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Gharyan volcanic province

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Journal Article
Published: 01 October 2023
Italian Journal of Geosciences (2023) 142 (3): 449–473.
...Abdelmoniem Masoud; Abdelsalam Elshaafi; Özgür Karaoğlu; Alsedik Abousif; Michele Lustrino ABSTRACT The Cenozoic Gharyan Volcanic Province (GVP) represents one of the four major igneous districts of Libya, spreading over an area of ~4,500 km 2 . Despite the location of GVP close to major population...
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- a) Geological map of Jabal Nafusah shows the <span class="search-highlight">Gharyan</span> <span class="search-highlight">Volcanic</span> <span class="search-highlight">Province</span>, N...
Published: 01 October 2023
Fig. 2 - a) Geological map of Jabal Nafusah shows the Gharyan Volcanic Province, NW Tripoli and the main geological units of the Gharyan region (Jeffara Plain and Jabal Nafusah escarpment; modified after Goudarzi, 1980 ). b) Geological map of Gharyan Volcanic Province showing the location
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- Nb&#x2F;La vs. La&#x2F;Yb diagram for basalts from the <span class="search-highlight">Gharyan</span> <span class="search-highlight">Volcanic</span> <span class="search-highlight">Province</span> fo...
Published: 01 October 2023
Fig. 16 - Nb/La vs. La/Yb diagram for basalts from the Gharyan Volcanic Province for the present study and previous works. The field of HIUM-OIB and the dashed lines separating the fields are from Abdel-Rahman ( 2002 ). Average OIB and average lower crust (green stars) ( Chen and Arculus, 1995 ).
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- Primitive mantle-normalised incompatible element patterns (normalising fa...
Published: 01 October 2023
Fig. 10 - Primitive mantle-normalised incompatible element patterns (normalising factors after Lyubetskaya & Korenaga, 2007 ) for the Gharyan Volcanic Province late-stage basaltic rocks (a) and plateau basaltic rocks (b). CI chondrite-normalised REE patterns (normalising factors after King
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- Simplified geological map showing the distribution of the four main volca...
Published: 01 October 2023
Fig. 1 - Simplified geological map showing the distribution of the four main volcanic provinces in Libya and the tectonic framework of the Sirt Basin. GVP = Gharyan Volcanic Province; HVP = Al Hasawinah Volcanic Province; SVP = As Sawda Volcanic Province; AHVP = Al Haruj Volcanic Province; NVP
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- Rb/Sr vs. Ba/Rb variation diagram for basalts of this study and previous ...
Published: 01 October 2023
Fig. 15 - Rb/Sr vs. Ba/Rb variation diagram for basalts of this study and previous studies for comparison from the Gharyan Volcanic Province.
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- Comparison of new  40 Ar/ 39 Ar ages [relative to the optimisation model ...
Published: 01 October 2023
Fig. 12 - Comparison of new 40 Ar/ 39 Ar ages [relative to the optimisation model of Renne et al. (2010 , 2011) ] with existing K/Ar ages of the Gharyan Volcanic Province ( Piccoli, 1971 ; Schultz and Soffel, 1973 ).
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- a) La/Y vs. La. b) La vs. Ba ( Lustrino et al., 2012 ). c) Dy/Yb vs. La/Y...
Published: 01 October 2023
Fig. 14 - a) La/Y vs. La. b) La vs. Ba ( Lustrino et al., 2012 ). c) Dy/Yb vs. La/Yb ( Thirlwall et al., 1994 ; Bogaard et al., 2003) for basalts of this study and previous studies from the Gharyan volcanic province (after Jung and Masberg, 1998 ).
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-  143 Nd&#x2F; 144 Nd vs.  87 Sr&#x2F; 86 Sr composition of the <span class="search-highlight">Gharyan</span> <span class="search-highlight">Volcanic</span> Pro...
Published: 01 October 2023
Fig. 11 - 143 Nd/ 144 Nd vs. 87 Sr/ 86 Sr composition of the Gharyan Volcanic Province rocks and mantle xenoliths. Published data are from Beccaluva et al. (2008 ; basaltic rocks, yellow circles, and xenoliths, black triangles) and Lustrino et al. (2012 ; light blue), and mantle end-member
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- Photomicrographs under crossed polarised light of <span class="search-highlight">Gharyan</span> <span class="search-highlight">Volcanic</span> Provin...
Published: 01 October 2023
Fig. 3 - Photomicrographs under crossed polarised light of Gharyan Volcanic Province plateau basaltic rocks. (a) Glomerule made up of subhedral resorbed olivine (Ol), plagioclase (Pl) and clinopyroxene (Px; basalt G8B). (b) Large euhedral iddinsitised olivine phenocrysts (≥0.5 mm; basalt G9). (c
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- Photomicrographs under crossed polarised light of <span class="search-highlight">Gharyan</span> <span class="search-highlight">Volcanic</span> Provin...
Published: 01 October 2023
Fig. 4 - Photomicrographs under crossed polarised light of Gharyan Volcanic Province late-stage basaltic rocks. (a) Glomerule composed of large resorbed plagioclase (Pl), clinopyroxene (Px), and olivine (Ol; micro-monzoniteG10B). (b) Euhedral olivine phenocrysts set in a hypohyaline groundmass
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- a) Bulk mixing calculations illustrating the possible effect on Sr and Nd...
Published: 01 October 2023
Fig. 13 - a) Bulk mixing calculations illustrating the possible effect on Sr and Nd isotopic composition of basaltic rocks from the Gharyan volcanic province. The basaltic magma end-members are alkali basalt LY2A which has 87 Sr/ 86 Sr = 0.70336, 143 Nd/ 144 Nd = 0.51285, Sr = 531 ppm, Nd
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- Harker diagrams of selected trace elementsvs.SiO 2  for the <span class="search-highlight">Gharyan</span> and o...
Published: 01 October 2023
Fig. 8 - Harker diagrams of selected trace elementsvs.SiO 2 for the Gharyan and other Libyan volcanic provinces. Symbols and references as reported in Fig. 6 caption.
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- Selected trace element variation vs. La for the <span class="search-highlight">Gharyan</span> and other Libyan ...
Published: 01 October 2023
Fig. 9 - Selected trace element variation vs. La for the Gharyan and other Libyan volcanic provinces. Symbols and references as reported in Fig. 6 caption.
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- Total alkali vs. SiO 2  for the <span class="search-highlight">Gharyan</span> and other Libyan <span class="search-highlight">volcanic</span> <span class="search-highlight">provinc</span>...
Published: 01 October 2023
Fig. 6 - Total alkali vs. SiO 2 for the Gharyan and other Libyan volcanic provinces plotted for comparison (Le Maitre, 2002). Red circles: plateau basalt flows; blue circles: late-stage basalt flows investigated in the present study while yellow circles are literature analyses from Piccoli, 1970
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- Harker diagrams of selected major oxidesvs. SiO 2  for the <span class="search-highlight">Gharyan</span> and ot...
Published: 01 October 2023
Fig. 7 - Harker diagrams of selected major oxidesvs. SiO 2 for the Gharyan and other Libyan volcanic provinces. Red circles: plateau basalts; blue circles: late-stage basalts. The arrows show the approximate effect of the removal of minerals from melts: olivine (green), clinopyroxene (red
Journal Article
Published: 16 May 2019
The Canadian Mineralogist (2019) 57 (3): 339–361.
... of the Gharyan volcanic field, Libya . Lithos 155 , 218 – 235 . Macdonald, R., Karup-Møller, S., & Rose-Hansen, J. (2007) Astrophyllite-group minerals from...
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Journal Article
Published: 01 February 2014
American Mineralogist (2014) 99 (2-3): 267–275.
... settings, even if there is a variation in bulk chemistry, whereas spinels with similar bulk chemistry but belonging to different geological environments exhibit a wide range of u values. The Middle Atlas basaltic province comprises the largest and youngest volcanic fields in Morocco. A hundred well...
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Series: Geological Society, London, Special Publications
Published: 01 January 2008
DOI: 10.1144/SP293.12
EISBN: 9781862395411
... the main depletion melting events to pre-Palaeozoic times. Fig. 8. Sr–Nd–Pb isotopic variations for clinopyroxene separates from the Gharyan mantle xenoliths, compared with those from Hoggar ( Beccaluva et al . 2006 a , b ) and the Veneto Volcanic Province (VVP, Beccaluva et al . 2007 ). Also...
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Journal Article
Published: 25 April 2018
Journal of the Geological Society (2018) 175 (4): 627–641.
...) and plagioclase (plag). Peridotite and pyroxenite partial melt fields after Herzberg & Asimow (2008) . Scientific editing by Sebastian Watt References Bardintzeff , J.M. , Bonin , B. & Rasamimanana , G. 2001 . The Cretaceous Morondava volcanic province (West Madagascar...
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