Lithospheric electrical structure of the Great Xing’an Range

Liang, Hongda; Gao, Rui; Hanru, Hou; Liu, Guoxing; Han, Jiangtao; Han, Seunghee

doi:10.1016/j.jseaes.2015.01.026

Cited by 20 publications

(12 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…350–330 Ma) was present along the eastern margin of the Xing'an Block in the Nenjiang–Moguqi area (Figure b). The existence of the magmatic arc clearly marks the location of the suture zone between the Xing'an and Songliao blocks and indicates a westward subduction of the oceanic crust, which is also supported by geophysical data (Hou et al, ; Liang et al, ; X. Z. Zhang et al, ).…”

Section: Discussionsupporting

confidence: 61%

Early Carboniferous tectonic evolution of the northern Heihe–Nenjiang–Hegenshan suture zone, NE China: Constraints from the mylonitized Nenjiang rhyolites and the Moguqi gabbros

Feng

Liu

et al. 2017

Geological Journal

View full text Add to dashboard Cite

The Heihe–Nenjiang–Hegenshan suture zone has long been accepted as the major tectonic boundary between the Xing'an and Songliao blocks and extends through the Great Xing'an Range in NE China, but its location of the northern segment between the Moguqi and Nenjiang areas and its timing remain unclear. We address these issues by presenting zircon LA‐ICP‐MS U–Pb ages, Lu‐Hf isotopes, bulk‐rock major, and trace elemental data for mylonitized rhyolites collected from the Moergenhe Formation in the Nenjiang area and for gabbros of the Moguqi area, respectively. The mylonitized rhyolites, which display an arc‐related geochemical affinity with enrichment in Th and U, and depletion of Nb, Ta, and Ti, and gently right‐tilted rare earth element (REE) patterns (light REE [LREE]/heavy REE [HREE] =4.53–7.60), as well as the εHf (t) values (+6.4 to +11.8) of analyzed zircons, indicate an origin by partial melting of potentially young lower continental crust of a subducting slab. The zircon LA‐ICP‐MS U–Pb data show the formation age of the mylonitized rhyolites is 352.4 Ma. The analyzed gabbros with an emplacement age of 352.6 Ma have high concentrations of Th and U, slightly enriched LREE patterns and relative low LREE/HREE ratios (4.3 to 4.6). These features, together with their high positive εHf (t) values (+7.7 to +15.2), suggest that they were likely derived from the partial melting of a depleted mantle source that was metasomatized by subduction‐related fluids. Combined with the geochemical features of the coeval igneous rocks from the northern Great Xing'an Range, these results reveal that the existence of an early Carboniferous NE‐trending magmatic arc (ca. 350–330 Ma), extending along the west of the Heihe–Nenjiang–Hegenshan suture zone, gives more constraints on the amalgamation of the Xing'an and Songliao blocks along the Nenjiang–Moguqi areas and indicates that the amalgamation should have terminated by at least the end of the early Carboniferous.

show abstract

Section: Discussionsupporting

confidence: 61%

Early Carboniferous tectonic evolution of the northern Heihe–Nenjiang–Hegenshan suture zone, NE China: Constraints from the mylonitized Nenjiang rhyolites and the Moguqi gabbros

Feng

Liu

et al. 2017

Geological Journal

View full text Add to dashboard Cite

show abstract

“…Moreover, Shao et al () proposed that several high‐velocity blocks below 400 km were discernible, as well as a low‐velocity and atypical deep‐seated block below 800–1000 km in this region. A 2D electrical structure model derived from magnetotelluric (MT) data also reveals a large‐scale high resistivity body in the lithospheric mantle beneath the CGXR (Liang et al, ; Xiong et al, ). These data can be explained by lithospheric delamination and upwelling asthenosphere beneath the central‐southern GXR (Shao et al, ).…”

Section: Discussionmentioning

confidence: 99%

Timing and evolution of Mesozoic volcanism in the central Great Xing'an Range, northeastern China

et al. 2018

View full text Add to dashboard Cite

In this paper, we report on LA‐ICP‐MS zircon U–Pb dates of 14 Mesozoic volcanic rocks from the central Great Xing'an Range (CGXR). These data are integrated with the temporal and spatial distribution of local magmatism‐related Mesozoic mineralization, in an effort to develop an understanding of the geodynamic evolution of the region. Periodic magmatic events in the GXR date from ~1,703 through ~145 Ma. Mesozoic volcanism in the CGXR can be subdivided into three episodes: Triassic (250–205 Ma), Early–Middle Jurassic (182–165 Ma), and Late Jurassic–Early Cretaceous (155–115 Ma). A revision of the previously defined volcanic sequence is offered using a combination of our zircon U–Pb ages and published Mesozoic geological and geophysical evidence from northeast China. We propose that (a) Early–Middle Triassic volcanism in the CGXR resulted from subduction of the Paleo‐Asian oceanic plate; (b) Late Triassic volcanism was related to subduction of the Mongol–Okhotsk oceanic plate (especially near the Erguna Block) and subsequent extension after the closure of the Paleo‐Asian Ocean; (c) Early–Middle Jurassic volcanism was mainly controlled by the southward subduction of the Mongol–Okhotsk oceanic plate; (d) Late Jurassic–initial Early Cretaceous magmatism was initiated by closure of the Mongol–Okhotsk Ocean; and (e) late Early Cretaceous volcanism was induced following the final closure of the Mongol–Okhotsk Ocean and rollback of the Paleo‐Pacific oceanic plate.

show abstract

“…The scarcity of Late Triassic marine sedimentary units shows that coeval magmatic activities were related to extensional settings in the eastern CAOB (W. Xiao, Windley, Hao, & Zhai, ). The characteristics of the crust and upper mantle within the Moguqi area also imply that the central GXR underwent a significant extensional event after the collision between the XB and SB, which was possibly related to the closure of the PAO (Liang et al, ; Xiong et al, ). L. Miao et al () proposed that the Hegenshan–Heihe Ocean (a branch of the PAO) had closed by the early Triassic forming a suture belt, constrained by a granodiorite dike at approximately 244 Ma.…”

Section: Discussionmentioning

confidence: 99%

Geochronology, petrogenesis, and tectonic setting of Late Triassic volcanic rocks of the Hadataolegai Formation, central Great Xing'an Range, Northeast China

et al. 2018

View full text Add to dashboard Cite

In this study, new geochemical, zircon U–Pb, and Lu–Hf isotopic data are presented for volcanics from the Hadataolegai Formation of the central Great Xing'an Range (GXR) in Northeast China. These new data offer insights into the petrogenesis of the volcanics of the Hadataolegai Formation and the tectonic evolution of the Paleo–Asian Ocean (PAO) and Mongol–Okhotsk Ocean (MOO). These volcanics of the Hadataolegai Formation are divided into andesite‐trachyandesites and dacite‐trachydacites. Zircon U–Pb ages show that the volcanics of the Hadataolegai Formation erupted between 230 Ma and 228 Ma during the Late Triassic, which agrees with recently obtained data. The volcanic rocks in this study have low Y (9.9–21.1 ppm) and Yb (0.78–2.02 ppm) contents, high Sr (444–954 ppm) contents, and slight Eu anomalies (δEu = 0.82 to 0.94), similar to ‘adakite‐like’ rocks. The dacites were formed by fractional crystallization of coeval andesitic magmas. The zircons within the andesite and trachyandesite yield higher positive εHf(t) values (+6.3 to +12.0) and model ages (TDM2) between 860 Ma and 453 Ma, which indicates that the magmas were generated by a newly accreted continental crustal source. Moreover, some of the volcanics are relatively high in MgO contents. These characteristics indicate that the volcanic magmas were derived from the partial melting of delaminated lower crust and mixing with mantle materials. Combining these data with previous studies, we suggest that the magmatism in the central GXR was governed by extension due to the closure of the PAO and the back‐arc extension associated with the southward subduction of the MOO plate (western GXR, near the Erguna Block).

show abstract

Lithospheric electrical structure of the Great Xing’an Range

Cited by 20 publications

References 25 publications

Early Carboniferous tectonic evolution of the northern Heihe–Nenjiang–Hegenshan suture zone, NE China: Constraints from the mylonitized Nenjiang rhyolites and the Moguqi gabbros

Early Carboniferous tectonic evolution of the northern Heihe–Nenjiang–Hegenshan suture zone, NE China: Constraints from the mylonitized Nenjiang rhyolites and the Moguqi gabbros

Timing and evolution of Mesozoic volcanism in the central Great Xing'an Range, northeastern China

Geochronology, petrogenesis, and tectonic setting of Late Triassic volcanic rocks of the Hadataolegai Formation, central Great Xing'an Range, Northeast China

Contact Info

Product

Resources

About