The lithosphere structure of the Great Xing’an Range in the eastern Central Asian Orogenic Belt: Constrains from the joint geophysical profiling

Xiong, Xuejian; Gao, Rui; Li, Yingkang; Hanru, Hou; Liang, Hongda; Li, Wenhui; Guo, Lianghui; Lu, Zhanwu

doi:10.1016/j.jseaes.2015.06.006

Cited by 15 publications

(11 citation statements)

References 52 publications

(41 reference statements)

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“…All the heat flow of the three depressions indicate that the Erlian Basin belongs to a hot basin. This result is consistent with evidences from geology, geochemistry, and geophysical observations (An and Shi, 2006; Chen et al., 2012; Du et al., 2006; Fan et al., 2015; Guo et al., 2015; Lu et al., 1993; Xiong et al., 2015; Yuan et al., 2017; Zhang et al., 2006). And, it is also can be proved by our results of thermal structure, thermal lithospheric thickness, and thermal–rheological structure in the Uliastai Depression.…”

Section: Discussionsupporting

confidence: 90%

“…The Abaga volcanic field and Dalinuoer volcanic field developed in Quaternary (Fan et al., 2015). Geophysical surveys show that the total crustal thickness of the Hegenshan fold belt ranges from 39 to 40 km (Guo et al., 2015; Lu et al., 1993) and the lithospheric thickness is about 100 km (An and Shi, 2006; Xiong et al., 2015). There are geochemical evidences that the mantle peridotite xenoliths of Abaga and Jining were derived from the depths of 40–70 km (Chen et al., 2012; Du et al., 2006; Zhang et al., 2006).…”

Section: Introductionmentioning

confidence: 99%

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Present-day geothermal regime of the Uliastai Depression, Erlian Basin, North China

Wei

Huang

Zhang

et al. 2018

Energy Exploration & Exploitation

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In this study, we calculated the present-day terrestrial heat flow of the Uliastai Depression in Erlian Basin by using systematical steady-state temperature data obtained from four deep boreholes and 89 thermal conductivity measurements from 22 boreholes. Then, we calculated the lithospheric thermal structure, thermal lithospheric thickness, and lithospheric thermorheological structure by combining crustal structure, thermal conductivity, heat production, and rheological parameter data. Research from the Depression shows that the present-day terrestrial heat flow (q s) is 86.3 AE 2.3 mW/m 2 , higher than the average of 60.4 AE 12.3 mW/m 2 of the continental area of China. Mantle heat flow (q m) in the Depression ranges from 33.7 to 39.3 mW/m 2 , q m /q s ranges from 40 to 44%, show that the crust plays the dominant position in the terrestrial heat flow. The thermal thickness of the lithosphere is about 74-88 km and characterized by a "strong crust-weak mantle" rheological characteristic. The total lithospheric strength is 1.5 Â 10 12 N/m under wet mantle conditions. Present-day geothermal regime indicates that the Uliastai Depression has a high thermal background, the activity of the deep-seated lithosphere is relatively intense. This result differs significantly from the earlier understanding that the area belongs to a cold basin. However, a hot basin should be better consistent with the evidences from lithochemistry and geophysical observations. The results also show the melts/ fluids in the study area may be related to the subduction of the Paleo-Asian Ocean. The study of the geothermal regime in the Uliastai Depression provides new geothermal evidence for the

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Section: Discussionsupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Present-day geothermal regime of the Uliastai Depression, Erlian Basin, North China

Wei

Huang

Zhang

et al. 2018

Energy Exploration & Exploitation

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“…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

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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.

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“…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%

“…B. Zhou & Li, 2017 Hao, & Zhai, 2003). 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 Xiong et al, 2015). L. Miao et al (2008) proposed that the Hegenshan-Heihe Ocean ( Since then, the EB and XB have been amalgamated into a single block.…”

Section: Tectonic Setting and Geological Significancementioning

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

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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).

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The lithosphere structure of the Great Xing’an Range in the eastern Central Asian Orogenic Belt: Constrains from the joint geophysical profiling

Cited by 15 publications

References 52 publications

Present-day geothermal regime of the Uliastai Depression, Erlian Basin, North China

Present-day geothermal regime of the Uliastai Depression, Erlian Basin, North China

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

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