Papers 5931
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#1Xing Cui (HKU: University of Hong Kong)H-Index: 1
#2Min Sun (HKU: University of Hong Kong)H-Index: 93
Last. Liming Dai (Ocean University of China)H-Index: 18
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Abstract The early to middle Paleozoic accretionary history of the Chinese Altai orogen remains controversial, especially along its southern margin facing the Paleo-Asian Ocean. This study conducts a systematic investigation on the Devonian meta-volcanic sequences from the Altay Formation in the southern Chinese Altai to constrain their petrogenesis and tectonic implications. LA-ICP-MS zircon U Pb dating for rocks from the bottom and top layers of the studied volcanic sequences indicates their e...
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#1Yong-Wei Zhao (CEA: China Earthquake Administration)H-Index: 2
#2Haibo Zou (AU: Auburn University)H-Index: 30
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Abstract We present major element, trace element and Sr-Nd-Pb-Hf isotopic compositions of the late Cenozoic basaltic rocks from Dalinor, Inner Mongolia, on the west of the Greater Hinggan Mountain Range in Northeast Asia, and discuss the origin of mantle source heterogeneity beneath Northeast Asia. The early-stage volcanoes (EV) from Dalinor produced predominantly quartz tholeiitic and olivine tholeiitic basalts whereas the late-stage volcanoes (LV) produced alkali basalts. Variations in the deg...
#1Yu-Xiang Zhu (China University of Geosciences)H-Index: 1
#2Lian-Xun Wang (China University of Geosciences)H-Index: 8
Last. Hafizullah Abba Ahmed (China University of Geosciences)H-Index: 2
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Abstract A series of magmatic syenites containing extremely high K2O contents (up to 15 wt%, mean of 12 wt%) have been identified in the Songxian region of Qinling Orogenic Belt (Central China). An integrated investigation, combining mineral composition, whole-rock elemental and Sr Nd isotopic geochemistry and zircon U Pb geochronology, was conducted to track the origin and evolution of the ultrapotassic intermediate magma. The Songxian syenites mainly consist of alkali-feldspar syenite and aegi...
#2Andrey V. BobrovH-Index: 11
Last. Tetsuo IrifuneH-Index: 44
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Abstract Phase relations in the MgSiO3–MgTiO3 and Mg3Al2Si3O12–MgTiO3 systems were studied at 10–24 GPa and 1600 °C using a high-pressure Kawai-type multianvil apparatus. We investigated the full range of starting compositions for the enstatite-geikielite system to derive a P–X phase diagram and synthesize titanium-bearing phases, such as olivine/wadsleyite, rutile, pyroxene, MgTiSi2O7 weberite, bridgmanite and MST-bridgmanite in a wide pressure range. Olivine and pyroxene in run products are ch...
#1Xing Cui (HKU: University of Hong Kong)H-Index: 1
#2Min Sun (HKU: University of Hong Kong)H-Index: 93
Last. Yigui Han (Northwest University (United States))H-Index: 1
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Abstract High-grade metamorphic complexes are critical for the understanding of regional crustal configuration and accretionary history of the Altai orogenic belt. The orthogneissic rocks from the Northern Fuyun Complex, southern Chinese Altai, are investigated in this study. Zircon U Pb isotopic analysis yields ages of ca. 411–398 Ma, arguing against previous views that these rocks represent old Precambrian basement. All the samples are calc-alkaline, metaluminous to weakly peraluminous (ASI = ...
#1Zuo-Min Zhou (CGS: China Geological Survey)H-Index: 1
#2Changqian Ma (China University of Geosciences)H-Index: 25
Last. Wei LiuH-Index: 2
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Abstract Differences in the geothermal regime of continental intraplate regions depend mainly on the amount and distribution of radioactive heat production in crustal rocks. Granitoids are the predominant sources of radioactive heat production and have abundant radioactive heat-producing elements, such as uranium, thorium and potassium. The Mesozoic geology of the South China Block (SCB) is characterized by long-term continental reconstruction, widespread granitoids and super-large ore deposits ...
#1N. Kastek (Carleton University)H-Index: 1
#2James E. Mungall (Carleton University)H-Index: 25
Last. Brian L. Cousens (Carleton University)H-Index: 30
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Abstract The Superior craton is bordered on its northern and eastern sides by the approximately coeval Cape Smith fold belt and the Labrador Trough, two major Paleoproterozoic volcano-sedimentary belts that record broadly similar tectonic evolution but which show some distinctive characteristics and have notably different mineral resource endowments. The Roberts Lake Syncline, situated directly between the Cape Smith and Labrador Trough, hosts two Paleoproterozoic mafic volcanic sequences and ha...
#2Lingsen ZengH-Index: 10
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Abstract The Xigatze fore-arc basin, one of the well-preserved fore-arc basins worldwide, consists of interesting nearly E-W trending dike swarms of basaltic to granitic compositions. Mid-Miocene more felsic dikes to the responses of fore-arc lithosphere provide important records to the post-collisional processes. Miocene (~15–11 Ma, zircon U Pb ages) high Sr/Y magmatic rocks from the Xigatze area in this study are characterized by (1) rich in Na as compared with K contents (Na2O/K2O = 1.75–5.62...
#1Shuxiang Han (China University of Geosciences)
#2Chen Wu (CAS: Chinese Academy of Sciences)
Last. Guosheng Wang (China University of Geosciences)H-Index: 4
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Abstract The Paleoproterozoic tectonic setting and spatial-temporal evolution of the northern North China and Central Orogenic belt constrain the assembly of the North China craton. Here we describe a new Paleoproterozoic mafic-ultramafic unit and intermediate-mafic intrusions located between the Khondalite belt and Central Orogenic belt, which we refer to as Donggouzi mafic-ultramafic complex. This complex is structurally complicated, and comprises a mixture of peridotite, amphibole pyroxenite,...
#1Shifeng WangH-Index: 1
#2Wenkun TangH-Index: 1
Last. Xin Yao
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Abstract Correlation of blocks comprising the Pamir plateau with blocks in the Tibetan plateau is debated due to the complex tectonic history of amalgamated orogenic belts, followed by widespread Cenozoic intracontinental deformation within the Pamir plateau. Of particular interest is the Rushan-Pshart suture along the southern edge of the Central Pamir. It is uncertain if the suture zone is a Meso-Tethyan or a Paleo-Tethyan suture and if it is the western extension of the Bangong-Nujiang suture...
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