Petrogenesis of metaluminous and peraluminous granitoids from Garga-Sarali zone : evidence of I- and S-type sources (central African fold belt in Cameroon)

Daama Isaac; Mbowou Gbambie Isaac Bertrand; Nguihdama Dagwaï; Ngounouno Ismaïla

doi:10.14419/gd4zjr47

Article Details

Petrogenesis of metaluminous and peraluminous granitoids from Garga-Sarali zone : evidence of I- and S-type sources (central African fold belt in Cameroon)

Authors:

Daama Isaac | Mbowou Gbambie Isaac Bertrand | Nguihdama Dagwaï | Ngounouno Ismaïla

Publisher:

Science Publishing Corporation

Journal:

International Journal of Advanced Geosciences Vol.12 Issue 1, pp.47-55

Document Type:

Article

Publication Date:

4/2024

Document Language:

English

Document ID (Org No.):

2001386766

pISSN:

2311-7044

DOI:

10.14419/gd4zjr47

Keywords:

Abstract:

 The Garga-Sarali granitoids outcrop from a metamorphic basement in the central-eastern part of the Central Cameroonian Domain of the Central African fold belt in Cameroon, and are petrographically very complex. They can be divided into two types : (1) Granodiorites of metaluminous type-I, with a fine-grained porphyritic variant texture, consisting of quartrz + orthoclase + microcline + plagioclase + biotite + zircon + oxides ± apatite; (2) and two-mica granites of hyper-aluminous type-S, with a grainy texture, consisting of the same quartzo + k-feldspars + biotite + cordierite ± apatite. These formations both belong to a calc-alkaline-subalkaline, hyper-potassic to shoshonitic signature, and to the tectonic domains of volcanic arc granites. Their emplacement is intimately linked to a crustal parent magma (metagrauwackes and metabsalt-tonalites) that imbibed through the openings in the post-orogenic pan-African lithospheric constraints. Their La/Yb ratio, with (La/Sm)n ranging from 2.18-5.75 ppm, reflects their richness in LREE, and the average Eu/Eu*=0.666 ppm suggests that the residual magma was supersaturated with silica.

Article Details

Petrogenesis of metaluminous and peraluminous granitoids from Garga-Sarali zone : evidence of I- and S-type sources (central African fold belt in Cameroon)

Authors:

Daama Isaac | Mbowou Gbambie Isaac Bertrand | Nguihdama Dagwaï | Ngounouno Ismaïla

Publisher:

Science Publishing Corporation

Journal:

International Journal of Advanced Geosciences Vol.12 Issue 1, pp.47-55

Document Type:

Article

Publication Date:

4/2024

Document Language:

English

Document ID (Org No.):

2001386766

pISSN:

2311-7044

DOI:

10.14419/gd4zjr47

Petrography

Petrogenesis

Granodiorites

Two-Mica Granites

Garga-Sarali.

Issues

Article Details

Petrogenesis of metaluminous and peraluminous granitoids from Garga-Sarali zone : evidence of I- and S-type sources (central African fold belt in Cameroon)

Authors: Daama Isaac | Mbowou Gbambie Isaac Bertrand | Nguihdama Dagwaï | Ngounouno Ismaïla

Publisher: Science Publishing Corporation

Journal: International Journal of Advanced Geosciences Vol.12 Issue 1, pp.47-55

Document Type: Article

Publication Date: 4/2024

Document Language: English

Document ID (Org No.): 2001386766

pISSN: 2311-7044

DOI: 10.14419/gd4zjr47

Petrography

Petrogenesis

Granodiorites

Two-Mica Granites

Garga-Sarali.

Issues

Authors:

Daama Isaac | Mbowou Gbambie Isaac Bertrand | Nguihdama Dagwaï | Ngounouno Ismaïla

Publisher:

Science Publishing Corporation

Journal:

International Journal of Advanced Geosciences Vol.12 Issue 1, pp.47-55

Document Type:

Article

Publication Date:

4/2024

Document Language:

English

Document ID (Org No.):

2001386766

pISSN:

2311-7044

DOI:

10.14419/gd4zjr47