Late Jurassic terrane collision in the northwestern margin of Gondwana (Cajamarca Complex, eastern flank of the Central Cordillera, Colombia)

Blanco-Quintero, Idael Francisco; García-Casco, Antonio; Toro, Luz Mary Toro; Moreno, Mario; Ruiz, Elvira Cristina; Vinasco, César Javier; Cardona, A.; Lázaro, Concepción; Morata, Diego

doi:10.1080/00206814.2014.963710

Cited by 69 publications

(78 citation statements)

References 44 publications

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“…110 Ma (Villagómez et al, 2011). A Jurassic collisionrelated metamorphic event between 158 Ma and 147 Ma immediately to the west of the northern segment of the Ibagué batholith also took place (Blanco-Quintero et al, 2014). This event overlaps in time with the formation of the studied plutonic rocks that do not show signs of syntectonic intrusion.…”

Section: Jurassic Tectonomagmatic Evolution Of the Northern Andesmentioning

confidence: 88%

“…Available U-Pb and K-Ar geochronological data show that the batholith ranges in age from 189 Ma in the southernmost segment (Bustamante et al, 2010;Leal-Mejía., 2011), to 177 and 145 Ma in the north (Vesga and Barrero, 1978;Sillitoe et al, 1982;Brook, 1984;Aspden et al, 1987;Altenberger and Concha, 2005;Villagómez et al, 2011;Leal-Mejía, 2011). To the east, the Ibagué batholith is probably in tectonic contact with metamorphosed volcano-sedimentary rocks included in the Cajamarca complex (Blanco-Quintero et al, 2014). The metamorphism of part of these metamorphic complexes apparently took place in the Jurassic between 158 Ma and 147 Ma, which is when magmatism was active to the east; therefore, the metamorphism probably took place in an allochthonous position and was subsequently juxtaposed to its current position (Blanco-Quintero et al, 2014).…”

Section: Mesozoic Plutonism In the Southern Central Cordillera And Thmentioning

confidence: 99%

“…To the east, the Ibagué batholith is probably in tectonic contact with metamorphosed volcano-sedimentary rocks included in the Cajamarca complex (Blanco-Quintero et al, 2014). The metamorphism of part of these metamorphic complexes apparently took place in the Jurassic between 158 Ma and 147 Ma, which is when magmatism was active to the east; therefore, the metamorphism probably took place in an allochthonous position and was subsequently juxtaposed to its current position (Blanco-Quintero et al, 2014). The Payandé stock ( Fig.…”

Section: Mesozoic Plutonism In the Southern Central Cordillera And Thmentioning

confidence: 99%

“…This event overlaps in time with the formation of the studied plutonic rocks that do not show signs of syntectonic intrusion. Therefore, following Blanco-Quintero et al (2014), this event may have taken place in an allochthonous position and may reflect along-strike segmentation of the Jurassic margin in an oblique regime, where transpression and transtension behavior were distributed along the margin. As oblique convergence continued and the subducted hybrid mélange was melted, losing the sedimentary input and increasing the basaltic and serpentinite signature, arc magmatism became isotopically more juvenile and refractory.…”

Section: Jurassic Tectonomagmatic Evolution Of the Northern Andesmentioning

confidence: 99%

“…In the subduction-related model, the long-term evolution of the active margin would be characterized by oceanward arc migration due to slab roll-back (Cochrane et al, 2014a). Alternative scenarios include the translation of terranes from southern latitudes in an oblique convergence setting that would juxtapose Jurassic metamorphic terranes with a magmatic arc also of Jurassic age (Bayona et al, 2006;Blanco-Quintero et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Late Jurassic to Early Cretaceous plutonism in the Colombian Andes: A record of long-term arc maturity

Bustamante

Archanjo

Cardona

et al. 2016

Geological Society of America Bulletin

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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 K 2 O, Na 2 O 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 radio genic 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 regionalscale plate-tectonic processes also play an important role in the compositional evolution and volumes of magmatic products in convergent settings.

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Section: Jurassic Tectonomagmatic Evolution Of the Northern Andesmentioning

confidence: 88%

Section: Mesozoic Plutonism In the Southern Central Cordillera And Thmentioning

confidence: 99%

Section: Mesozoic Plutonism In the Southern Central Cordillera And Thmentioning

confidence: 99%

Section: Jurassic Tectonomagmatic Evolution Of the Northern Andesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Late Jurassic to Early Cretaceous plutonism in the Colombian Andes: A record of long-term arc maturity

Bustamante

Archanjo

Cardona

et al. 2016

Geological Society of America Bulletin

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Geochemistry and geochronology of Permian plutonic rocks at the north‐western margin of Gondwana

et al. 2023

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The occurrence of Permian magmatic rocks in the Colombian Andes is restricted to a few localities. Previous works have focused mainly on explaining its tectonic setting, whereas petrogenesis has received less attention. This study closes this gap by reporting whole‐rock geochemistry, zircon U–Pb geochronology, trace elements and Hf isotopes from massive and mylonitic granitoids along central Colombia to constrain their age, source and petrogenesis. Our results show that the granitoids have a calc‐alkaline character, are rich in light‐rare elements (LREEs) and large‐ion lithophile elements (LILEs), present negative Nb and Ti anomalies, crystallized between ca. 276–265 Ma and show variable εHf(i) values ranging from −1.5 to +1.7. Combining our results with published geochemical, geochronological and isotopic data from this region, we suggest that the Middle Permian granitoids from the Tolima region were formed in a continental magmatic arc installed at the western margin of Gondwana, where partial melting of the mantle wedge and further crustal assimilation of the magmas with an old radiogenic and heterogeneous crust were essential processes for the modification of the source of the magmas that generated the granitoids. The Middle Permian may have reached the peak magmatic conditions (ca. 280–270 Ma), according to the recurrence of ages in this time interval. This period of magmatic activity may have been interrupted by the Triassic extensional period related to the beginning of the Pangea breakup.

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Evidence for welding of a block and ash pyroclastic flow deposit: the case of Cerro Bravo Volcano, Colombia

et al. 2019

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Cerro Bravo is an active composite volcano located in the San Diego-Cerro Machín Volcano-Tectonic Province (SCVTP), the northernmost volcanic chain in the Colombian Andes. Among the products associated with the volcano, there is a peculiar "indurated" deposit emplaced between 7 and 2.9 ka, which resembles a block and ash pyroclastic flow deposit. Through field observations, physical property analyses, petrography and scanning electron microscopy (SEM), we demonstrate that this induration is the result of welding processes. High density, deformed glassy fragments with a common orientation, low porosity, fiamme and sintering, are the most visible characteristics. The evidence indicates that welding reached up to rank IV in a I to VI classification scheme. We suggest that welding is associated with (1) high emplacement temperature related to the syneruptive destruction of a growing endogenous dome and (2) a low glass transition temperature related to the influence of upward water diffusion after emplacement of the flow over wet ground. Thus, with emplacement temperatures between 670 and 540 °C, and water contents between 0.5 and 1.2 wt%, the welding process was unusually efficient. Calculations made indicate that for the deposit to present the observed characteristics of welding, the emplacement temperature needed to exceed the threshold of the glass transition temperature for a time of 5-6 days and have an effective viscosity of 10 12 Pa s. As a result of the welding, the deposit decreased its thickness by between 15 and 7 m. This work contributes to the knowledge of welding processes and stresses the unusual occurrence of welding in this type of pyroclastic flow deposit which thus requires special emplacement conditions in terms of temperature and water content.

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Late Jurassic terrane collision in the northwestern margin of Gondwana (Cajamarca Complex, eastern flank of the Central Cordillera, Colombia)

Cited by 69 publications

References 44 publications

Late Jurassic to Early Cretaceous plutonism in the Colombian Andes: A record of long-term arc maturity

Late Jurassic to Early Cretaceous plutonism in the Colombian Andes: A record of long-term arc maturity

Geochemistry and geochronology of Permian plutonic rocks at the north‐western margin of Gondwana

Evidence for welding of a block and ash pyroclastic flow deposit: the case of Cerro Bravo Volcano, Colombia

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