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Proto-Tehtys Ocean in East Asia (II): Affinity and assmbly of Early Paleozoic micro-continental blocks

Published on Jan 1, 2016
LISanzhong48
Estimated H-index: 48
,
Zhao Shujuan3
Estimated H-index: 3
+ 11 AuthorsLan Haoyuan2
Estimated H-index: 2
Abstract
  • References (0)
  • Citations (5)
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Abstract Early Palaeozoic ophiolites emplaced in the central East Kunlun fault zone (CEKF) offer critical clues to the tectonic evolution of the Proto-Tethys ocean and the accretionary process of CEKF. The Qushi'ang Ophiolite, located within the eastern segment of the CEKF, consists of dismembered serpentinites, meta-gabbros and meta-basalts. This study presents petrologic, whole-rock geochemical, and in situ zircon U-Pb and Hf isotope data for basic rocks (both metagabbros and metabasalts) from...
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Abstract The Altun-Qilian-Kunlun Orogen, as a western segment of the Central China Orogen, has experienced a tectonic evolution of the Proto-Tethys Ocean and the Early Paleozoic orogenic movement, to produce multiple-stage Early Paleozoic structures and rocks. The corresponding ophiolites, metamorphic rocks and granites in the orogen show some similarities in petrology and geochemistry, especially isotopic geochronology. This indicates that they should be under the same subduction-accretion syst...
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High-temperature magma generation process and granulite-facies metamorphism can provide important information about mantle-crustal interaction and tectonic evolution. The strongly peraluminous monzonite pluton, the Jinshuikou cordierite granite on the southern margin of the Qaidam Block, can provide important information about the mantle-crustal interaction and constraints on tectonic transition from Proto-Tethys to Paleo-Tethys. This pluton develops enclaves of mafic granulite, amphibolite and ...
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Abstract The microcontinental blocks in the CAOB include the combined NE China blocks (comprising the Erguna, Xing'an, Songliao and Jimusi-Khanka blocks) in the eastern segment of the CAOB, the Kazakhstan-Yili-Central Tianshan and Junggar blocks in the western segment of the CAOB, and the Tuva-Mongolia blocks and Beishan block in the central segment of the CAOB. The basement in these microcontinental blocks mainly consists of Archean to Paleoproterozoic crystalline rocks and/or Meso-Neoproterozo...
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