Geotermobarometria, geoquímica, geocronologia e evolução tectônica das rochas da fácies xisto azul da Colômbia nas áreas de Jambaló (Cauca) e Barragán (Valle del Cauca)

Londoño, Andrés Bustamante

doi:10.11606/t.44.2008.tde-22082008-155904

Cited by 3 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Most of these complexes are characterized by blueschist, eclogite, and other HP-LT rock types that are indicative of a subduction zone environment. In the Middle America and Caribbean regions (Figure 1), Late Jurassic to Eocene HP-LT rocks are exposed almost continuously from California to Baja California (Sedlock et al 1993;Patrick and Day 1995), in the central Pacific region of Mexico (Talavera-Mendoza 2000), along the Motagua valley in Guatemala (Harlow et al 2004;Ortega-Gutiérrez et al 2004), in southeastern Jamaica (Lewis et al 1973;Draper 1986), throughout Cuba (Somin et al 1992;Schneider et al 2004;García-Casco et al 2006;Stanek et al 2006), along the northern coast of the Dominican Republic (Giaramita and Sorensen 1994;Abbott et al 2005;Krebs et al 2008), in the Puerto Rico Trench (Perfit et al 1980), along the Caribbean mountain systems of Venezuela and northern Colombia (Green et al 1968;Stöckhert et al 1995;Sisson et al 1997;Smith et al 1999), along the Central Cordillera of Colombia (Orrego et al 1980;Feininger 1982;Bustamante 2008), and in the southern Pacific region of Ecuador (Feininger 1980;Arculus et al 1999;Bosch et al 2002). These HP-LT rocks occur as (1) coherent oceanic and continental metamorphic belts (e.g.…”

Section: Introductionmentioning

confidence: 99%

Metamorphic history of riebeckite- and aegirine-augite-bearing high-pressure–low-temperature blocks within the Siuna Serpentinite Mélange, northeastern Nicaragua

Flores

Skora

Martin

et al. 2015

International Geology Review

View full text Add to dashboard Cite

The Siuna Serpentinite Mélange (SSM) is a subduction-zone-related complex that contains diverse blocks of igneous and sedimentary origin, overprinted by various metamorphic conditions. The SSM is located at the southern border of the Chortís block and marks the boundary between continental and oceanic crusts in the western margin of the Caribbean Plate. The serpentinite matrix mainly consists of lizardite/chrysotile, Cr-rich spinel, and relict orthopyroxene that suggest a harzburgitic protolith and an upper mantle supra-subduction zone origin. Blocks within the southern and central regions range from Jurassic pelagic sediments to mafic/intermediate igneous rocks that are metamorphosed to various degrees, ranging from prehnite-pumpellyite/greenschist to likely blueschist facies (e.g. riebeckite-bearing metashale) conditions. In contrast, the northern section encloses almost exclusively epidote-amphibolite facies metabasite blocks, and minor micaand chlorite-rich rocks of metasomatic origin, respectively. Some of the epidote-amphibolite blocks contain relic garnet-rich zones embedded in an amphibole-rich matrix. The garnets appear to record two generations of growth and contain mineral inclusions such as amphibole, apatite, titanite, aegirine-augite, and quartz. Thermobarometric estimates for the garnet-rich zones and epidote-amphibolite-rich matrix suggest a prograde blueschist facies at~1.2 GPa and 400-450°C, an eclogite facies metamorphic peak at 1.5-1.7 GPa and 565-614°C, and a post-peak epidote-amphibolite facies metamorphism. These pressure and temperature estimates indicate a classical clockwise PT path that has been observed in many palaeo-subduction zone environments worldwide. Phengite Ar-Ar dating of mica-rich rock yields 140 Ma and suggests an Early Cretaceous exhumation along the southern edge of the continental Chortís block.

show abstract

Section: Introductionmentioning

confidence: 99%

Metamorphic history of riebeckite- and aegirine-augite-bearing high-pressure–low-temperature blocks within the Siuna Serpentinite Mélange, northeastern Nicaragua

Flores

Skora

Martin

et al. 2015

International Geology Review

View full text Add to dashboard Cite

show abstract

“…ESRMRS from Angiboust et al (2017Angiboust et al ( , 2018, Avellaneda-Jiménez et al (2022), Bocchio et al (1996), Brook (1984), A. Bustamante (2008), A. Bustamante et al (2011Bustamante et al ( , 2012, Casquet et al (2001), Davis et al (1999), Duhart and Adriasola (2008), Duhart et al (2001), Feininger and Silberman (1982), Flores et al (2019), Gabriele (2002), García-Ramírez et al (2017), Glodny et al (2005Glodny et al ( , 2008, González-Jiménez et al (2017), Grunow et al (1992), Halpern (1973), Hervé et al (1981), Höfer et al (2001), Hyppolito et al (2014Hyppolito et al ( , 2016, John et al (2010), Kato and Godoy (1995), Kato et al (2008), Kohn et al (1995), Maloney et al (2011), Martínez et al (2012), Ramos et al (1998), Romero et al (2018), Sisson et al (1997Sisson et al ( , 2005, Smith et al (1999), Stöckhert et al (1995), Toussaint and Restrepo (1978), van Staal et al (2011), Viete et al (2015), Vujovich et al (2004),…”

Section: Introductionmentioning

confidence: 99%

“…(2022), Bocchio et al. (1996), Brook (1984), A. Bustamante (2008), A. Bustamante et al. (2011, 2012), Casquet et al.…”

Section: Introductionmentioning

confidence: 99%

Exhumed Serpentinites and Their Tectonic Significance in Non‐Collisional Orogens

Donoso‐Tapia,

Flores,

Martin

et al. 2024

Geochem Geophys Geosyst

View full text Add to dashboard Cite

Exhumed serpentinites are fragments of ancient oceanic lithosphere or mantle wedge that record deep fluid‐rock interactions and metasomatic processes. While common in suture zones after closure of ocean basins, in non‐collisional orogens their origin and tectonic significance are not fully understood. We study serpentinite samples from five river basins in a segment of the non‐collisional Andean orogen in Ecuador (Cordillera Real). All samples are fully serpentinized with antigorite as the main polymorph, while spinel is the only relic phase. Watershed delineation analysis and in‐situ B isotope data suggest four serpentinite sources, linked to mantle wedge (δ11B = ∼−10.6 to −0.03‰) and obducted ophiolite (δ11B = −2.51 to +5.73‰) bodies, likely associated with Triassic, Jurassic‐Early Cretaceous, and potentially Late Cretaceous‐Paleocene high‐pressure (HP)–low‐temperature metamorphic sequences. Whole‐rock trace element data and in‐situ B isotopes favor serpentinization by a crust‐derived metamorphic fluid. Thermodynamic modeling in two samples suggests serpentinization at ∼550–500°C and pressures from 2.5 to 2.2 GPa and 1.0–0.6 GPa for two localities. Both samples record a subsequent overprint at ∼1.5–0.5 GPa and 680–660°C. In the Andes, regional phases of slab rollback have been reported since the mid‐Paleozoic to Late Cretaceous. This tectonic scenario favors the extrusion of HP rocks into the forearc and the opening of back‐arc basins. Subsequent compressional phases trigger short‐lived subduction in the back‐arc that culminates with ophiolite obduction and associated metamorphic rock exhumation. Thus, we propose that serpentinites in non‐collisional orogens are sourced from extruded slivers of mantle wedge in the forearc or obducted ophiolite sequences associated with regional back‐arc basins.

show abstract

“…As trajetórias retrometamórficas dos xistos azuis e xistos verdes de Jambaló e Barragán (Colômbia) mostram os seguintes padrões: do tipo Alpino, com exumação seguida de resfriamento; de temperatura mais elevada, com leve queda na temperatura, e evolução final com novo aumento da temperatura e queda da pressão, resultando na geração de xistos verdes; e do tipo Franciscano; em que, todas, podem estar relacionadas à exumação de xistos azuis em zonas de cavalgamento (Bustamante, 2008). O autor sugere, embora com reservas, a possibilidade da existência de um tipo de trajetória intermediário entre o Alpino e o Franciscano, já que a presença de aragonita em algumas amostras poderia ser um ponto relevante de comparação com a evolução dos xistos azuis típicos do Franciscano.…”

Section: Tabela 52: Esquemas De Classificação De Eclogitos Modificaunclassified

“…Desta maneira, o estudo do metamorfismo mostra que a exumação dos xistos azuis da ilha Diego de Almagro é tectonicamente coerente com o modelo proposto por Olivares et al, (2003) Como observado para os xistos azuis da região de Pichilemu (Hyppolito, 2007), e para algumas trajetórias de xistos azuis de Jambaló e Barragán (Bustamante, 2008) 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 BMn 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 Soma_C 5,00 5,00 5,00 5,00 5,00 5,00 5,00 5,00 5,00 5,00 5,00 5,00 5,00 BMg 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00…”

Section: Conclusãounclassified

Termobarometria, evolução tectono-metamórfica, e geoquímica de xistos azuis, rochas eclogíticas e litotipos associados da Ilha Diego de Almagro, Patagônia Chilena

Hyppolito¹

View full text Add to dashboard Cite

Geotermobarometria, geoquímica, geocronologia e evolução tectônica das rochas da fácies xisto azul da Colômbia nas áreas de Jambaló (Cauca) e Barragán (Valle del Cauca)

Cited by 3 publications

References 0 publications

Metamorphic history of riebeckite- and aegirine-augite-bearing high-pressure–low-temperature blocks within the Siuna Serpentinite Mélange, northeastern Nicaragua

Metamorphic history of riebeckite- and aegirine-augite-bearing high-pressure–low-temperature blocks within the Siuna Serpentinite Mélange, northeastern Nicaragua

Exhumed Serpentinites and Their Tectonic Significance in Non‐Collisional Orogens

Termobarometria, evolução tectono-metamórfica, e geoquímica de xistos azuis, rochas eclogíticas e litotipos associados da Ilha Diego de Almagro, Patagônia Chilena

Contact Info

Product

Resources

About