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The~1.4 GaA-type granitoids in the“Chottanagpur crustal block”(India),and its relocation from Columbia to Rodinia?

Geoscience Frontiers 2022年第2期13卷 405-429页

作者： Nicole Sequeira Abhijit Bhattacharya elizabeth bell Department of Geology and Geophysics Indian Institute of TechnologyKharagpur 721302India Department of Earth Planetary and Space SciencesUniversity of California595 Charles Young Drive EastLos AngelesCA 90095-1567USA School of Earth Ocean and Atmospheric SciencesGoa UniversityTaleigaoGoa 403516India

In paleogeographic reconstructions of the Columbia and Rodinia Supercontinents,the position of the Greater India landmass is ***,coupled with a limited understanding of the tectonic evolution of the mobile belts along which the mosaic of crustal domains in India accreted,impedes precise correlation among the dispersed crustal fragments in supercontinent *** structural,metamorphic phase equilibria,chronological and geochemical investigations,this study aims to reconstruct the tectonic evolution of the Chottanagpur Gneiss Complex(CGC)as a distinct crustal block at the eastern end of the Greater Indian Proterozoic Fold Belt(GIPFOB)along which the North India Block(NIB)and the South India Block(SIB)*** study focuses on two issues,*** the Early Neoproterozoic(0.92 Ga)accretion of the CGC with the NIB contemporaneous with the assembly of Rodinia,and documenting the widespread(>24,000 km^(2))plutonism of1.5-1.4 Ga weakly peraluminous,calc-alkalic to alkali-calcic and ferroan A-type granitoids(±garnet)devoid of mafic microgrannular enclaves and coeval mafic emplacements in the crustal *** dominantly within-plate granitoids arguably formed by asthenospheric upwelling induced partial melting of garnetbearing anatectic quartzofeldspathic gneisses that dominate the Early Mesoproterozoic basement of the *** major and trace element chemistry of the granitoids is similar to the 1.35-1.45 Ga A-type granitoids in Laurentia/Amazonia emplaced contemporaneous with the 1.5-1.3 Ga breakup of the Columbia *** study suggests the Chottanagpur Gneiss Complex occured as a fragmented crustal block following the breakup of the Columbia Supercontinent;the crustal block was subsequently integrated within India during the Early Neoproterozoic oblique accretion between the NIB and SIB contemporaneous with the Rodinia Supercontinent assembly.

关键词： Chottanagpur Gneiss Complex Rodinia accretion Columbia Supercontinent break up Mid-Mesoproterozoic ferroan A-type granitoids

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Free tissue reconstruction of the anterior skull base:A review

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World Journal of Otorhinolaryngology-Head and Neck Surgery 2020年第2期6卷 132-136页

作者： elizabeth Bradford bell Erin R.Cohen Zoukaa Sargi Jason Leibowitz Department of Otolaryngology University of Miami Miller School of MedicineMiamiFLUSA

Objective:There has been a significant shift from open craniofacial resection of the anterior skull base to endoscopic approaches that accomplish the same outcomes in tumor ***,when open resection is required,free flap reconstruction is often necessary to provide sufficient well-vascularized tissue for optimal wound healing as well as providing adequate tissue bulk for *** articleaims to providea focused review of free flaps most commonly used in anterior skull base ***:This is a state-of-the-art review based on expert opinion and previously published reviews and journal articles,queried using PubMed and Google ***&conclusion:Anterior skull base reconstruction via free tissue transfer is imperative in limiting complications and promoting healing,particularly with large defects,post-radiation,and in at-risk *** type of free flap utilized for a particular anterior skull base reconstruction should be tailored to the patient and nature of the *** review offers insight into the numerous reconstructive options for the free flap surgeon.

关键词： Free tissue transfer Anterior skull base Head and neck microvascular Reconstruction

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照明小史

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英语学习 2010年第10期 66-68页

作者： elizabeth Royte 杨恬林（选注）

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