Paleozoic Continental Accretions in Central Asia Around Junggar Block: New Structural and Geochronological Data

Charvet, Jacques; Laurent‐Charvet, Sébastien; Shu, Liangshu; Ma, Ruixue

doi:10.1016/s1342-937x(05)70395-6

Cited by 25 publications

(15 citation statements)

References 4 publications

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“…A coloured mélange yields olistoliths of serpentinite, gabbro, pyroxenite, basalt, meta-tuff, chert, and marble. This ophiolitic mélange [7,10,11,62,63] is a part of the CTSZ accretionary wedge [10,11,14,15,26,31,62,75]. As previously discussed, the formation age is likely Devonian.…”

Section: Kumux-toksunmentioning

confidence: 92%

“…These ophiolite and ophiolitic mélanges were initially assumed to be rooted to the north and emplaced from north to south, onto the Tarim passive margin, after a northward stage of subduction [6,7,36,37,42]. But our kinematic studies indicate that these nappes were actually emplaced from south to north, in East Tianshan [10,11,[13][14][15][16], and in West Tianshan as well [26,29,31,33]. Therefore, the root is located to the south, a hidden zone between the ophiolite outcrops and the Tarim.…”

Section: General Geological Settingmentioning

confidence: 97%

“…A major feature is the angular unconformity of Lower Carboniferous conglomeratic molasse, which clearly overlies various older rocks: Ordovician-Silurian schist, gneiss, or Devonian granite [10,11,13,14,29,41,53,60]. Rare volcanic rocks interbedded within the Carboniferous molasse (i.e.…”

Section: General Geological Settingmentioning

confidence: 99%

“…Located between the Tarim Basin to the south and the Junggar Basin to the north (Figure 1), it is a key area for testing the tectonic models of the CAOB. Two main stages of accretion/collision have been advocated [5][6][7][8][9][10][11][12][13][14][15][16]. The Chinese Tianshan is usually divided into North, Central, South Tianshan (NTS, CTS, STS), and Yili Unit also called Yili Block in the western part (Figure 1).…”

Section: Introductionmentioning

confidence: 99%

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Palaeozoic tectonic evolution of the Tianshan belt, NW China

Charvet

Shu

Laurent‐Charvet

et al. 2011

Sci. China Earth Sci.

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International audienceThe Chinese Tianshan belt is a major part of the southern Central Asian Orogenic Belt, extending westward to Kyrgyzstan and Kazakhstan. Its Paleozoic tectonic evolution, crucial for understanding the amalgamation of Central Asia, comprises two stages of subduction-collision. The first collisional stage built the Eo-Tianshan Mountains, before a Visean unconformity, in which all structures are verging north. It implied a southward subduction of the Central Tianshan Ocean beneath the Tarim active margin, that induced the Ordovician-Early Devonian Central Tianshan arc, to the south of which the South Tianshan back-arc basin opened. During the Late Devonian, the closure of this ocean led to a collision between Central Tianshan arc and the Kazakhstan-Yili-North Tianshan Block, and subsequently closure of the South Tianhan back-arc basin, producing two suture zones, namely the Central Tianshan and South Tianshan suture zones where ophiolitic mélanges and HP metamorphic rocks were emplaced northward. The second stage included the Late Devonian-Carboniferous southward subduction of North Tianshan Ocean beneath the Eo-Tianshan active margin, underlined by the Yili-North Tianshan arc, leading to the collision between the Kazakhstan-Yili-NTS plate and an inferred Junggar Block at Late Carboniferous-Early Permian time. The North Tianshan Suture Zone underlines likely the last oceanic closure of Central Asia Orogenic Belt; all the oceanic domains were consumed before the Middle Permian. The amalgamated units were affected by a Permian major wrenching, dextral in the Tianshan. The correlation with the Kazakh and Kyrgyz Tianshan is clarified. The Kyrgyz South Tianshan is equivalent to the whole part of Chinese Tianshan (CTS and STS) located to the south of Narat Fault and Main Tianshan Shear Zone; the so-called Middle Tianshan thins out toward the east. The South Tianshan Suture of Kyrgyzstan correlates with the Central Tianshan Suture of Chinese Tianshan. The evolution of this southern domain remains similar from east (Gangou area) to west until the Talas-Ferghana Fault, which reflects the convergence history between the Kazakhstan and Tarim blocks

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Section: Kumux-toksunmentioning

confidence: 92%

Section: General Geological Settingmentioning

confidence: 97%

Section: General Geological Settingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Palaeozoic tectonic evolution of the Tianshan belt, NW China

Charvet

Shu

Laurent‐Charvet

et al. 2011

Sci. China Earth Sci.

Self Cite

446

311

View full text Add to dashboard Cite

show abstract

“…The southern boundary of the CAOB is the Tianshan-Solonker suture, which extends along the northern margins of the Tarim and North China cratons (Zonenshain et al, 1990;Allen et al, 1993;Şengör and Natal'in, 1996). Current data suggested that the southern part of the CAOB accreted northward (present coordinates) towards the Siberian craton (Windley et al, 2007;Xiao et al, 2009c), but some authors argued for accretion to the south in the Tianshan region (Charvet et al, 2001(Charvet et al, , 2007Lin et al, 2009;Wang et al, 2010). During the Permian to Triassic considerable displacements may have taken place on large-scale strike-slip faults or as a result of block rotation (Allen et al, 1995;Laurent-Charvet et al, 2002Charvet et al, 2007;Lin et al, 2009;Wang et al, 2010).…”

Section: Geological Settingmentioning

confidence: 96%