Gondwana Research
Papers 3426
1 page of 343 pages (3,426 results)
#1Youngbeom CheonH-Index: 5
#2Sangmin HaH-Index: 2
Last. Moon SonH-Index: 13
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Abstract The Gyeongsang Basin, the largest Cretaceous nonmarine sedimentary basin in Korea, formed as a continental back-arc basin related to NNW-directed subduction of the (proto-) Pacific Plate underneath the Eurasia Plate. The basin can be divided into an earlier-formed western back-arc depression and a later-formed eastern volcanic arc platform. We investigated the basin evolution and the associated tectonic settings, largely based on an analysis of structures individuated in the field in th...
Abstract The continental craton is generally considered to be stable, due to its low-density and high viscosity; however, the thinning and destruction of cratonic lithosphere have been observed at various parts of the globe, for example, the eastern North China Craton (NCC). Although a large number of geological and geophysical data have been collected to study the NCC, the mechanisms and dynamic processes are still widely debated. In this study, using 2-D high-resolution thermo-mechanical model...
#1Xing JianH-Index: 6
#2Amy L. WeislogelH-Index: 13
Last. Fei Shang
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Abstract The Eastern Kunlun Range, as a high-elevation and granitoid-rich tectonic element in northern Tibet, records Paleozoic–Mesozoic amalgamation process of the East Asia continent and Cenozoic uplift of the Tibetan Plateau. However, Precambrian evolution of the Eastern Kunlun remains poorly understood and relations between Eastern Kunlun and adjacent terranes (e.g., Qaidam and Qilian) during the Phanerozoic accretion process are still highly controversial. We use detrital zircon U-Pb geochr...
#1Huining Wang (Ontario Ministry of Natural Resources)H-Index: 1
#2Fulai Liu (Ontario Ministry of Natural Resources)H-Index: 3
Last. Fang Wang (Ontario Ministry of Natural Resources)H-Index: 16
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Abstract Subduction erosion along active convergent plate margins involves arc subduction, tectonic erosion and sediment subduction. Here we investigate the metasedimentary rocks enclosing blueschists and eclogites in the Changning–Menglian orogenic belt (CMOB) of the southeastern Tibetan Plateau which marks the main suture associated with the closure of the Paleo-Tethyan Ocean between the Baoshan–Tengchong and Lanping–Simao blocks. We present an integrated study of petrology, mineral chemistry,...
#1Yanning Wang (China University of Geosciences)H-Index: 1
Last. Edward M. RipleyH-Index: 43
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Abstract The North Qiangtang continental block in central Tibet is a critical piece of the Pangea puzzle. This paper uses integrated geochronological and geochemical data for selected mafic dykes and dioritic enclaves in this block to evaluate its tectonic evolution in the Triassic. Zircons from two mafic dykes and the dioritic enclaves of a large arc granodiorite pluton in eastern North Qiangtang yield indistinguishable U-Pb ages from 248 ± 2 to 251 ± 3 Ma, contemporaneous with widespread arc b...
#1Shuai Han (PKU: Peking University)
#2Haibing Li (Ontario Ministry of Natural Resources)H-Index: 1
Last. Jinjiang Zhang (PKU: Peking University)H-Index: 17
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Abstract The complex evolutionary history of collision-related suture zones in the western Qiangtang is poorly understood, due to the lack of pivotal magmatic and tectonic records. The Chem Co intermediate-felsic batholith is situated in the westernmost section of Qiangtang, where it intruded into the Upper Paleozoic metamorphic sedimentary series and was cut by Late-Cenozoic active normal faults. Here, we present evidence from field observations, geochemistry, zircon U Pb and Hf isotopes, and m...
#1Silvia Danise (Plymouth University)
#1Silvia Danise (UniFI: University of Florence)H-Index: 11
Last. Steven M. Holland (UGA: University of Georgia)H-Index: 28
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Abstract We report stable isotope ratios (δ13C, δ18O), minor and trace elements (Mn, Fe, Sr, Mg) together with Ca concentrations from bivalve shells and belemnites from the Middle-Upper Jurassic Sundance Seaway (western United States), we compare them with coeval open-ocean Tethyan data, and reconstruct the palaeo-circulation of seaway waters. The Sundance Seaway was a 2000 km long epicontinental sea with a single entrance at mid latitudes (55–60°N), which would have fostered substantial evoluti...
#1Anthony I.S. Kemp (UWA: University of Western Australia)H-Index: 27
#2P.L. Blevin (Department of Planning and Environment)H-Index: 1
Last. M.D. Norman (ANU: Australian National University)
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Abstract New SIMS U-Pb (zircon) data for intrusive rocks of the Macquarie Arc and adjacent granitic batholiths of the Lachlan Orogen (southeastern Australia) provide insight into the magmatic and tectonic evolution of the paleo-Pacific Gondwana margin in the early Paleozoic. These data are augmented by Re-Os dates on molybdenite from four Cu-Au mineralised porphyry systems to place minimum age constraints on igneous crystallization. The simplicity of the zircon age distributions, and absence of ...
#1Lida Xing (China University of Geosciences)H-Index: 19
#2Pierre F.D. Cockx (University of Regina)H-Index: 3
Last. Ryan C. McKellar (KU: University of Kansas)H-Index: 13
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Abstract Even in the absence of associated skeletal material, isolated feathers in amber remain of high scientific interest. The remarkable preservation of these delicate structures in amber, implies a potential for significantly improving our knowledge of feather evolution and diversity. A large sample set of 150 Burmese amber specimens (Upper Cretaceous, ~99 Ma) containing feathers is herein described. Several structural types can be differentiated including flight feathers, contour feathers, ...
1 CitationsSource
#1Linda M. Iaccheri (UWA: University of Western Australia)H-Index: 3
#2Leon Bagas (UWA: University of Western Australia)H-Index: 22
Abstract Paleoproterozoic orogens of the North Australian Craton are related to the assembly of the Columbia Supercontinent. The roles of the distinct orogens in the Paleoproterozoic craton amalgamation are poorly understood due to the lack of surface exposure. The age and isotopic systematics of detrital zircon grains hosted in Paleoproterozoic sedimentary sequences are used to unravel the geological history of the craton, in terms of paleogeography and tectonic setting. The oldest (Early Paleo...
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