Abstract A zircon U‐Pb geochronological study on the volcanic rocks reveals that both of the Zhangjiakou and Yixian Formations, northern Hebei Province, are of the Early Cretaceous, with ages of 135–130 Ma and 129–120 Ma, respectively. It is pointed out that the ages of sedimentary basins and volcanism in the northern Hebei ‐western Liaoning area …
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Stereographic projections (Wulff net, lower hemisphere) showing the tectonic foliation and stretching lineation of minerals for the Archean meta-igneous rocks in the western Liaoning-eastern Hebei provinces
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jiakou-Luanping of North Hebei are found to be conformable. The evidence above indicates that the Zhangjiakou and Tuchengzi For-mations, which are distributed in Zhangjiakou-Luanping, were formed under the same geological setting. ... volcanic rocks of the Yixian Formation formed, and the lithologies of the two formations are similar. This has ...
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The Yixian Formation is mainly represented by a set of volcanic-pyroclastic rock series. The Lower and Middle parts of the formation are mainly built up by yellow gray and gray black basalt, with basaltic breccia lava and sedimentary rocks, …
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New petrological and geochemical data for Early Cretaceous volcanic rocks in the North China Craton (NCC) combined with published data of cotemporaneous volcanic rocks in the NCC and eastern Central Asian Orogenic Belt (ECAOB) are used to understand their petrogenesis and crustal growth and evolution.
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We report on volcanic rocks of the Qinglong-Zhuzhangzi area in northeastern Eastern Hebei Province, North China Craton. The supracrustal rock associations in the study area consist of amphibole ...
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The eastern Hebei-western Liaoning provinces are the largest exposure regions of Archean basement rocks in the northern part of North China Craton.
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To isolate the volcanic rock velocity, we multiply the residual velocity by the volcanic rock distribution data. By setting the amplitude envelope attribute value of the volcanic rock region to 1 and other positions to 0 as a mask, the product of the two reveals the residual velocity body containing only volcanic rock, as shown in Fig. 6 ...
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Tibetan Plateau, located in the eastern segment of the Tethyan domain, is a product of the India-Asia continental collision orogeny (e. g., Kapp and DeCelles, 2019).Following the India-Asia collision occurred in the early Cenezoic (Ding et al., 2017; Mo et al., 2007), extensive Miocene volcanic activity, dominated by potassic and ultrapotassic rocks (characterized by K 2 …
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The distribution and organic geochemical characteristics of the Mesoproterozoic source rock were also summarized. Three sets of source rock in the central NCC, namely the Chuanlinggou, Hongshuizhuang and Xiamaling Formations developed favorable geological and geochemical conditions for the generation of the hydrocarbon.
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The petrogenesis and temporal–spatial distribution of these metamorphosed volcanic rocks and the intrusive granitoid gneisses in the WLP indicate that this basement terrane probably evolved as an intra-oceanic arc system, with major crustal growth at ca. 2.5–2.6 Ga. These rocks record complex crust–mantle evolution history as follows.
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Rounded to sub-rounded quartz phenocrysts occur in many granites, volcanic rocks, metamorphic rocks and hydrothermal deposits (Bineli Betsi and Lentz, 2010; Breiter et al., 2017; Müller et al., 2002, Müller et al., 2010; Spear and Wark, 2009).These quartz phenocrysts may derive from a variety of processes, namely (a) crystallization in a high-temperature magma …
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In this study, we focus on middle-late Jurassic volcanic rocks, termed as Tiaojishan or Lanqi Formation, in the YFTB of the northern NCC (Fig. 1 b).Previous studies revealed that they are mainly hydrous, calc-alkaline to high-K calc-alkaline volcanic rocks (Yang and Li, 2008; Ma et al., 2015; Meng et al., 2018).Here, radioisotopic ages (zircon U Pb and whole-rock Ar …
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Quartz phenocrysts are common in many granites, volcanic rocks, metamorphic rocks and hydrothermal deposits. The Dongping porphyritic granite contains large amounts of rounded to sub-rounded quartz phenocrysts. Minerals in this porphyritic granite show weak but distinct orientation. Dense clusters of fluid inclusions and albite crystals exist in the quartz, showing …
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Voluminous Archean rocks (including orthogneisses and supracrustal rocks) are exposed in Eastern Hebei, northern part of the North China Craton (NCC), and nearly all of …
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The volcanic region of NE China (region A in Fig. 1, including volcanic fields 1-13), which includes the three provinces Liaoning, Jilin and Heilongjiang and the northeastern part of Inner ...
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Several major volcanic zones are distributed across the eastern North China Craton, from northwest to southeast: the Greater Xing'an Range, Jibei-Liaoxi, Xishan, and Songliao Basins, and the Yanji, Huanghua, and Ludong volcanic zones. The Huanghua depression within the Bohai Bay Basin was filled by middle Late Mesozoic volcanic rocks and …
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In the Caozhuang area of Eastern Hebei, ca. 2.9 Ga rocks are more scarce and only locally preserved. ... the North China Craton (revised after Diwu et al., 2020), and geographic distribution of ca. 2.9 and 2.7 Ga rocks. ... assemblages with minor sedimentary rocks, in which mafic volcanic rocks commonly exceed 50% and associated with minor ...
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This paper presents the results of the first systematic dating of the volcanic rocks from the southern Great Xing'an Range. A total of forty-three samples, including rhyolite/felsite, rhyolitic tuff/ignimbrite, dacite, and andesite from all the four named formations were dated by the single zircon U–Pb method and whole rock 40 Ar/ 39 Ar incremental technique.
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The map of zoning and distribution of Cenozoic volcanic rocks in China. Cenozoic volcanic rocks are mainly distributed in the NE, SE and …
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volcanic rocks was mainly dominated by the Mongol–Okhotsk tectonic regime, and the Erguna Massif was in a back-arc ... This massif is characterized by the distribution of * Gong-Zheng Chen 86793604@qq * Guang Wu ... 3 College of Earth Sciences, Hebei GEO University, Shijiazhuang 050030, China
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Quartz phenocrysts are common in many granites, volcanic rocks, metamorphic rocks and hydrothermal deposits. The Dongping porphyritic granite contains large amounts of rounded to sub-rounded quartz phenocrysts. Minerals in this porphyritic granite show weak but distinct orientation.
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Systematic geochronology and geochemistry were performed on the volcanic rocks in the Ganhe area, northern Great Xing'an Range, northeastern China. Zircon U–Pb data indicate that there are three periods of volcanism in the Ganhe area, namely the Manketouebo Formation (166.3 ± 2.5 Ma), Manitu Formation (155.2 ± 1.4 Ma), and Baiyingaolao Formation …
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Cenozoic volcanic rocks are mainly distributed in the NE, SE and Qinghai-Tibet Plateau in China. Based on the tectonic units and origin of magma, Cenozoic volcanioes are divided into five...
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In this paper, dolostone forma-tion(DGF), gneiss formation (GGF) and sandstone forma-tion (SGF) in Xinglong-Kuancheng of Yanshanshan Mountain in Hebei are taken as objects to …
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The outer edges of the basins or plains are very different, and varying degrees of multi-age mixed and multi-lithology coexisting rock masses dominated by acidic magma and the sporadic distribution of volcanic craters or crater groups with rapidly changing geothermal gradients developed.
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Numerous volcanoes are present north of Hainan Island, which represent Quaternary volcanoes in China [8].A considerable amount of magma was transported to the surface of the Earth as a result of intense volcanic activity forming basalt [9].Basalt-based soils reportedly contain high background levels of heavy metals [10].However, reports on the …
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Among them, the composition of the 2.5 Ga Changyukou volcanic rocks and potassic granites as well as the clockwise hybrid ITD and IBC P–T paths of the HP granulites may reveal that the tectonic setting in Northwest Hebei was in a transition stage from a subduction-related compressional regime to an extensional regime related to plate rollback.
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The geochemical characteristics of the volcanic rocks are similar to those of the Beitashan Formation in the region and are typical island arc volcanic rocks (Deng et al., 2009). The Carboniferous volcanic rocks are mainly stomatal andesite the REE standard distribution pattern belongs to LREE enrichment type.
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Voluminous Archean rocks (including orthogneisses and supracrustal rocks) are exposed in Eastern Hebei, northern part of the North China Craton (NCC), and nearly all of these Archean rocks have ...
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In West Liaoning-North Hebei, the Tiaojishan Formation volcanic rocks are developed and many isotopic ages with a very wide age range were obtained in them as well. These different ages have direct influence on confirming and interpreting the related geological issues in West Liaoning-North Hebei and have restricted the study of geological problems …
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The above diverse opinions were mainly arisen due to the scarcity of precise eruption ages and undetermined spatial distribution of these volcanic rocks. It has been suggested that the volcanic rocks were erupted during the Middle Jurassic and Early Cretaceous, but this conclusion was mainly based on K–Ar, Rb–Sr isochron and few zircon U ...
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Based on temporal-spatial distribution, the volcanism was associated with three major different geological settings: 1) the continental rift basalts in Northeast and North China; 2) the tension …
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Zhai Mingzhe: 1981, On the petrology and petrogenesis of Hannuob basalts in Hebei Province, in press. Zhou Xinghua and Armstrong R. L.: 1981, Cenozoic volcanic rocks of eastern China—secular and geographic trends in chemistry and strontium isotopic composition, in press. Poldervaard A.: 1964, Chemical definition of alkali basalts and tholeiites.
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