando mineralizaciones de estos elementos, esto se evidencia por los valores altos de Ca, lo que indica un origen carbon\u00e1tico de los sedimentos. Los sedimentos est\u00e1n compuestos principalmente de silicatos y aluminosilicatos (arcillas y micas), en menor proporci\u00f3n \u00f3xi-hidr\u00f3xidos de Fe-Ti: goetita, magnetita y anatasa. Adicionalmente se detect\u00f3 calcita y circ\u00f3n en dos muestras. Existe la presencia de minerales de vanadio como sherwoodita, rosita, ronneburgita y sincosita, lo cual corrobora las anomal\u00edas geoqu\u00edmicas de vanadio determinadas mediante an\u00e1lisis qu\u00edmico<\/jats:p>","DOI":"10.18273\/revbol.v42n1-2020002","type":"journal-article","created":{"date-parts":[[2020,3,6]],"date-time":"2020-03-06T19:38:40Z","timestamp":1583523520000},"page":"39-55","source":"Crossref","is-referenced-by-count":1,"title":["Estudio de prospecci\u00f3n geoqu\u00edmica en sedimentos de las microcuencas Chirimoyo y Guineo, Ecuador"],"prefix":"10.18273","volume":"42","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2494-0497","authenticated-orcid":false,"given":"John Luis","family":"Manrique-Carre\u00f1o","sequence":"first","affiliation":[{"name":"Universidad T\u00e9cnica Particular de Loja, San Cayetano Alto, Loja, Ecuador."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7854-8365","authenticated-orcid":false,"given":"Galo Alexander","family":"Guam\u00e1n-Jaramillo","sequence":"additional","affiliation":[{"name":"Universidad T\u00e9cnica Particular de Loja, San Cayetano Alto, Loja, Ecuador."}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"7634","published-online":{"date-parts":[[2020,1,1]]},"reference":[{"key":"ref0","unstructured":"Aguiar, E. 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Ore Geology Reviews, 76, 19-34. doi: 10.1016\/j.oregeorev.2016.01.004.","DOI":"10.1016\/j.oregeorev.2016.01.004"}],"container-title":["Revista Bolet\u00edn de Geolog\u00eda"],"original-title":["Geochemical prospecting study in fluvial sediments of Chirimoyo and Guineo subbasins, Ecuador"],"language":"es","deposited":{"date-parts":[[2020,11,11]],"date-time":"2020-11-11T16:33:07Z","timestamp":1605112387000},"score":1,"resource":{"primary":{"URL":"https:\/\/revistas.uis.edu.co\/index.php\/revistaboletindegeologia\/article\/view\/10352\/10245"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2020,1,1]]},"references-count":27,"journal-issue":{"issue":"1","published-online":{"date-parts":[[2020,1,1]]},"published-print":{"date-parts":[[2020,1,1]]}},"URL":"https:\/\/doi.org\/10.18273\/revbol.v42n1-2020002","relation":{},"ISSN":["2145-8553","0120-0283"],"issn-type":[{"type":"electronic","value":"2145-8553"},{"type":"print","value":"0120-0283"}],"subject":[],"published":{"date-parts":[[2020,1,1]]}}}