High Sr/Y Magma Petrogenesis and the Link to Porphyry Mineralization as Revealed by Garnet-Bearing I-Type Granodiorite Porphyries of the Middle Cauca Au-Cu Belt, Colombia

Bissig, Thomas; Leal-Mejía, Hildebrando; Stevens, Roger B.; Hart, Craig J.R.

doi:10.2113/econgeo.112.3.551

Cited by 31 publications

(31 citation statements)

References 46 publications

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“…Leal-Mejía (2011, and focused their studies on Phanerozoic gold metallogeny in the northern Andes, including gold-bearing associated porphyries in the CF. Most recently, Bissig et al (2017) studied the origin of garnet-bearing magmas in the Colombian Middle Cauca Metallogenic Belt. Tassinari et al (2008) suggested a juvenile, mantle-derived magma as the primary source of calc-alkaline to tholeiitic magmatism, based on isotopic data.…”

Section: El Botón Magmatic Arcmentioning

confidence: 99%

“…In the Marmato Stock, hydrothermal activity occurred at 5.6 Ma, which is later than the reactivation of the Cauca-Romeral Fault System at approximately 6.3 Ma. Bissig et al (2017) described the garnet-bearing porphyry systems of Tesorito and El Poma located in the Colombian Middle Cauca Metallogenic Belt. They interpreted their formation as occurring from a rapidly ascending magma that melted in the lower crust, at pressures above 1 GPa.…”

Section: El Botón Magmatic Arcmentioning

confidence: 99%

“…The present work represents an effort to synthesize an essential amount of petrography, field relationships, mineral chemistry, geochronological, and geochemical data previously reported associated with volcanic, volcaniclastic, hypabyssal, porphyritic magmatism and sedimentary rocks of the Combia Formation found along the Cauca River valley. The authors here combine unpublished petrography, mineral chemistry, geochronological, and geochemical data with previous data available from Jaramillo (1976), Álvarez (1983), Marriner & Millward (1984), Ordóñez-Carmona (2001), Dunia (2005), Tejada et al (2007), Tassinari et al, (2008), Leal-Mejia (2011), Borrero & Toro-Toro (2016, Bissig et al (2017), Jaramillo et al (2019), and Bernet et al (2020) to better understand this unique geological occurrence in Colombia.…”

Section: Introductionmentioning

confidence: 99%

“…Only a few studies have discussed their genesis and tectonic setting (e.g., Bernet et al, 2020;Jaramillo et al, 2019;Marriner & Millward, 1984;Rodríguez & Zapata, 2014). Several authors (Bissig et al, 2017;Jaramillo, 1976;Ramírez et al, 2006) suggest that the CSVI and the CF were generated by a subduction zone related to the magmatic arc. In addition, they argue that the magmatic setting started as a protoarc (tholeiitic series) and then moved towards a more mature arc (calc-alkaline series).…”

Section: Introductionmentioning

confidence: 99%

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Chapter 12

SGC¹

2019

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A transtensional basin setting originated the Combia Volcanic Province in the northern Andes of Colombia. Volcanism is heterogeneous encompasses tholeiitic, calc-alkaline, and shoshonitic magmatic series. A review of existing geochemical and geochronological data suggests that all magma series coexisted between 12 and 6 Ma but originated from different processes. Tholeiites formed via the melting of a modified primitive mantle source, with limited sedimentary or continental-contaminant input. Calc-alkaline magmas are mainly adakitic and formed from fractionation of garnet and amphibole at high pressures from a hydrous melt from an enriched source. Petrographic and mineral chemistry of garnet-bearing rocks indicate that magmas underwent at least three ascent phases that include: (1) crystallization of high-pressure phenocryst phases at 900 °C and 1200 GPa in a mantle-derived melt, (2) stalling of differentiated magma at lower-pressure conditions, and (3) stalling at shallower conditions, where decompression occurred. Shoshonitic magmas formed via from a mantle with sedimentary or continental-contaminant input source in the plagioclase stability field. Finally, Combia Volcanic Province's formation was enhanced by the Caldas Tear, a slab window developed by the subduction of the Sandra Ridge beneath the South American Plate.

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Section: El Botón Magmatic Arcmentioning

confidence: 99%

Section: El Botón Magmatic Arcmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Chapter 12

SGC¹

2019

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“…For example, Kolb, et al [11] argued that these rocks show an adakitic affinity expressed by high Sr/Y values and low Y and HREE contents [52,53]. It is generally known that the adakite affinity is commonly present in andesite/diorite rocks associated with porphyry-epithermal systems (e.g., [54][55][56]). The previous studies suggest that the Timok andesites acquired their adakitic geochemical signature via AFC (assimilation-fractional crystallization) processes in which high-pressure accumulation of amphibole had played an important role [11].…”

Section: The Main Mineralization Event In the Bmz Revisitedmentioning

confidence: 99%

New Constraints on the Main Mineralization Event Inferred from the Latest Discoveries in the Bor Metallogenetic Zone (BMZ, East Serbia)

et al. 2019

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This study aims at better constraining the link between magmatism and metallogeny in the south-easternmost sector of the Bor Metallogenetic Zone (BMZ), where the world-class copper and gold deposit of Čukaru Peki was recently discovered. The obtained U/Pb zircon ages confirm the earlier knowledge that the major Cu–Au porphyry and epithermal mineralization in the BMZ is genetically related to the first volcanic phase (‘Timok andesite’; 85–90 Ma). However, the data also suggest that during this phase, two subgroups of andesite porphyry were formed; they are named volcanic phase 1A (V1A) and volcanic phase 1B (V1B). The V1A andesite (89–90 Ma) is plagioclase-hornblende phyric, holocrystalline and ubiquitously hydrothermally altered and/or mineralized, whereas the V1B (85–86 Ma) is hornblende-plagioclase phyric, holo- to hypocrystalline, fresh, and non-mineralized. According to our simplified model, the contrasting productivity of the V1A and V1B is explained by fluctuations during AFC (assimilation-fractional crystallization) processes of water-rich parental magma, which have controlled the order of crystallization of hornblende and plagioclase in the V1A and V1B andesite.

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