Petrogenesis of the Alaskan-type mafic–ultramafic complex in the Makkah quadrangle, western Arabian Shield, Saudi Arabia

Habtoor, Abdelmonem M.; Ahmed, Ahmed H.; Harbi, Hussein M.

doi:10.1016/j.lithos.2016.08.014

Cited by 33 publications

(21 citation statements)

References 70 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Alpine‐type ultramafic–mafic intrusions and ophiolites in orogenic belts preserve geochemical signatures of (a) depleted, MOR‐type mantle that experienced several melt extraction events, (b) melt migration and refertilization, and (c) subduction‐derived metasomatic imprints collectively suggesting evolution of oceanic lithosphere in suprasubduction zone environment and subduction–accretion processes during ocean basin closure (Saha et al, ; Seyler, Lorand, Toplis, & Godard, ; Uysal et al, ). Alaskan‐type ultramafic–mafic intrusions originate from subduction‐processed arc magmas and are emplaced in island arc or active continental margins settings and represent uplifted fragments of concentrically zoned roots of island and continental arcs comprising an ultramafic core and more evolved mafic shells (Abdallah, Ali, & Obeid, ; Dong et al, ; Eyuboglu et al, ; Habtoor, Ahmed, & Harbi, ; Tseng et al, ; L. Yuan, Zhang, Yang, Lu, & Chen, ). The evidence of pronounced serpentinization in the studied ultramafic rocks suggests hydrous alteration.…”

Section: Discussionmentioning

confidence: 99%

“…They show both positive and negative εHf(t) values from −3.9 to 1.5 when calculated by the 207 Pb/ 206 Pb age from 2,643 to 2,980 Ma, and the Hf-depleted model ages (T DM ) are in the range of 3,041-3,366 Ma (Table 2). comprising an ultramafic core and more evolved mafic shells (Abdallah, Ali, & Obeid, 2018;Dong et al, 2017;Eyuboglu et al, 2010;Habtoor, Ahmed, & Harbi, 2016;Tseng et al, 2009;L. Yuan, Zhang, Yang, Lu, & Chen, 2017) The ultramafic rocks considered as depleted residues of mantle melting are characterized by chondrite-normalized REE patterns with prominent LREE depletion and flat or enriched HREE (Chen et al, 2015).…”

Section: Zircon Lu-hf Isotopesmentioning

confidence: 99%

See 1 more Smart Citation

Evolution of a Mesoarchean suprasubduction zone mantle wedge in the Dharwar Craton, southern India: Evidence from petrology, geochemistry, zircon U–Pb geochronology, and Lu–Hf isotopes

et al. 2019

View full text Add to dashboard Cite

Petrological, geochemical, and zircon U–Pb geochronological features of Archean ultramafic–mafic complexes formed in subduction‐related settings provide significant insights into mantle source and geodynamic processes associated with subduction–accretion‐collision events in the early Earth. Here, we investigate a suite of serpentinized dunite, dunite, pyroxenite, and clinopyroxenite from an ultramafic complex along the collisional suture between the Western Dharwar Craton (WDC) and the Central Dharwar Craton (CDC) in southern India. We present petrology, mineral chemistry, zircon U–Pb geochronology, rare earth element (REE), Lu–Hf isotopes, and whole‐rock geochemistry including major, trace element, and platinum‐group element (PGE) data with a view to investigate the magmatic and metasomatic processes in the subduction zone. Mineral chemistry data from chromite associated with the serpentinised ultramafic rocks show distinct characteristics of arc‐related melt. Zircon U–Pb data from the ultramafic suite define different age populations, with the oldest ages at 2.9 Ga, and the dominant age population showing a range of 2.8–2.6 Ga. The early Paleoproterozoic (ca. 2.4 Ga) metamorphic age is considered to mark the timing of collision of the two WDC and CDC. Zircon REE patterns suggest the involvement continental crust components in the magma source. Zircon Lu–Hf analysis yields both positive and negative εHf(t) values from −3.9 to 1.5 with Hf‐depleted model ages (TDM) of 3,041–3,366 Ma for serpentinised dunite and −0.2–2.0 and 2,833–2,995 Ma for pyroxenite, suggesting that the magma was sourced from depleted mantle and was contaminated with the ancient continental crust. Geochemical data show low MgO/SiO2 values and elevated Al2O3/TiO2 ratios, implying subduction‐related setting. The serpentinized dunites and dunites show mild LREE enrichment over HREE, with relatively higher abundance of LILE (Ba, Sr) and depletion in HFSE (Nb, Zr), suggesting fluid–rock interaction, melt impregnation, and refertilization processes. The PGE data suggest olivine, chromite, and sulphide fractionations associated with subduction processes. Our study on the Mesoarchean to Neoarchean ultramafic complex provides important insights to reconstruct the history of the crust–mantle interaction in an Archean suprasubduction zone mantle wedge.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Zircon Lu-hf Isotopesmentioning

confidence: 99%

Evolution of a Mesoarchean suprasubduction zone mantle wedge in the Dharwar Craton, southern India: Evidence from petrology, geochemistry, zircon U–Pb geochronology, and Lu–Hf isotopes

et al. 2019

View full text Add to dashboard Cite

show abstract

“…The Alaskan type of plutonic complexes represents arc magma chambers (Irvine, 1974;Taylor, 1967) or arc-root complexes (De Bari & Coleman, 1989). Chrome spinel is an accessory mineral in dunite and wehrlites, and these complexes also have the spinels of higher Fe 3+ and Ti contents coupled with low Al contents when compared with spinels from oceanic or continental rift domains (Himmelberg & Loney, 1995;Habtoor, Ahmed, & Harbi, 2016). The dunites and peridotites of SMUC carry chrome spinels occurring along the grain boundaries of olivine and pyroxenes.…”

Section: Spinelmentioning

confidence: 99%

The mafic–ultramafic complex of Salem, southern India: An analogue for Neoproterozoic Alaskan‐type complex

2019

View full text Add to dashboard Cite

The Salem Mafic–Ultramafic Complex occurs within the northern part of Cauvery Suture Zone (CSZ), Southern Granulite Terrane (SGT), India. The complex occurs as semicircular to elongated linear body with a thick mantle section and comparatively well‐developed crustal section comprising different lithological units, also referred to as the Chalk Hills of Salem. The major rock types in the complex comprise ultramafic cumulates of dunite, peridotite, wherlite, pyroxenite, and hornblendite, mafic and felsic intrusions of gabbros and amphibolites, and quartzo–feldspathic alkaline rocks together with several ultrapotassic dykes. Geochemical studies of amphibolites from this complex indicate tholeiitic parent magma with enrichment of LIL elements (Rb, Ba, Th, and Sr) and are relatively more enriched than N‐MORB as compared with arc‐related rocks. The enrichment of LIL elements over the HFS elements and with distinct Nb, Ta, and Ti depletion relative to other HFS elements suggest the involvement of subduction‐related components in the depleted mantle source and that the magmatism occurred in an oceanic convergent realm. The mineral chemistry of dunite and peridotite shows high content of forsterite (86.9–92.2) in olivine and high Cr# value (80.85–98.73) for spinel. The tectonic discrimination plots of spinel and olivine mineral chemistry together with clinopyroxene chemistry of amphibolites reveal arc signature typical of Alaskan type of complex. The U–Pb zircon analysis of quartz monzonite intrusion within the hornblendite from the complex yielded a weighted mean age of 819 ± 2.4 Ma, suggesting that the complex formed during the Neoproterozoic and can be correlated to the Alaskan‐type complexes described from the Arabian–Nubian Shield.

show abstract

“…Further, the plot between Cr ratio and TiO 2 of the analysed Cr-spinel plots in the field of Alaskan-type intrusion (Figure 9a). (Dick & Bullen, 1984) and fore arc (Ishii, Robinson, Maekawa, & Fiske, 1992) peridotites, MORB, boninites, (Arai, 1992;Barnes & Roeder, 2001), Aleutian xenoliths (Debari, Kay, & Kay, 1987) and Alaskan-type ultramafic intrusions (Himmelberg & Loney, 1995) Table 7 and is also compared with parental melt composition estimates from different tectonic settings, namely, Taftafan Alaskan-type complex of western Arabian Shield (Habtoor et al, 2016), layered intrusions of Bushveld Complex (Mondal, Ripley, Li, & Frei, 2006), average BABB magma (Kamenetsky et al, 2001;Pearce, Barker, Edwards, Parkinson, & Leat, 2000), average worldwide boninites, and MORB magmas (Wilson, 1989). Using regression analyses, the estimated melt composition is compared with the melt composition from other tectonic settings.…”

Section: Petrogenesismentioning

confidence: 99%

“…The bivariant plots of oxygen fugacity against Cr# of spinel distinguishes the oxidation state for the ultramafic rocks crystallized from different tectonic settings (Ballhaus et al, 1991;Dare et al, 2009;Elburg & Kamenetsky, 2007;Habtoor et al, 2016). Cr-spinels in peridotites from arc magma are more oxidized than those from MORB magmas.…”

Section: Petrogenesismentioning

confidence: 99%

Chromian spinel compositions from Madawara ultramafics, Bundelkhand Craton: Implications on petrogenesis and tectonic evolution of the southern part of Bundelkhand Craton, Central India

et al. 2018

View full text Add to dashboard Cite

Madawara ultramafic complex (MUC) in the southern part of Bundelkhand Craton, Central India comprises peridotite, olivine pyroxenite, pyroxenite, gabbro, and diorite. Coarse‐grained olivine, clinopyroxene (Cpx), amphibole (Amp), Al‐chromite, Fe‐chromite, and magnetite with rare orthopyroxene (Opx) are common minerals in peridotite. Chromites are usually coarse‐grained euhedral found as disseminated crystals in the olivine matrix showing both homogeneous and zoned texture. Al‐chromite, primarily characterizes Cr‐spinels and its subsequent fluid activity and alteration can result in the formation of Fe‐chromite, chrome magnetite, and magnetite. Mineral chemistry data suggest that Al‐chromite is characterized by moderately high Cr2O3 (38.16–51.52 wt.%) and Fe2O3 (3.22–14.51 wt.%) and low Al2O3 (10.63–21.87 wt.%), MgO (1.71–4.92 wt.%), and TiO2 (0.22–0.67 wt.%), whereas the homogeneous Fe‐chromite type is characterized by high Fe2O3 (25.54–47.60 wt.%), moderately low Cr2O3 (19.56–37.90 wt.%), and very low Al2O3 (0.06–1.53 wt.%). Subsequent alteration of Al‐chromite and Fe‐chromite leads to formation of Cr‐magnetite and magnetite. The Cr# of Al‐chromite varies from 55.12 to 76.48 and γFe3+# from 8 to 19, whereas the ferrian chromite has high Cr# varying from 94.27 to 99.53 while its γFe3+# varies from 38 to 70. As a whole, the primary Al‐chromite shows low Al2O3, TiO2 contents, and high Fe#, Cr# values. Olivines have forsterite ranging from 75.96% to 77.59%. The bulk‐rock geochemistry shows continental arc geochemical affinities indicated by the high concentration of large‐ion lithophile elements and U, Th relative to the low concentration of high‐field strength elements. These petrological and mineralogical as well as primary Al‐chromite compositions plotted in different discrimination diagrams suggest an arc environment that is similar to Alaskan‐type intrusion.

show abstract

Petrogenesis of the Alaskan-type mafic–ultramafic complex in the Makkah quadrangle, western Arabian Shield, Saudi Arabia

Cited by 33 publications

References 70 publications

Evolution of a Mesoarchean suprasubduction zone mantle wedge in the Dharwar Craton, southern India: Evidence from petrology, geochemistry, zircon U–Pb geochronology, and Lu–Hf isotopes

Evolution of a Mesoarchean suprasubduction zone mantle wedge in the Dharwar Craton, southern India: Evidence from petrology, geochemistry, zircon U–Pb geochronology, and Lu–Hf isotopes

The mafic–ultramafic complex of Salem, southern India: An analogue for Neoproterozoic Alaskan‐type complex

Chromian spinel compositions from Madawara ultramafics, Bundelkhand Craton: Implications on petrogenesis and tectonic evolution of the southern part of Bundelkhand Craton, Central India

Contact Info

Product

Resources

About