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4篇 您的检索式:作者名="Batuk"
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1Producing 3D city model with the combined photogrammetric and laser scanner data in the example of Taksim Cumhuriyet square显示文摘Cumhur Sahin Ayhan Alkis Bahadir Ergun Sitki Kulur Fatmagul Batuk Ali Kilic 2012Optics and Lasers in Engineering2012,,12:1
2A new nicotinoyl glucoside from Cryptolepis buchanani 显示文摘Sunil K Batuk D Sharma N 1980Phytochemistry1980,19,6:1
3Characterization of partial melting events in garnet-cordierite gneiss from the Kerala Khondalite Belt,India显示文摘Phase equilibria modelling coupled with U–Pb zircon and monazite ages of garnet–cordierite gneiss from Vallikodu Kottayam in the Kerala Khondalite Belt,southern India are presented here.The results suggest that the area attained peak P–T conditions of^900C at 7.5–8 kbar,followed by decompression to 3.5–5 kbar and cooling to 450–480C,preserving signatures of the partial melting event in the field of high to ultra-high temperature metamorphism.Melt reintegration models suggest that up to 35%granitic melt could have been produced during metamorphism at^950C.The U–Pb age data from zircons(~1.0–~0.7 Ga)and chemical ages from monazites(~540 Ma and^941 Ma)reflect a complex tectonometamorphic evolution of the terrain.The^941 Ma age reported from these monazites indicate a Tonian ultra-high temperature event,linked to juvenile magmatism/deformation episodes reported from the Southern Granulite Terrane and associated fragments in Rodinia,which were subsequently overprinted by the Cambrian(~540 Ma)tectonothermal episode.Nilanjana Sorcar Kumar Batuk Joshi Elson POliveira JKTomson VNandakumar 2020Geoscience Frontiers2020,11,2:0
4From source to emplacement:The origin of leucogranites from the Sikkim-Darjeeling Himalayas,India显示文摘Himalayan leucogranites are important for understanding the tectonic evolution of collision zones in general and the causes of crustal melting in the Himalayan orogen in particular.This paper aims to understand the melt source and emplacement age of the leucogranites from Sikkim in order to decipher the deep geodynamic processes of the eastern Himalayas.Zircon U-Pb analysis of the Higher Himalayan Sequence(HHS)metamorphic core reveals a prolonged period of crustal melting between>33 Ma and ca.14 Ma.Major and trace element abundances are presented for 27 leucogranites from North Sikkim that are classified into two-mica and tourmaline leucogranite types.They are peraluminous in composition,characterized by high SiO2(70.91-74.9 wt.%),Al2O3(13.69-15.82 wt.%),and low MgO(0.13-0.74 wt.%).Elemental abundances suggest that Sikkim Himalayan leucogranites are derived from crustal melts.The two-mica leucogranites are derived from a metagreywacke source,whereas the tourmaline leucogranites are sourced from metapelitic sources,with inherited zircons indicating an HHS origin for both types.U-Pb zircon geochronology of the two mica leucogranites indicates ages of ca.19-15 Ma,consistent with crustal melting recorded in HHS gneisses from Darjeeling.Monazites from both the two-mica and tourmaline leucogranites yield a crystallization age of ca.15-14 Ma,coeval with movement on the Main Central Thrust and South Tibetan Detachment System which further provides constraints on the timing and mechanism of petrogenesis of leucogranites in the Sikkim Himalayas.Tanya Srivastava Nigel Harris Catherine Mottram Kumar Batuk Joshi Nishchal Wanjari 2024Geoscience Frontiers2024,15,1:0
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