The Central Atlantic Magmatic Province (CAMP): A Review

Marzoli, Andréa; Callegaro, Sara; Corso, Jacopo Dal; Davies, Joshua; Chiaradia, Massimo; Youbi, Nassrrdine; Bertrand, Hervé; Reisberg, Laurie; Merle, Renaud; Jourdan, Fred

doi:10.1007/978-3-319-68009-5_4

Cited by 125 publications

(151 citation statements)

References 141 publications

Supporting

Mentioning

140

Contrasting

Unclassified

Order By: Relevance

“…The Kenorland solution encompassing all the three major cratonic clans coexisting in a single supercontinent could explain stratigraphic and metallogenetic resemblances between the Moeda and many of the Paleoproterozoic sequences found in the Superia Craton, but at the same time reconcile it with the strong affinity with the Sclavia clan blocks. Dissimilarities between these in terms of chronology of events and magmatism could be explained as due to diachronism in the evolution of continents, and geological heterogeneity in the processes behind cratonization and intracontinental rifting such as the one observed during the rifting of Pangea (Marzoli et al, 2018).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Two billion years of evolution enclosed in hydrothermal rutile: Recycling of the São Francisco Craton Crust and constraints on gold remobilisation processes

et al. 2019

View full text Add to dashboard Cite

The Quadrilátero Ferrífero in the São Francisco Craton, Brazil is known for its world-class gold deposits hosted by the Rio das Velhas greenstone belt (RdV). As in other greenstone belts, gold is also concentrated in late Archean/early Paleoproterozoic supracrustal units; in this case within the Moeda Formation. This unit has been compared to the Witwatersrand basin where there has been a long-term debate over the nature of the gold and whether it is detrital (placer), hydrothermal or hybrid (modified placer). Presently, links between gold in the Moeda Formation and RdV are tenuous. To enlighten this area of ambiguity, a new approach using chemical, isotopic and mineral inclusion data from detrital rutile found in the gold-bearing horizons of the Moeda Formation is presented. Grain textures and mineral inclusions have contributed to establishing a primary hydrothermal origin for the rutile, related to As-Fe-Cu-Sb-Pb-W rich mineralising fluids. Fe, Nb and V indicate that the likely source of the gold-related rutiles is the Archean banded iron formations within the RdV, where most of the lode-gold occurs. Average Nb/Ta values of these rutiles are lower than average continental crust ratios which suggests fractionation driven by fluid precipitation and/or competing mineral phases. U-Pb data yield primary crystallisation ages older than deposition ages (> 2.58 Ga), supporting the detrital nature of these rutiles. Rutiles record

show abstract

Section: Accepted Manuscriptmentioning

confidence: 99%

Two billion years of evolution enclosed in hydrothermal rutile: Recycling of the São Francisco Craton Crust and constraints on gold remobilisation processes

et al. 2019

View full text Add to dashboard Cite

show abstract

“…% NaCl + CaCl 2 equiv. ), while the intermediate stages related to massive tourmalinisation show temperatures of homogenization of 200-250 • C. The system then evolves toward lower salinity fluids probably belonging to the H 2 O-NaCl-CaCl 2 (11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27) wt. % NaCl equiv.)…”

Section: The Qal'at Mgouna Au-ag(-bi-te) Epithermal Systemmentioning

confidence: 99%

“…These terranes were the site of recurring tectonic activity and periods of intense magmatic activity. The most important magmatic pulses occurred during the Mesoproterozoic [6][7][8] and at the end of Triassic when the Central Atlantic Magmatic Province (CAMP) was emplaced [9][10][11]. According to Ernst [12] and Ernst and Bleeker [13], both events have been related to large igneous provinces (LIPs).…”

Section: Introductionmentioning

confidence: 99%

The Jbel Saghro Au(–Ag, Cu) and Ag–Hg Metallogenetic Province: Product of a Long-Lived Ediacaran Tectono-Magmatic Evolution in the Moroccan Anti-Atlas

et al. 2018

View full text Add to dashboard Cite

The Jbel Saghro is interpreted as part of a long-lived silicic large igneous province. The area comprises two lithostructural complexes. The Lower Complex consists of folded metagreywackes and N070–090°E dextral shear zones, which roughly results from a NW–SE to NNW–SSE shortening direction related to a D1 transpressive tectonic stage. D1 is also combined with syntectonic plutons emplaced between ca. 615 and 575 Ma. The Upper Complex is defined by ash-flow caldera emplacements, thick and widespread ignimbrites, lavas and volcaniclastic sedimentary rocks with related intrusives that were emplaced in three main magmatic flare ups at ca. 575, 565 and 555 Ma. It lies unconformably on the Lower Complex units and was affected by a D2 trantensive tectonic stage. Between 550 and 540 Ma, the magmatic activity became slightly alkaline and of lower extent. Ore deposits show specific features, but remain controlled by the same structural setting: a NNW–SSE shortening direction related to both D1 and D2 stages. Porphyry Au(–Cu–Mo) and intrusion-related gold deposits were emplaced in an earlier stage between 580 and 565 Ma. Intermediate sulfidation epithermal deposits may have been emplaced during lull periods after the second and (or) the third flare-ups (560–550 Ma). Low sulfidation epithermal deposits were emplaced late during the felsic alkaline magmatic stage (550–520 Ma). The D2 stage, therefore, provided extensional structures that enabled fluid circulations and magmatic-hydrothermal ore forming processes.

show abstract

“…In this study, we investigate the history of volatiles in the magmas of the Central Atlantic Magmatic Province (CAMP), one of Earth's largest LIPs 17,18 , by analysing volatiles in melt inclusions (MIs), particularly CO 2 . We examine the implications of these findings for magma eruption history and subsequent impact on the global climate.…”

mentioning

confidence: 99%

Deep CO2 in the end-Triassic Central Atlantic Magmatic Province

et al. 2020

Self Cite

View full text Add to dashboard Cite

Large Igneous Province eruptions coincide with many major Phanerozoic mass extinctions, suggesting a cause-effect relationship where volcanic degassing triggers global climatic changes. In order to fully understand this relationship, it is necessary to constrain the quantity and type of degassed magmatic volatiles, and to determine the depth of their source and the timing of eruption. Here we present direct evidence of abundant CO 2 in basaltic rocks from the end-Triassic Central Atlantic Magmatic Province (CAMP), through investigation of gas exsolution bubbles preserved by melt inclusions. Our results indicate abundance of CO 2 and a mantle and/or lower-middle crustal origin for at least part of the degassed carbon. The presence of deep carbon is a key control on the emplacement mode of CAMP magmas, favouring rapid eruption pulses (a few centuries each). Our estimates suggest that the amount of CO 2 that each CAMP magmatic pulse injected into the end-Triassic atmosphere is comparable to the amount of anthropogenic emissions projected for the 21 st century. Such large volumes of volcanic CO 2 likely contributed to end-Triassic global warming and ocean acidification.

show abstract

The Central Atlantic Magmatic Province (CAMP): A Review

Cited by 125 publications

References 141 publications

Two billion years of evolution enclosed in hydrothermal rutile: Recycling of the São Francisco Craton Crust and constraints on gold remobilisation processes

Two billion years of evolution enclosed in hydrothermal rutile: Recycling of the São Francisco Craton Crust and constraints on gold remobilisation processes

The Jbel Saghro Au(–Ag, Cu) and Ag–Hg Metallogenetic Province: Product of a Long-Lived Ediacaran Tectono-Magmatic Evolution in the Moroccan Anti-Atlas

Deep CO2 in the end-Triassic Central Atlantic Magmatic Province

Contact Info

Product

Resources

About