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Our knowledge of the lithospheric mantle beneath the Central Asian Orogenic Belt is still sparse. Petrologic, major- and trace-element studies on the peridotite xenoliths from the Cenozoic volcanic fields in the Aershan area, the central part of the Great Xing'an Range, NE China, provide insights into the nature and evolution of the lithospheric mantle beneath the eastern part of the belt. According...
In our paper, we suggested that the Junan granulite xenoliths and xenocrysts record evolution of the Precambrian lower crust beneath the southeastern North China Craton (NCC). Yuan and Xia (2015) disagree with us. However, they have not fully considered the evolutional histories of the NCC lithosphere, and geochemical and isotopic compositions of the Junan xenoliths. We also contend that they have...
Deep-seated xenoliths in volcanic rocks offer direct glimpses into the nature and evolution of the lower continental crust. In this contribution, new data on the U–Pb ages and Hf isotopes of zircons in six felsic granulite xenoliths and one pyroxenite xenolith from the Hannuoba Cenozoic basalts, combined with published data from mafic to felsic xenoliths, are used to constrain the lithological and...
Knowledge of the lower crust beneath the southeastern parts of North China Craton (NCC) is still sparse. The Junan basalts (67 Ma) in the southeastern NCC contain abundant xenoliths of lower crustal granulites, pyroxenites and mantle peridotites. We present integrated in-situ U-Pb ages and Hf isotopes of zircons from the Junan basalts and granulite xenoliths, to investigate accretion and modification...
Palaeozoic mafic igneous rocks are potentially significant in constraining the tectonic nature and evolution of the Kwangsian Orogeny in the eastern South China Block, yet they have received little attention because of their limited outcrop. Geochemistry and geochronology was carried out on newly identified Ordovician ultramafic–mafic appinites in the Wugongshan Domain of the Cathaysia Block. Seven...
We thank Zeng and Yan (2014) for their interest in our recent paper “Petrogenesis and geochronology of Cretaceous adakitic, I- and A-type granitoids in the NE Yangtze block: Constraints on the eastern subsurface boundary between the North and South China blocks”. However, Zeng and Yan (2014) have misinterpreted some available data and literature regarding the basement in the Yangtze block. After carefully...
In situ Zircon U–Pb ages and Hf-isotopes, whole-rock major- and trace elements, and Sr–Nd isotopic compositions of the Liudusi and Taiboding intrusions in the Jiaodong Peninsula (eastern China) are presented to trace their petrogenesis and relationships to lithosphere evolution. The Liudusi complex, which consists of biotite-bearing gabbro and quartz monzonite, formed at ca 115Ma. The rocks show shoshonitic...
The position of the subsurface boundary between the North China block (NCB) and South China block (SCB) has been debated, mainly using evidence from surface geology and geophysical observations. Here, petrochemical and geochronological data on four early Cretaceous granitic plutons from a focused area east of the Tan–Lu fault, NE Yangtze block, are reported to provide constraints on their petrogenesis...
Early Paleozoic amphibolite- to granulite-facies metamorphism, crustal anatexis and coeval magmatism are extensively developed in the Wuyi–Yunkai intraplate orogen in the South China block. However, the exact timing of granulite-facies partial melting and its link with orogenesis have not been well constrained. In this study, the charnockites, gneissic migmatites and Al-rich gneisses (Grt–Sil–Bt gneiss...
Eclogites and gneisses from the Yuka and Xitieshan areas in the North Qaidam orogen, NE Tibet, experienced ultrahigh-pressure (UHP) metamorphism in the early Paleozoic, when the Qaidam block subducted northwards beneath the Qilian block. U–Pb ages, trace-element patterns and Hf-isotope compositions of zircon in the two rock types were used to trace the isotopic and elemental changes within zircon...
Adakite was originally defined as a specific type of magmatic rock derived from melting of subducted oceanic plates (Defant, M.J., Drummond, M.S., 1990. Derivation of some modern arc magmas by melting of young subducted lithosphere. Nature 347 (6294), 662–665), producing unique chemical signatures with high Sr/Y and La/Yb. However, widespread occurrences of igneous rocks that are geochemically similar...
In situ Re–Os isotopic data for sulfide grains in mantle-derived peridotite xenoliths from eastern China demonstrate a close temporal linkage between crustal tectonism and fluid-migration events in the subcontinental lithospheric mantle (SCLM). In the Cathaysia block, T RD and T MA ages of sulfides with 187 Re/ 188 Os<0.11 cluster in four groups: Paleoproterozoic...
Mantle-derived garnet and spinel peridotite xenoliths and xenocrysts from the Daoxian basalts (151-131 Ma) and the Anyuan lamprophyres (~44 Ma) provide insights into the nature and evolution of subcontinental lithospheric mantle beneath the Cathaysia block, SE China. The Daoxian area lies astride the translithospheric Ningyuan-Jianghua fault zone in western Cathaysia, whereas the Anyuan area lies...
Xenolith-bearing Neogene basalts occur in Hebi county, at the southern end of the Taihangshan-Luliangshan paleo-rift zone in the North China block of the Sino-Korean craton. This locality lies on the North-South Gravity Lineament, which divides the craton into two geophysical zones. The spinel peridotite xenoliths hosted by the basalts can be divided into two groups based on the Mg # values...
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