<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>2602-8484</journal-id>
<journal-title><![CDATA[FIGEMPA: Investigación y Desarrollo]]></journal-title>
<abbrev-journal-title><![CDATA[Figempa]]></abbrev-journal-title>
<issn>2602-8484</issn>
<publisher>
<publisher-name><![CDATA[Universidad Central de Ecuador ]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2602-84842023000100045</article-id>
<article-id pub-id-type="doi">10.29166/rev&#64257;g.v15i1.4227</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Evidencias de metamorfismo retrógrado en el Complejo Metamórfico El Oro]]></article-title>
<article-title xml:lang=""><![CDATA[Evidence of retrograde metamorphism in the El Oro Metamorphic Complex]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Paucar-Ayala]]></surname>
<given-names><![CDATA[Stalyn David]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ortiz-Muñoz]]></surname>
<given-names><![CDATA[Deymi Jhoel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Solano-Yépez]]></surname>
<given-names><![CDATA[Stalin Paul]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Viteri-Santamaría]]></surname>
<given-names><![CDATA[Francisco Rigoberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Central del Ecuador. Quito  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Ecuador</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Central del Ecuador. Quito  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Ecuador</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Central del Ecuador. Quito  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Ecuador</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Central del Ecuador. Quito  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Ecuador</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2023</year>
</pub-date>
<volume>15</volume>
<numero>1</numero>
<fpage>45</fpage>
<lpage>55</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.senescyt.gob.ec/scielo.php?script=sci_arttext&amp;pid=S2602-84842023000100045&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.senescyt.gob.ec/scielo.php?script=sci_abstract&amp;pid=S2602-84842023000100045&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.senescyt.gob.ec/scielo.php?script=sci_pdf&amp;pid=S2602-84842023000100045&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El Complejo Metamórfico El Oro, ubicado al suroccidente del Ecuador, está formado por distintas rocas metamórficas de grado bajo y alto. Se estudia la evidencia de retrometamorfismo mediante la revisión bibliográfica, en especial, de los resultados obtenidos en el Complejo Metamórfico El Oro (1990-1993) como parte del Proyecto Cordillera Real (1986-1993) y de otras publicaciones recientes. Se ha mencionado evidencia de retrometamorfismo en la Unidad Quebrada Plata de la facies anfibolita a esquistos verdes y en el complejo ofiolítico Raspas de eclogita a esquistos azules. Además, se ha obtenido datos de petrografía de retrometamorfismo en un bloque de eclogita de La Unidad La Chilca. Se describe al metamorfismo retrogrado respecto a la evolución del complejo metamórfico (Unidad Quebrada Plata), los procesos de exhumación, estructuras geológicas asociadas y reacciones minerales.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The El Oro Metamorphic Complex, located in southwestern Ecuador, consists of different low- and high-grade metamorphic rocks. The evidence of retrograde metamorphism is studied through the bibliographic review, especially, of the results obtained in the El Oro Metamorphic Complex (1990-1993) as part of the Cordillera Real Project (1986-1993) and other recent papers. Evidence of retrograde metamorphism has been mentioned in the Quebrada Plata Unit from amphibolite to green schists facies and in the Raspas ophiolitic complex from eclogite to blue schists. In addition, petrographic evidence of retrograde metamorphism has been obtained in an eclogite block from La Chilca Unit. Also, retrograde metamorphism is described regarding the evolution of the metamorphic complex (Quebrada Plata Unit), the exhumation processes, associated geological structures and mineral reactions.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[El Oro]]></kwd>
<kwd lng="es"><![CDATA[eclogita-esquistos azules]]></kwd>
<kwd lng="es"><![CDATA[retrometamorfismo]]></kwd>
<kwd lng="es"><![CDATA[exhumación]]></kwd>
<kwd lng="es"><![CDATA[zona de cizalla]]></kwd>
<kwd lng="en"><![CDATA[El Oro]]></kwd>
<kwd lng="en"><![CDATA[eclogite-green-schists]]></kwd>
<kwd lng="en"><![CDATA[retrograde metamorphism]]></kwd>
<kwd lng="en"><![CDATA[exhumation]]></kwd>
<kwd lng="en"><![CDATA[shear zone]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Aspden]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Bonilla]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
<name>
<surname><![CDATA[Duque]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<source><![CDATA[The El Oro metamorphic complex, Ecuador: Geology and economic mineral deposits]]></source>
<year>1995</year>
<publisher-name><![CDATA[British Geological Survey.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Feininger]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<source><![CDATA[Mapa geológico de la parte occidental de la Provincia de El Oro [1: 50, 000]]]></source>
<year>1978</year>
<publisher-loc><![CDATA[Quito ]]></publisher-loc>
<publisher-name><![CDATA[Escuela Politécnica Nacional.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[The metamorphic &#8220;basement&#8221; of Ecuador.]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Feininger]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<source><![CDATA[Geological Society of America Bulletin]]></source>
<year>1982</year>
<volume>93</volume>
<numero>1</numero>
<issue>1</issue>
</nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Shear zones &#8211; A review]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fossen]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Cavalcante]]></surname>
<given-names><![CDATA[G. C. G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Earth-Science Reviews]]></source>
<year>2017</year>
<volume>171</volume>
<page-range>434-55</page-range></nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Garnet-chloritoid-kyanite metapelites from the Raspas Complex (SW Ecuador): A key eclogite-facies assemblage]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gabriele]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Ballèvre]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Jaillard]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Hernandez]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[European Journal of Mineralogy]]></source>
<year>2003</year>
<volume>15</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>977-89</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Reaction softening by dissolution-precipitation creep in a retrograde greenschist facies ductile shear zone, New Hampshire, USA.]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[McAleer]]></surname>
<given-names><![CDATA[R. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Bish]]></surname>
<given-names><![CDATA[D. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Kunk]]></surname>
<given-names><![CDATA[M. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Sicard]]></surname>
<given-names><![CDATA[K. R.]]></given-names>
</name>
<name>
<surname><![CDATA[Valley]]></surname>
<given-names><![CDATA[P. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Walsh]]></surname>
<given-names><![CDATA[G. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Wathen]]></surname>
<given-names><![CDATA[B. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Wintsch]]></surname>
<given-names><![CDATA[R. P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Journal of Metamorphic Geology]]></source>
<year>2017</year>
<volume>35</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>95-119</page-range></nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Metamorphic and geochronogical study of the Triassic El Oro metamorphic complex, Ecuador: Implications for high-temperature metamorphism in a forearc zone.]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Riel]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Guillot]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Jaillard]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Martelat]]></surname>
<given-names><![CDATA[J.-E.]]></given-names>
</name>
<name>
<surname><![CDATA[Paquette]]></surname>
<given-names><![CDATA[J.-L.]]></given-names>
</name>
<name>
<surname><![CDATA[Schwartz]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Goncalves]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Duclaux]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Thebaud]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Lanari]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Janots]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Yuquilema]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Lithos]]></source>
<year>2012</year>
<volume>156&#8211;159</volume>
<page-range>41-68</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Exhumation processes]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ring]]></surname>
<given-names><![CDATA[U.]]></given-names>
</name>
<name>
<surname><![CDATA[Brandon]]></surname>
<given-names><![CDATA[M. T.]]></given-names>
</name>
<name>
<surname><![CDATA[Willett]]></surname>
<given-names><![CDATA[S. D.]]></given-names>
</name>
<name>
<surname><![CDATA[Lister]]></surname>
<given-names><![CDATA[G. S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Geological Society, London, Special Publications]]></source>
<year>1999</year>
<volume>154</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>1-27</page-range></nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Prograde and retrograde metamorphic fabrics &#8211; a key for understanding burial and exhumation in orogens (Bohemian Massif)]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Skrzypek]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[&#352;típská]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Schulmann]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Lexa]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<name>
<surname><![CDATA[Lexová]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Journal of Metamorphic Geology]]></source>
<year>2011</year>
<volume>29</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>451-72</page-range></nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Sources and Effects of Fluids in Continental Retrograde Shear Zones: Insights from the Kuckaus Mylonite Zone, Namibia.]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Stenvall]]></surname>
<given-names><![CDATA[C. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Fagereng]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Diener]]></surname>
<given-names><![CDATA[J. F. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Harris]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Janney]]></surname>
<given-names><![CDATA[P. E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Geofluids]]></source>
<year>2020</year>
<numero>2020</numero>
<issue>2020</issue>
<page-range>1-21</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Metamorphic Processes. Reactions and Microstructure Development.]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vernon]]></surname>
<given-names><![CDATA[R. H.]]></given-names>
</name>
</person-group>
<source><![CDATA[Geological Magazine]]></source>
<year>1976</year>
<volume>113</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>394</page-range></nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Winter]]></surname>
<given-names><![CDATA[J. D.]]></given-names>
</name>
</person-group>
<source><![CDATA[Principles of igneous and metamorphic petrology]]></source>
<year>2014</year>
<publisher-name><![CDATA[Pearson New International Edition.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Rates of Retrograde Metamorphism and their Implications for the Rheology of the Crust: An Experimental Study.]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Yardley]]></surname>
<given-names><![CDATA[B. W. D.]]></given-names>
</name>
<name>
<surname><![CDATA[Rhede]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Heinrich]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
</person-group>
<source><![CDATA[Journal of Petrolog]]></source>
<year>2014</year>
<volume>55</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>623-41</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Tiny timekeepers witnessing high- rate exhumation processes.]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Zhong]]></surname>
<given-names><![CDATA[X.]]></given-names>
</name>
<name>
<surname><![CDATA[Moulas]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Tajcmanova]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<source><![CDATA[Scientific Reports]]></source>
<year>2018</year>
<volume>8.</volume>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
