Geochronology and geochemistry of the Hegenshan ophiolitic complex: Implications for late-stage tectonic evolution of the Inner Mongolia-Daxinganling Orogenic Belt, China

Miao, Laicheng; Wu, Fan; Liu, Dunyi; Zhang, Fuqin; Shi, Yuruo; Guo, Feng

doi:10.1016/j.jseaes.2007.11.005

Cited by 400 publications

(251 citation statements)

References 53 publications

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“…The measured 143 Nd/ 144 Nd ranges from 0.512773 to 0.512878 and e Nd (t) from ?3.98 (1984), and decay constants of U and Th are from Steiger and Jager (1977) to ?5.88, and a range of depleted mantle Nd model ages (T DM ) from 421 to 644 Ma, similar to a Triassic plagiogranite that intruded into the Hegenshan ophiolite suite (Miao et al 2008). They have much higher Nd and slightly lower Sr isotope ratios than other contemporaneous felsic lavas and even the basaltic magmas from the Hinggan Mountains (Fig.…”

Section: Sr-nd-pb-hf Isotopesmentioning

confidence: 77%

“…1b), suggesting that multi-stage oceanic subduction and continent-arc collision occurred during the closure of the Paleo-Asian and Mongolia-Okhotsk Oceans Shi et al 2004;Miao et al 2008). The Hegenshan ophiolite complex is the largest and records the formation of oceanic crust at about 300 Ma, and was intruded by a plagiogranite at ca.…”

Section: Background Geology and Petrographymentioning

confidence: 99%

“…The Hegenshan ophiolite complex is the largest and records the formation of oceanic crust at about 300 Ma, and was intruded by a plagiogranite at ca. 244 Ma (Robinson et al 1999;Miao et al 2008). In addition to the Paleozoic ophiolite suites, low-K calc-alkaline and tholeiitic basalts and andesites from the Dashizhai Formation are distributed in a SW-trending direction from Ulanhot to Linxi (Fig.…”

Section: Background Geology and Petrographymentioning

confidence: 99%

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Early Cretaceous highly positive ε Nd felsic volcanic rocks from the Hinggan Mountains, NE China: origin and implications for Phanerozoic crustal growth

Guo

et al. 2008

Int J Earth Sci (Geol Rundsch)

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An early Cretaceous (135 ± 2 Ma) felsic volcanic suite of dacite and rhyolite from Huolinhe, NE China is characterized by large ion lithophile element and light REE enrichment and high field strength element (HFSE, e.g., Nb and Ta) and Ti-P depletion, and bulk silicate earth-like Sr [ 87 Sr/ 86 Sr(i) = 0.70409-0.70481], quite radiogenic Nd [e Nd (t) = ?3.98 to ?5.88], Pb [e.g., 206 Pb/ 204 Pb(i) = 18.46-18.55] and Hf [e Hf (t) *?9.2] isotope compositions. Compared with contemporaneous mafic rocks in the region, these felsic rocks have even higher Nd and Hf isotopic ratios, precluding an origin through differentiation of coeval mantle-derived magmas. Isotope calculation results suggest that these magmas were derived from a preexistent mixture composed of mainly juvenile crust (70-80%), and a subordinate recycled crustal component (20-30%) having highly radiogenic Sr and Pb and unradiogenic Nd and Hf. About 25-30% melting of such a mixed source produced the primary dacitic magma. The rhyolites, which have relatively low MgO, FeOwere differentiates of the dacites after removal of a fractional assemblage of hornblende ? plagioclase ? K-feldspar ? apatite ? zircon. Considering the prolonged events (from 262 to 130 Ma) that produced such highly positive e Nd felsic igneous rocks in the region, we prefer a pre-Mesozoic crustal growth model related to arc accretion associated with the Paleo-Asian Ocean subduction.

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Section: Sr-nd-pb-hf Isotopesmentioning

confidence: 77%

Section: Background Geology and Petrographymentioning

confidence: 99%

Section: Background Geology and Petrographymentioning

confidence: 99%

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Early Cretaceous highly positive ε Nd felsic volcanic rocks from the Hinggan Mountains, NE China: origin and implications for Phanerozoic crustal growth

Guo

et al. 2008

Int J Earth Sci (Geol Rundsch)

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“…Ba/Nb and Ba/La versus ε Hf (t) and ε Nd (t) plots of the Yanbian Permian mafic intrusions. The Hf-Nd isotopic compositions of depleted mantle (DM) in NE China are estimated from the mafic components of the Hegenshan ophiolite suite and the Dashizhai arc basalts in Inner Mongolia (Guo et al, 2009a;Miao et al, 2008). Hf and Nd concentrations of DM are assumed to be somewhat lower than primitive mantle (Sun and McDonough, 1989).…”

Section: Possible Genetic Relationship Between the Gabbros And Dioritesmentioning

confidence: 99%

“…In the CAOB, multi-stage subduction of the paleoAsian Oceanic slab occurred. Along the subduction zones distribute several ophiolitic belts and subduction-accretion complexes with emplacement age from~600 Ma to 300 Ma (e.g., Jian et al, 2008;Miao et al, 2008;Zhou and Wilde, 2013;Xiao et al, 2015;Song et al, 2015).…”

Section: Hf-nd Isotopic Constraints On Evolution Of the Paleo-asian Omentioning

confidence: 99%

Variable sediment flux in generation of Permian subduction-related mafic intrusions from the Yanbian region, NE China

Guo

et al. 2016

Lithos

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Final closure of the Paleo‐Asian Ocean along the Solonker Suture Zone: Constraints from geochronological and geochemical data of Permian volcanic and sedimentary rocks

et al. 2014

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There is a broad consensus that the Solonker Suture Zone marks the final closure of the Paleo-Asian Ocean, which led to the formation of the eastern segment of the Central Asian Orogenic Belt. However, when and how the final closure occurred still remains controversial. To address this issue, provenance analysis of Permian sedimentary rocks of arc basins along the Xar Moron River was carried out. Geochemical analysis revealed a close relationship between the sedimentary and volcanic rock suite in the study region suggesting short transport distances and a complex convergent arc setting. Detrital zircon U-Pb analysis identified two major age provenances: (1) the Precambrian basement of the North China Craton (~2497 Ma and~1844 Ma) and (2) the Paleozoic Southern Accretionary Orogen along the northern margin of North China (~436 Ma and 269 Ma). The present locations of identified age provenances indicate southward subduction beneath the northern margin of North China. A comparison of the youngest age population in the sedimentary rocks with U-Pb ages obtained for subduction-related volcanic rocks implies that the Solonker Suture Zone formed from the Late Permian to Early Triassic. The results of our study advocate a complex Permian arc system which was probably similar to present-day Southeast Asia.

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Geochronology and geochemistry of the Hegenshan ophiolitic complex: Implications for late-stage tectonic evolution of the Inner Mongolia-Daxinganling Orogenic Belt, China

Cited by 400 publications

References 53 publications

Early Cretaceous highly positive ε Nd felsic volcanic rocks from the Hinggan Mountains, NE China: origin and implications for Phanerozoic crustal growth

Early Cretaceous highly positive ε Nd felsic volcanic rocks from the Hinggan Mountains, NE China: origin and implications for Phanerozoic crustal growth

Variable sediment flux in generation of Permian subduction-related mafic intrusions from the Yanbian region, NE China

Final closure of the Paleo‐Asian Ocean along the Solonker Suture Zone: Constraints from geochronological and geochemical data of Permian volcanic and sedimentary rocks

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