Geochemistry and petrogenesis of a high-K calc-alkaline Dokhan Volcanic suite, South Safaga area, Egypt: the role of late Neoproterozoic crustal extension

Moghazi, A.M.

doi:10.1016/s0301-9268(03)00110-4

Cited by 140 publications

(68 citation statements)

References 65 publications

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“…Also the positive anomaly of Sr in basaltic rocks is justified by the presence in these rocks plagioclase [52]. Similar and parallel trends drawn in all spider diagrams can introduce a single source for these rocks.…”

Section: Magmatic Tectonic Patternsupporting

confidence: 70%

Petrology and Tectonic Setting of Volcanic Rocks in West and South West of Salafchegan, Qom, Iran

Taheri¹,

Ardalan²,

Emami³

et al. 2017

OJG

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In the west and south-west part of Salafchegan near Zavarian village in Iran (in central Iranian volcano plotonic belt), there are some volcanic rocks. Based on petrography and geochemistry findings, these volcanic rocks are Basalt, Andesite, Tracky-Andesite, Trackyte, Latite, Dacite. Tectono-magmatic diagram Y versus Zr shows the magmatic arc setting and Zr/TiO 2 versus Ce/P 2 O 5 diagram contrasts post colligenal magmatic arcs. The HFSE depletion in the MORB spider diagram shows significant volcanic arc magmatism. The high enrichment of Eu, Sr, Th, Rb, Cs, K (LFS elements) and Y, Zr, Hf shows negative anomaly and subduction tectonic setting. Based on MORB, Chondrite and primitive mantle spider diagrams, LREE have enriched to HREE in this area. The results of petrography, geochemistry and tectonic setting studies in this area, indicate that neogene magmatism occurred in post colligenal tectonic setting-subduction of Neo-thetise ocean under central Iranian plate in neogen era.

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Section: Magmatic Tectonic Patternsupporting

confidence: 70%

Petrology and Tectonic Setting of Volcanic Rocks in West and South West of Salafchegan, Qom, Iran

Taheri¹,

Ardalan²,

Emami³

et al. 2017

OJG

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“…The mafic volcanic RB exhibited negative Nb anomalies and positive Pb anomalies, but presented higher LILE enrichments. The negative anomalies of Ba, Sr, P, and Ti may be attributed to the fractionation of feldspar for Ba and Sr depletion, apatite for P depletion, and (Fe-Ti) oxides for Ti depletion [38]. The primitive mantle value of the rock ( Figure 12(b)) showed a positive Nb peak, which conforms to the tertiary to recent continental alkali basalt provinces [52]- [54] and indicates that the RB is the product of lithosphere from upwelling asthenospheric mantle [19] …”

Section: Discussionmentioning

confidence: 99%

“…[11] has suggested that SiO 2 under saturated magma had a high FeO content of >11 wt% and high MgO content of >7. [34] and [38] reported that rocks with high Mg# (>60) exhibit lowest contents of Nb and Zr and higher contents of Cr and Ni. All the present studies for the above mentioned, were explained to indicate that the rocks undergo smaller degree of partial melting at high pressures [39].…”

Section: Major Oxidesmentioning

confidence: 99%

Petrography, Geochemistry and Petrogensis of Basal Flow from Ar-Rabba Area, Central Jordan

Yaseen¹

2016

IJG

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“…The mafic volcanic MB exhibited negative Nb anomalies and positive Pb anomalies, but presented higher LILE enrichments. The negative anomalies of Ba, Sr, P, and Ti may be attributed to the fractionation of feldspar for Ba and Sr depletion, apatite for P depletion, and (Fe-Ti) oxides for Ti depletion [38]. The primitive mantle value of the rock [47] (Figure 8(b)) showed a positive Nb peak, which conforms to the tertiary to recent continental alkali basalt provinces [48] [49] and indicates that the MB is the Figure 7.…”

Section: Discussionmentioning

confidence: 99%

Contribution to the Petrography, Geochemistry, and Petrogenesis of Zarqa-Ma’in Pleistocene Alkali Olivine Basalt Flow of Central Jordan

Yaseen¹

2014

IJG

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The Zarqa-Ma'in basalt (MB) occurs near a plateau basalt (wadi fills) covering about 15 km 2 of Makawir, Ataruz, and Hammat um Hasana cone areas in central Jordan. The tectonic evolution occurred through intraplate volcanism and erupted through fissure systems along the Dead Sea, transforming the fault during Miocene to Pleistocene period. Three stages of eruption of MB have been recorded during Pleistocene from 6 to 0.6 Ma. The petrographic analyses data show that the MB rocks are composed of plagioclase, olivine, pyroxene, and magnetite, including secondary minerals calcite, iddingsite, serpentine, and zeolite. Furthermore, the MB rocks have narrow ranges of major and trace element concentrations, and are of under saturated silica type and belong to sodic alkaline magma series. The geochemical characteristics of MB indicate that MB was derived from a slightly fractionated magma as reflected by its high MgO (6.3 -11.7 ppm) concentration with Mg number from 0.41 to 0.61, low silica content (40.83 -47.55 wt%), and high Cr and Ni concentrations (115 -475 and 105 -553 ppm, respectively). This basalt exhibited low degree of partial melting (10%) for garnet peridotite mantle source. The model mineral fractionation showed that the MB could be fractionated to clinopyroxene, orthopyroxene, olivine, and plagioclase.

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Geochemistry and petrogenesis of a high-K calc-alkaline Dokhan Volcanic suite, South Safaga area, Egypt: the role of late Neoproterozoic crustal extension

Cited by 140 publications

References 65 publications

Petrology and Tectonic Setting of Volcanic Rocks in West and South West of Salafchegan, Qom, Iran

Petrology and Tectonic Setting of Volcanic Rocks in West and South West of Salafchegan, Qom, Iran

Petrography, Geochemistry and Petrogensis of Basal Flow from Ar-Rabba Area, Central Jordan

Contribution to the Petrography, Geochemistry, and Petrogenesis of Zarqa-Ma’in Pleistocene Alkali Olivine Basalt Flow of Central Jordan

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