Reply to the comment on Zafar et al., 2020: “Petrogenesis, platinum-group element geochemistry and geodynamic evolution of Cretaceous Chilas gabbros, Kohistan island arc, NE Pakistan” by Hussain et al., 2021

Zafar, Tehseen; Chen, Leng; Mahar, Munazzam Ali; Rehman, Hafiz Ur; Zhang, Xing-Chun; Chen, Wei Terry; Alam, Masroor; Rehman, Saif Ur

doi:10.1016/j.lithos.2021.106298

Cited by 2 publications

(8 citation statements)

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“…Moreover, clinopyroxenes in the Chilas gabbros, having relatively higher Al/Ti ratios also propose the presence of a hydrous source that produced Chilas gabbros. We consider that the parental magma of the Chilas gabbros most likely hydrated as a result of mantle wedge metasomatism and input of slab-derived fluids (e.g., Zafar, Leng, Mahar, et al, 2020). In conclusion, petrological and geochemical evidence from the Chilas gabbros confirms that they were developed from the active participation of water-enriched basaltic magma.…”

Section: Insights From Mineral Chemistrymentioning

confidence: 64%

“…Fresh samples, relatively low values of LOI (0.0-3.24 wt%), and positive relation of La, Ta, and Hf with Zr strongly support the insignificant influence of alteration in Chilas gabbros (Zafar, Leng, Mahar, et al, 2020), therefore can be important to examine petrogenetic traits.…”

Section: Source Lithologymentioning

confidence: 78%

“…Samples weighing between 1 and 2 kg were crushed, powdered, and fraction of the powdered samples (3-5 g) were transformed into glass discs by mixing with lithium metaborate at the ratio of 1:10. Loss-on-ignition (LOI) was evaluated by heating a separate aliquot of rock powder at around 1000 C. Major oxides of the studied rock samples were examined by XRF while trace elements were determined by ICP-MS using the analytical procedures reported in Zafar, Leng, Mahar, et al (2020). The analytical accuracy for all the measured elements of Chilas gabbros is better than 5%.…”

Section: Techniques For Mineral Compositions and Bulk-rock Geochemica...mentioning

confidence: 99%

“…The results of major and trace elements contents of Chilas gabbros are reproduced from Zafar, Leng, Mahar, et al (2020) and are presented in Tables S9 and 10, respectively. Gabbros display low values of loss on ignition (LOI) ranging from 0.0 to 3.24 wt.%.…”

Section: Bulk-rock Geochemistrymentioning

confidence: 99%

“…Therefore, we opine that the underplating of mantle-derived magmas can be one of the prime causes of crustal growth. Several studies reported the occurrence of extensive mafic magmatism in Chilas (Zafar, Leng, Mahar, et al, 2020 2020), Lee et al (2012), and Mo et al (2007. The Talkeetna lower crust and the Hacker bulk, lower crusts are after Hacker et al (2015) while the Rudnick and Gao's bulk, lower crusts are from Rudnick and Gao (2014).…”

Section: Implications For Crustal Growthmentioning

confidence: 99%

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Petrogenetic, geochemical, and geochronological constraints on magmatic evolution of the Chilas Complex gabbros, Kohistan arc, NW Himalaya

et al. 2022

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The Kohistan Arc preserves an exquisite and ideal petrogenetic record for studying mafic magmatism in an arc environment. Here we report the geochronological, mineralogical, and geochemical data of the gabbros from the Chilas Complex of Kohistan in order to understand their genesis, timing, role in crustal thickening, and tectonic evolution in Neo‐Tethys. The mineral composition of orthopyroxene (Opx) in gabbros displays transitional to metamorphic behaviour with high amount of Al2O3 (0.59–2.66 wt.%), suggesting the influence of subsolidus re‐equilibration during cooling or magmatic crystallization. Thermobarometric constraints propose the crystallization of Chilas gabbros around 892–985°C and ≤1.5 GPa pressure coupled with high H2O content (5.6%–7.7%). Geochemical modelling and isotopic peculiarities such as (87Sr/86Sr)i (0.000018–0.704140) and 206Pb/204Pb (18.526–18.554) suggest that the source of gabbros was depleted, likely controlled by peridotite melts and experienced insignificant crustal contamination. Relatively lower ratios of Nb/Yb (0.89–3.32) and TiO2/Yb (0.14–0.79) imply that the garnet was not a residual phase during the partial melting of a mantle source. The Chilas gabbros with depletion in Nb and Ta, enrichment in light rare earth element (LREE)s, the lower Ce/Pb ratios, plot of Th/La versus Th, and negative anomalies of Eu provide a consistent clue regarding the negligible participation of recycled components. Zircon U–Pb concordant ages of 83–86 Ma indicate the timing of emplacement and a Cretaceous magmatic event in the Chilas Complex. We infer that the Cretaceous magmatic flare‐up is a significant crustal growth event of Kohistan and consider the underplating of mantle‐derived magmas as one of the primary reasons for the crustal thickening based on zircon Hf isotopic signatures. The average chemical composition of Kohistan Complex provides support for the generation of andesitic magmas in arcs and the “andesite model” of continental crustal growth. We propose the similar petrogenesis for the Nidar, Kargil, and Chilas gabbros linking the formation of these variants within Neo‐Tethys based on identical magmatic records.

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Section: Insights From Mineral Chemistrymentioning

confidence: 64%

Section: Source Lithologymentioning

confidence: 78%

Section: Techniques For Mineral Compositions and Bulk-rock Geochemica...mentioning

confidence: 99%

Section: Bulk-rock Geochemistrymentioning

confidence: 99%

Section: Implications For Crustal Growthmentioning

confidence: 99%

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Petrogenetic, geochemical, and geochronological constraints on magmatic evolution of the Chilas Complex gabbros, Kohistan arc, NW Himalaya

et al. 2022

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Current state of endovascular repair of thoracoabdominal aortic aneurysms

Rodrigues,

Lima,

DeMartino

et al. 2024

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Thoracoabdominal aortic aneurysm (TAAA) is a severe and complex condition with multifactorial etiology that can lead to life-threatening complications. Its treatment is genuinely complex irrespective of the chosen technique, open or endovascular repair. Fenestrated-branched endovascular aneurysm repair (F/B-EVAR) has been increasingly accepted in patients with suitable anatomy, resulting in outcomes compared to or superior to open repair. The selection of patients, judicious surgical planning, and device selection are paramount to achieving successful treatment. The field of TAAA repair is continuously evolving with ongoing research and the development of new techniques and devices to further improve patient outcomes. This paper aims to present a review of endovascular TAAA treatment, summarizing anatomical and clinical features relevant to technical performance and treatment indications.

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Reply to the comment on Zafar et al., 2020: “Petrogenesis, platinum-group element geochemistry and geodynamic evolution of Cretaceous Chilas gabbros, Kohistan island arc, NE Pakistan” by Hussain et al., 2021

Cited by 2 publications

References 36 publications

Petrogenetic, geochemical, and geochronological constraints on magmatic evolution of the Chilas Complex gabbros, Kohistan arc, NW Himalaya

Petrogenetic, geochemical, and geochronological constraints on magmatic evolution of the Chilas Complex gabbros, Kohistan arc, NW Himalaya

Current state of endovascular repair of thoracoabdominal aortic aneurysms

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