Gondwana Research
Papers 3438
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#1Dominik SorgerH-Index: 1
Last. Manfred LinnerH-Index: 1
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Abstract Garnets in metapelitic paragneisses from the southern Drosendorf unit in the Austrian part of the Bohemian Massif exhibit two episodes of growth during the Variscan orogeny, which can be distinguished on textural and chemical grounds. The first garnet (grt1) records evidence of high-grade metamorphism in the Late Devonian (Frasnian–Famennian), while the second garnet (grt2) formed by a second high-grade event in the Early Carboniferous (Visean). Both garnet generations contain abundant ...
#1Bernd LehmannH-Index: 34
#2Basem Zoheir (CAU: University of Kiel)H-Index: 14
Last. Richard J. Moscati (USGS: United States Geological Survey)H-Index: 7
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Abstract The Abu Dabbab rare-metal granite in the Eastern Desert of Egypt is a highly-evolved alkali-feldspar granite with transitional magmatic-hydrothermal features. Extreme geochemical fractionation and the associated significant Ta Sn resource make the Abu Dabbab intrusion an important feature in the metallogenic evolution of the Arabian-Nubian shield. U Pb dating by laser ablation sector field (SF)-ICPMS analysis of igneous monazite yields a Concordia age of 644.7 ± 2.3 Ma, identical within...
#1Xin‐Yu Long (JLU: Jilin University)
#2Wen-Liang Xu (JLU: Jilin University)H-Index: 30
Last. Jin-Peng Luan (JLU: Jilin University)H-Index: 3
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Abstract The tectonic evolution of the ancient Mudanjiang Ocean within the Central Asian Orogenic Belt (CAOB), is strongly debated. The ocean played an important role in the amalgamation of the Songnen and Jiamusi massifs; however, the timings of its opening and closure have remained ambiguous until now. In this study, we analyzed early Mesozoic intrusive rocks from the eastern Songnen and western Jiamusi massifs in the eastern CAOB. The new zircon U Pb ages, Hf isotope data, and whole-rock majo...
#1Florian C. Krob (Heidelberg University)H-Index: 1
#2Ulrich A. Glasmacher (Heidelberg University)H-Index: 20
Last. Peter Christian Hackspacher (UNESP: Sao Paulo State University)H-Index: 19
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Abstract Since plate tectonics has been linked to material flow in the Earth’s mantle, it is commonly accepted that convective motion in the sublithospheric mantle results in vertical deflections and horizontal plate motion on the Earth’s surface. Those mantle flow-driven vertical deflections are recognized through significant signals and traces in the sedimentary records (unconformities and missing sections). Recently, Friedrich et al. (2018) introduced an event-based plume stratigraphic framew...
#1Linqi Xia (CGS: China Geological Survey)H-Index: 7
#2Xiangmin Li (CGS: China Geological Survey)H-Index: 6
Abstract The Carboniferous–Early Permian rift-related volcanic successions, covering large areas in the Chinese Tianshan and its adjacent areas, make up an important phanerozoic large igneous province in the word, which can be further divided into two sub-provinces: Tianshan and Tarim. The Early Permian volcanic rocks have been considered to be the products of an intraplate volcanism by most researchers. However, there is still strong controversy about the nature and geological setting of the Ca...
#1Hongzhi Zhou (China University of Geosciences)H-Index: 2
#2Daohan Zhang (China University of Geosciences)H-Index: 5
Last. Xu Zhao (China University of Geosciences)H-Index: 1
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Abstract Late Triassic granitoids containing abundant mafic microgranular enclaves (MMEs) occur widely in the Eastern Kunlun Orogenic Belt (EKOB). In this work, we present mineral chemistry, zircon U-Pb ages and Lu-Hf isotopes, whole-rock chemistry and Sr-Nd isotope compositions of the MMEs and host granodiorite from the Huda pluton in the Elashan area within the easternmost domain of the EKOB. These rocks contain inherited (Meso- to Neoproterozoic) and xenocrystic (ca. 240 Ma) zircon grains tha...
#1Andrea Agangi (UJ: University of Johannesburg)H-Index: 10
#2Axel Hofmann (UJ: University of Johannesburg)H-Index: 29
Last. Sergei Svetov (RAS: Russian Academy of Sciences)
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Abstract The ca. 3.07 Ga volcanic rocks of the Dominion Group, South Africa, represent the oldest example of intracontinental, rift-related volcanism on the Archaean Kaapvaal craton. The volcanic assemblage comprises a >2 km-thick succession of mafic-intermediate lavas interlayered with felsic lavas and pyroclastic rocks. Textural and geological features indicate emplacement in a subaerial environment probably in an incipient intracontinental rift. We report SHRIMP U Pb zircon ages, elemental an...
Abstract Cenomanian/Turonian boundary (upper Sarvak Formation) benthic foraminiferal assemblages were analyzed to reconstruct oxygen level, primary productivity, and water turbulence in the Izeh Zone, Zagros Basin. The interplay between environmental perturbations during the Oceanic Anoxic Event 2 (OAE2) and regional tectonic activities in the Zagros Basin resulted in formation of various benthic foraminiferal assemblages in the study section. The OAE2 interval at the region of study starts with...
#1Yong Yi ZhenH-Index: 12
#2Yuandong Zhang (CAS: Chinese Academy of Sciences)H-Index: 13
Last. Wenjie Li (CAS: Chinese Academy of Sciences)H-Index: 2
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Abstract The Ordovician stratigraphy of southern-central Xizang (Tibet) has been revised based on new conodont data recovered from 43 samples in four stratigraphic units and their integration with existing nautiloid and graptolite data. The Histiodella holodentata and Pygodus serra biozones have been identified respectively in the Alai and Jiaqu formations of the Chiatsun Group exposed near Alai village in Nyalam County within the Himalayan terrane, and the Yangtzeplacognathus foliaceus Subbiozo...
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#1Guido Meinhold (Keele University)H-Index: 17
Last. Jasper BerndtH-Index: 28
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Abstract The closure of Palaeotethys that led to the collision of the Cimmerian blocks with the southern Eurasian margin causing the Eo-Cimmerian orogeny during the Early Mesozoic is still controversially discussed. The Triassic Nakhlak Group in Central Iran is a key sedimentary succession for better understanding the closure of Palaeotethys and the Eo-Cimmerian orogeny in the Middle East. The Nakhlak Group is composed of the Alam (Olenekian to Middle Anisian), Baqoroq (?Upper Anisian to Middle ...
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