Peng Zicheng

University of Science and Technology of China, Hefei, Anhui Sheng, China

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Publications (7)10.32 Total impact

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    ABSTRACT: The microprobe EDXRF equipment was used for analysis of the major and trace elements in glaze layer-transitive layer-body layer of the celadon from the Altar Yao (Kiln) and Laohudong Yao in the Southern Song Dynasty (1127–1279 A.D.), Zhejiang, China. The K values of the discriminant factor for the celadon wares are larger than 8, which means the celadon of the Altar Yao and Laohudong Yao are different from that of the Longquan Yao. The former two belong to the Guan Yao system (the Chinese imperial kilns), but the latter to the Min Yao system (the Chinese popular kilns). The principle component analysis shows their relationship between the Altar and Laohudong wares with provenance postulation. The thickness of the transitive layer in the Altar and Laohudong wares is obviously different, which reveals the microstructure characteristics of the celadon even though both kinds of wares belong to the imperial kiln system.
    Acta Geologica Sinica 09/2010; 80(5):759 - 762. · 1.25 Impact Factor
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    ABSTRACT: Climate variability during the Late Pleistocene is studied from the proxies in core CK-2 drilled from the Luobei Depression (91°03′E, 40°47′N), Lop Nur in the eastern Tarim Basin, Xinjiang, China. Geophysical and geochemical properties, including magnetic susceptibility, granularity, chroma, carbonate content, loss on ignition and trace elements, have been determined to reconstruct the environmental evolution of the area during 32–9 ka BP. The chronology is established by uranium–thorium disequilibrium dating techniques.Our data suggest four paleoclimate stages, indicating glacial variations between cold–humid and warm–arid environments. A period of extreme humidity occurred during 31,900–19,200yr BP is attributed the last glacial maximum (LGM). The period was followed by a warm–arid episode during 19,200–13,500 yr BP. Then a cold–humid interval during 13,500–12,700 yr BP may correspond to another cooling phases at high latitudes of the Northern Hemisphere. The last stage from 12,700 to 9000 yr BP has a trend that the climate turned warm and arid. The Lop Nur region is characterized by particularly humid stadials and arid interstadials. The climate variability in Lop Nur was constrained by global climate change because it is correlated with Dansgaard–Oeschger and Heinrich events, which were observed at the northern high latitudes. The synchroneity of the palaeoclimatic events suggested that cold air activity at the northern high latitudes was the most important factor that influenced the climate evolution in the Lop Nur region. A probable mechanism that involves the migration of westerly winds is proposed to interpret this synchroneity.
    Journal of Asian Earth Sciences 01/2009; 34(1):38-45. · 2.38 Impact Factor
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    ABSTRACT: China's economy has developed rapidly in the last two decades, leading to an increase in energy consumption and consequently emissions from energy generation. Coal is a primary energy source in China because of its abundance and will continue to be used in the future. The dominance of coal in energy production is expected to result in increasing levels of exposure to environmental pollution in China. Toxic trace elements emitted during coal combustion are the main sources of indoor air pollution. They are released into the atmosphere mainly in the forms of fine ash and vapors and have the potential to adversely affect human health. Those trace elements, which volatilize during combustion, are hazardous air pollutants (HAPs) and are particularly rich in Chinese coals. Among the HAPs, arsenic (As), fluorine (F), and selenium (Se) have already been identified as pollutants that can induce severe health problems. In this review, the geochemical characteristics of As, F, and Se, including their concentration, distribution, and mode of occurrences in Chinese coal, are documented and discussed. Our investigations have confirmed the current As- and F-induced epidemics in Guizhou (Southwest China) and Se epidemic in Hubei (Northeast China). In this study, diagnostic symptoms of arseniasis, fluorosis, and selenosis are also illustrated.
    Reviews of environmental contamination and toxicology 02/2007; 189:89-106. · 4.13 Impact Factor
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    ABSTRACT: Abstract The Yanzhou mine district, located in southwestern Shandong Province, is about 1300 km2 with more than 8times109 tons of proved coal reserves and there are 10 big power plants in this area. A large amount of coal ashes, which are regarded as waste materials, have been stockpiled in the area and have influenced the environment of the mine district. In this paper, analysis of fly ash samples from three power plants is carried out, the enrichment and concentration of trace elements, Pb, Zn, Cu and As, in coal ashes are analyzed, and petrological and mineralogical characteristics and chemical compositions of coal ashes are studied. The aim of this work is to provide basic scientific data for utilization of ashes and reduction of environmental pollutions.
    Acta Geologica Sinica 05/2004; 78(3):720 - 723. · 1.25 Impact Factor
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    ABSTRACT: Coral samples collected from the waters off the Leizhou Peninsula, the Hainan Island and the Yongxing Island of the Xisha Islands were analyzed by thermal ionization mass spectrometry (TIMS) and multi-collector inductively coupled plasma mass spectrometry (MC-ICP-MS) for their U-Th systematics. Their uranium contents are mostly lower than 3μg/g, and the δ234U (T) values are within the range of 150 ±5. X-ray diffraction analysis showed that the corals are all composed of aragonite. This demonstrates that the corals determined have maintained a close system for 7000 years and their skeletons bear much information about the primitive tropical marine environment. The highly precise age sequence of the corals determined has revealed that there occurred three phases of high sea level in the South China Sea waters, which are dated at 6799-6307 a B. P., 4472-4285 a B. P. and 1279-1012 a B. P., respectively. The three phases lasted 492 a, 187 a and 267 a, respectively. These three phases of high sea level are corresponding to the warm environments that had appeared in China during the Megathermal Period and the Medieval Warm Period in the past ten thousand years.
    Chinese Journal of Geochemistry 01/2003; 22(2).
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    ABSTRACT: Spelean stalagmite dating using thermal ionization mass spectrometry (TIMS) on the basis of U-Th disequilibrium has contributed greatly to paleoclimatology, paleo-environment, paleo-oceanology, archaeology as well as modern volcano-magmatism studies. Results of our studies on stalagmite chronology are also reported in this paper.
    Chinese Journal of Geochemistry 12/1998; 18(1):25-29.
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    ABSTRACT: Two national stalagnlite standards (GBW04412, GBW04413) and one international coral standard (RKM-4) have been determined by using thcrmal ionization mass spcctrometry (TIMS) method. The values of (234U/238U)act, (230Th/234U)act and age are all consistent in error range with thc stantlard values obtained by using α spectrometry.
    Chinese Science Bulletin 01/1998; 43(4):333-336. · 1.32 Impact Factor

Publication Stats

55 Citations
10.32 Total Impact Points

Institutions

  • 2003–2010
    • University of Science and Technology of China
      • School of Earth and Space Sciences
      Hefei, Anhui Sheng, China
  • 2004
    • Northeast Institute of Geography and Agroecology
      • Institute of Earth Environment
      Beijing, Beijing Shi, China