Geochemical data from this study indicate that Cenozoic basaltic magmas of North China were derived from two different mantle sources. Epuptions of alkali and subalkali basalts occurred respectively during Paleogene, Neogene, and Quaternary in North China.
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The localized distribution of the volcanic fields on the borders of NE China Plain may be attributed to the pathways for magma to come to the surface. ... R.X. Liu (Ed.), Cenozoic Basalt in China: Geochronology and Geochemistry, Seismology Press, Beijing (1992), pp. 330-338 (in Chinese) Google Scholar. Turner and Hawkesworth, 1995.
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The Emeishan Flood Basalt in SW China: A Mantle Plume Initiation Model and its Connection with Continental Breakup and Mass Extinction at the Permian-Triassic Boundary. Sun-Lin Chung, Sun-Lin Chung. Dept. of Geology, National Taiwan University, Taipei, Taiwan. Search for more papers by this author.
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Major and trace element concentrations for basalt samples from the Abaga volcanic field in central Inner Mongolia, eastern China. Download: Download spreadsheet (18KB) Supplementary Table A.2. Whole-rockSr–Nd–Pb isotopic compositions of basalt samples from the Abaga and Chifeng volcanic fields in central Inner Mongolia, eastern China.
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Continental intraplate basalts (15.42–0.16 Ma) from Abaga–Dalinuoer volcanic field (ADVF) in central Inner Mongolia of eastern China, as a part of Cenozoic volcanic province along eastern margin of the Eurasian continent, provide a good opportunity to explore potential links between deep subduction of the Pacific slab and continental intraplate volcanism.
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Notably, proven economic Cr deposits in China are dominated by ophiolitic chromite deposits, such as the Luobusa in Tibet and Saertuohai in Xinjiang Province (Zhu et al., 2013; Hu et al., 2014). Whether the distribution of chromite deposits is coupled to the distribution of high Cr geochemical anomalies or not remain unclear.
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Off the rugged coast of China's Zhejiang province, more than 18,000 remote islands lay adrift in the East China Sea. Many are uninhabited. Others are just big enough to poke their heads above ...
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Cenozoic basalts in Central and Eastern China are mainly distributed in the north with an area of 69 191 km2, while that of the southern part is 9334 km2, and their ratio is 88∶12.
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According to the division of basalt distribution regions, the CO 2 emission in the east of China close to the coastline is 3.67 Gt, which is the largest one taking 37% of the total CO 2 emissions in China.
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Here we present a case study from eastern China, combining major and trace element analyses with Ar–Ar and K–Ar dating to show that the spatio-temporal distribution of small-scale flood basalts...
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Extremely light apatite δD values indicate deep-originated water in intracontinental granites and basalts from the North China Craton, probably from a stagnant slab within the mantle transition zone.
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Cenozoic basalts in SE China may be derived from a mixture of depleted MORB mantle (DMM) and enriched mantle 2 (EM2) sources, but whether these basalts share a …
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Location of the study areas in eastern China (a). Sampling sites and basalt distribution in Leiqiong (b) and Xuyi area (c). Location of basalt bedrock, paired rice plant-root soil samples in Xuyi was from Wang et al. (2020). The distribution of Cenozoic basalts in Leiqiong and Xuyi was modified from Ho et al., 2000, Zeng et al., 2013, respectively.
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In China, basalt is mainly distributed in two major regions, the late Permian Emeishan large igneous province in southwestern China (Ali et al., 2005) and the zone of Cenozoic basalt in eastern China (Liu et al., 1992). Food crops including rice, maize and wheat are extensively cultivated in these two regions.
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Sketch map showing the distribution of Cen zoie basaltic rocks in North China. 1. Prec6nozoie basement; 2. Cenozoic uplifting region; 3. Cenozoic basin; Quaternary 4. basalt; 5. Late …
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The most recent studies of trace element distributions and radiogenic (Sr, Nd and Pb) and stable (O) isotope compositions have revealed that continental basalts of eastern China are highly …
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One of the remarkable Mesozoic geological signatures in the South China Block, composed of the Yangtze and Cathaysian blocks (Fig. 1 a), is the widespread occurrence of Mesozoic granitic rocks.The petrogenesis of the granitic rocks and their tectonic implications have been long debated with a range of extension, rift-related and convergent, subduction-related …
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Basalt accumulation at the base of MTZ, or the complementary harzburgite enrichment directly below it, has been reported in some regional studies, such as in southern Africa, northern China, the Samoa hot spot, the Hawaii hot spot, and a few subduction zones . Our results provide direct seismic evidence for basalt enrichment in the MTZ on a ...
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The basalt samples in the coastal regions of SCB show large variations in 87 Sr/ 86 Sr and low 143 Nd/ 144 Nd ratios. ... Timing and spatial distribution of rifting in China. Tectonophysics., 197 (1991), pp. 225-243. View PDF View article View in Scopus Google Scholar. Gilder et al., 1996.
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Herein, we report some major and trace elements of a weathering profile developed on Neogene basalt in northeast Hainan Island, South China. Because basalts are very sensitive to chemical weathering (Berner and Berner, 1997), and chemical weathering is significantly intensified by the tropical climate, most of the weathering profiles in this region have …
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Chemical weathering results in the breakdown of primary minerals in the rocks and mobilizes all chemical elements. As a result, the distribution of elements in weathering products differs greatly from that in parent rocks (Nesbitt et al., 1980; Nesbitt and Young, 1984).The weathering of silicate rocks is responsible for the long-term regulation of carbon cycle (Amiotte …
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The global distribution map of basalt samples is shown in Figure 4. Each basalt sample was assigned with 11 major elements (SiO2, Figure 4. Global distribution map of basalt sample collection ...
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The widespread Cenozoic basalts of eastern China occur >1000 km from the western Pacific subduction zone (Fig. 1).These intraplate basalts generally display depleted Nd isotopic and OIB-like trace-element compositions, suggesting an origin in asthenospheric mantle containing recycled oceanic-crust components (Niu, 2005; Xu et al., 2018).Their abnormally …
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The simplified geological map of North China Craton at the lower right corner in (a) is after Zhao et al. (2001). The location of the Yujiagou basalts is marked by a red triangle (E118°46′57.7 ...
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The 40Ar–39Ar dating reveals three episodes of basaltic volcanism in eastern Guangdong of SE China since the late Eocene (i.e., 35.5, ~20 and 6.6 Ma). The Miocene alkali olivine basalts (~20 and 6.6 Ma) have OIB-like trace element characteristics, which is coupled with low (87Sr/86Sr)i, high εNd(t), and high εHf(t). In contrast, the late Eocene basalts (35.5 …
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The petrogenesis of high-μ (HIMU, μ = 238 U/ 204 Pb) basalt in a continental setting remains highly controversial. Here we present a comprehensive geochemical (including major and trace element and isotopic compositions of whole-rock, olivine and melt inclusion) data on Jurassic HIMU-like basalts from the interior (Antang) of South China.
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(b) Distribution of Cenozoic basalts in Nanjing basaltic field, central eastern China. Distributions of Cenozoic basalts in this area are after Anhui Institute of Geological Survey [1977], Jiangsu Institute of Geological Survey …
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Based on over one hundred K–Ar ages obtained from previous studies (Table 3) and this study (Table 1), the temporal and spatial distribution patterns of the Cenozoic volcanic rocks in northeast China have been reconstructed (Fig. 3, Fig. 4, Fig. 5, Fig. 6) and are summarized in Fig. 7.It has been shown that the volcanism was restricted to the southern part …
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The base map was revised from the Standard Map of China. Distribution of gem deposits in China. ... of the most important sapphire mines in China [10, 11]. It lies within a basalt-hosted corundum ...
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Chemical weathering of rocks has substantial influence on the global geochemical cycle. In this paper, the geochemical profile of a well-developed basalt weathering profile (>15 m thick, including soil, saprolite, semi-weathered rock and fresh basalt) on the Island of Hainan (South China) was presented.The soil and saprolite samples from this profile are characterized …
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Distribution of oil and gas is controlled predominantly by the hydrocarbon generating center. The play requires communication with faults or unconformities. Near-source plays are in the faulted basins in eastern China. ... Subei, and other basins of China, such as, the Karamay basalt hydrocarbon reservoir in the northwest margin of the Junggar ...
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The distribution of mafic–ultramafic intrusive rocks by aeromagnetic data in China. ① YarlungZangbo ultramafic rock belt, ② PangongTso-Nagchu ultramafic rock belt, ③ Jinshariver-Ailao Mtn. ultramafic rock belt, ④ Western Kunlun-Altun Mtn. ultramafic rock belt, ⑤ Qilian Mtn. ultramafic rock belt, ⑥ Eastern Kunlun Mtn. ultramafic ...
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Here, we document a kind of xenolith-rich alkaline basalts from the Nanjing basaltic field, eastern China. These basalts contain lower concentrations of CaO (4.1–7.8 wt %) and Sc (3.3–17.8 ppm) and have lower Ca/Al (0.3–0.6) …
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The magnetic properties and magnetic mineralogy of a weathering sequence of soils developed on basalt parent material from eastern China, were studied by rock magnetism, X-ray diffraction and soil chemical analyses to establish the connection between mineral magnetic properties and pedogenic development in a subtropical region.
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In China, basalt deposits are quite abundant, and they are mainly distributed in the southern foot of the Qinling, Gansu, Heilongjiang, Dalian, Jilin, and Xinjiang regions; the Himalayas in Tibet; and the Qinghai, Shanxi, Fujian, Shandong, Anhui and coastal areas of southern China. 48 Among them, the basalt storage capacity reached 500 million ...
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China exports 51.4 million tons of steel and imports 37.9 million tons, a net export of 13.5 million tons. 3 China's steel products are mainly used to support industrialization and urbanization. China's steel sector emitted more than 1.5 billion tons of CO 2 in 2017.4 This accounts for 17% of the national total, making it the second largest ...
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The chemical compositions of the extrusive rocks are characterized by both alkaline basalt and tholeiitic basalt, and belong to the subalkaline type of transitional basalt magma eruption. ... LUO Zhili. A discussion of taphrogenesis and hydrocarbon distribution in China. Bulletin of the Chinese Academy of Ge- ological Sciences, 1984, 6(3): 99â ...
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Twenty-one basalt samples were collected from the southeastern part of the North China Craton, with thirteen from the Changle-Linqu area in western Shandong province and the rest from the Hefei basin in Anhui province (Fig. 1). These basalts are generally porphyritic, containing olivine, clinopyroxene and plagioclase phenocrysts.
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However, Kimura et al. examined the chemical geodynamics of the late Cenozoic basalts in East Eurasia and proposed that the late Cenozoic intraplate basalt in Northeast China is mainly controlled by the deep plume induced by the sinking Izanagi Plate and that fluid is mainly driven by the plume and moves upward and then laterally. In this case ...
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