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This paper reports LA–ICP–MS zircon U–Pb ages, geochemical data and zircon Hf isotope compositions of gabbroic rocks, plagiogranites, and granite porphyries exposed at the eastern margin of the Jiamusi Massif in the easternmost segment of the Central Asian Orogenic Belt (CAOB). LA–ICP–MS zircon U–Pb age data indicate that these rocks were emplaced at 290–274, 277, and 110Ma, respectively. The gabbroic...
Early Ordovician granites occur in the Gemuri and Bensong Co areas of the South Qiangtang terrane, northern Tibet, and LA-ICP-MS zircon U–Pb dating reveals that the magmatism took place between 486 and 480Ma. The Geochemical features of these Early Ordovician granites are comparable to those of high-K, calc-alkaline S-type granites. They exhibit negative values of zircon ε Hf (t) (−8.5 to...
To constrain the early Paleozoic tectonic evolution of the Jiamusi-Khanka Block and its relationship to the Late Pan-African event in Gondwana, we undertook zircon U-Pb dating and geochemical analyses (major and trace elements, and Hf isotopic compositions) of early Paleozoic intrusive rocks in the Jiamusi-Khanka Block, NE China. LA-ICP-MS zircon U-Pb age data demonstrate that these intrusive rocks...
We undertook zircon U–Pb dating and geochemical analyses of volcanic rocks from the Baiyingaolao Formation in the central Great Xing'an Range, northeastern China, with an aim to determine their age, petrogenesis and sources, which are important for understanding the Late Mesozoic tectonic evolution of the eastern section of the Central Asian Orogenic Belt. Lithologically, the Baiyingaolao Formation...
We present geochronological, geochemical, whole-rock Sr–Nd and zircon Hf–isotopic data for late Paleozoic volcanic rocks from the Daheshen Formation in central Jilin Province, northeastern China, and constrain the petrogenesis of the volcanic rocks and late Paleozoic tectonic evolution of the northern margin of the Northern China Craton, which is regarded as the eastern segment of the Central Asian...
New 40 Ar/ 39 Ar, geochemical and SrNd isotopic analyses of Eocene–Oligocene magmatic rocks in the Lut–Sistan region, eastern Iran shed light on their origin and the regional geodynamic evolution. Samples were collected from outcrops in the Sistan suture zone and to the west on the Lut block, which together constitute a diffuse magmatic province with an estimated size of ~300km×400km...
Ophiolite plays a key role in identifying paleo-ocean and paleo-plate and rebuilding the evolutionary history of ancient orogen. Mafic–ultramafic rocks are distributed in a broadly E–W direction in the middle of the Qiangtang terrane, northern Tibetan plateau. However, interpretation of these rocks as ophiolite and subsequent tectonic implications have been much disputed, and they were regarded by...
The Birjand ophiolite is one of the ophiolitic complexes in the northern Sistan suture zone, eastern Iran, which marks the closure of an enigmatic branch of the Neotethys Ocean (called the Sistan Ocean) associated with the collision between the Lut and Afghan continental blocks. Ophiolitic rocks in the suture zone occur as collisional block-to-block geological terranes, or as blocks within tectonic...
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