Origin of the late Paleozoic plutonic massifs in Morocco

Vogel, Thomas A.; Williams, E. Ruth; Preston, John K.; Walker, Bruce M.

doi:10.1130/0016-7606(1976)87<1753:ootlpp>2.0.co;2

Cited by 14 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The granitoids of the Mesetas can be grouped into three main groups (Vogel et al . 1976; Gasquet, Stussi & Nachit, 1996; El Hadi et al . 2006): (1) calc-alkaline biotite±cordierite granodiorites, locally with associated mafic magmas; (2) two-mica leucogranites; and (3) subalkaline–alkaline granites.…”

Section: Geological Setting and Geology Of The Jebilet Magmatismmentioning

confidence: 99%

See 1 more Smart Citation

Geochemical and Sr–Nd isotopic constraints on the petrogenesis and geodynamic significance of the Jebilet magmatism (Variscan Belt, Morocco)

2013

View full text Add to dashboard Cite

In the Variscan fold belt of Morocco, the Jebilet massif is characterized by Palaeozoic metasedimentary rocks intruded by syntectonic magmatism that includes an ultramafic–granitoid bimodal association and peraluminous granodiorites emplaced c. 330 Ma, intruded by younger leucogranites c. 300 Ma. The mafic–ultramafic rocks belong to a tholeiitic series, and display chemical and isotopic signatures consistent with mixing between mantle-derived and crust-derived magmas or assimilation and fractional crystallization. The granites within the bimodal association are mainly metaluminous to weakly peraluminous microgranites that show characteristics of A2-type granites. The peraluminous, calc-alkaline series consists mainly of cordierite-bearing granodiorites enclosing magmatic microgranular enclaves and pelitic xenoliths. Detailed element and isotope data suggest that the alkaline and the peraluminous granitoids were formed in the shallow crust (<30 km) by partial melting of tonalitic sources at high temperatures (up to 900°C) and by partial melting of metasedimentary protoliths at relatively low temperatures (c. 750°C), respectively. Mixing between the coeval mantle-derived and crust-derived magmas contributed to the large variation of initial εNd values and initial Sr isotopic ratios observed in the granitoids. Further contamination occurred by wall-rock assimilation during ascent of the granodioritic plutons to the upper crust. The ultramafic–granitoid association has been intruded by leucogranites that have high initial Sr isotopic ratios and low initial εNd values, indicating a purely crustal origin. The heating events that caused emplacement of the Jebilet magmatism are related to cessation of continental subduction and convective erosion/thinning of the lithospheric mantle during plate convergence.

show abstract

Section: Geological Setting and Geology Of The Jebilet Magmatismmentioning

confidence: 99%

“…1), for example the Tichka massif (Vogel et al . 1976; Gasquet et al . 1992) and Tanncherfi complex (Ajaji et al .…”

Section: Introductionmentioning

confidence: 99%

Geochemical and Sr–Nd isotopic constraints on the petrogenesis and geodynamic significance of the Jebilet magmatism (Variscan Belt, Morocco)

2013

View full text Add to dashboard Cite

show abstract

“…Coexistence in other Moroccan Palaeozoic massifs (e.g. Tichka) of mantlederived basic magmas with granitic magmas produced in the lower crust has led to the suggestion that the heat source was caused by intrusion of mantle material either due to extension and thinning of lithosphere during initial continental rifting (Vogel et al 1976) or along deep-seated fractures accompanying the Hercynian folds (Mahmood, unpub. doctoral thesis, 1980, University of Clermont, France).…”

Section: Discussionmentioning

confidence: 99%

S-type characteristics of the Hercynian granitoids of the Central Palaeozoic Massif, Morocco

Mahmood

Bennani

1984

Geol. Mag.

View full text Add to dashboard Cite

This petrographic and chemical study of the Hercynian granitoids of the Central Palaeozoic Massif of Morocco covers the Zaër, Ment, Oulmès, and Moulay Bouazza plutons. These plutons are formed of biotite or two-mica, quartz-rich granodiorites and monzogranites containing reddish-brown, inclusion-rich biotites as the only essential mafic mineral; zoned plagioclase; and perthitic K-feldspar. The modal contents of micas and K-feldspar are highly variable. The granitoids are generally medium to coarse grained, massive; however foliated varieties are also commonly found, particularly at the contact of the' plutons with sedimentary rocks.The strongly peraluminous character of the granitoids is shown by high normative corundum and high molar Al2O3/(CaO + Na2O + K2O) ratio, and is reflected by the occasional presence of aluminosilicates.The mineralogical and chemical characteristics of the granitoids are similar to those of the S-type granites, and were inherited from the crustal source of the granitic magmas which are thought to have been generated by partial equilibrium fusion of the sandy argillaceous sediments of the Massif. The heat source for the fusion might have been provided by intrusion of mantle-derived material.

show abstract

The origin of the acidic and basic rocks of the Tichka Massif, Morocco, based on rare earth elements

Scott

Vogel

1980

Contr. Mineral. and Petrol.

View full text Add to dashboard Cite

Origin of the late Paleozoic plutonic massifs in Morocco

Cited by 14 publications

References 0 publications

Geochemical and Sr–Nd isotopic constraints on the petrogenesis and geodynamic significance of the Jebilet magmatism (Variscan Belt, Morocco)

Geochemical and Sr–Nd isotopic constraints on the petrogenesis and geodynamic significance of the Jebilet magmatism (Variscan Belt, Morocco)

S-type characteristics of the Hercynian granitoids of the Central Palaeozoic Massif, Morocco

The origin of the acidic and basic rocks of the Tichka Massif, Morocco, based on rare earth elements

Contact Info

Product

Resources

About