Advanced Search

Indexed by SCI、CA、РЖ、PA、CSA、ZR、etc .

Volume 15 Issue 2
Jun 2004
Turn off MathJax
Article Contents
Fangzheng Wang, Baoqun Hu, Guxian Lü, Ruixun Liu. Geobarmal Gradient in Orogenic Belt and Metamorphism Caused by Ultrahigh Pressure. Journal of Earth Science, 2004, 15(2): 178-182.
Citation: Fangzheng Wang, Baoqun Hu, Guxian Lü, Ruixun Liu. Geobarmal Gradient in Orogenic Belt and Metamorphism Caused by Ultrahigh Pressure. Journal of Earth Science, 2004, 15(2): 178-182.

Geobarmal Gradient in Orogenic Belt and Metamorphism Caused by Ultrahigh Pressure

Funds:

the Major Science and Technology Development Program of the Ministry of Land and Resources 2002201

  • Received Date: 14 Jan 2004
  • Accepted Date: 08 Feb 2004
  • The components and structures of lithosphere, inhomogeneous, are changing incessantly in different periods. Therefore, the state of load, called the pressure, in lithosphere is also incessantly changing. When the lithosphere volume remains the same, namely on the premise of isovolumes, the geobarmal gradient is: (dp/dh)v=(∂p /∂h)v+(∂p /∂T)v(dT/dh)v. If β =(dp/dh)v/(∂p /∂h)vis supposed, then β =1+ rg-1 Cv(dT/dh)v. When the geothermal degree in (dT/dh)vis zero, then the pressure grade of lithosphere is equal to the lithostatic grade, which is the minimum value in the pressure grade of lithosphere. Suppose that the lithosphere is made only up of quartz, CvCp =0.782+5.718×10-4 T-1.883×104T-2 (J·g-1·K-1) is obtained, which is the minimum one in lithospheric rock, and then the geothermal grade value of 20 ℃/km is calculated according to the geophysical transection data of Qinling Mountain orogeny. The results show that the high pressure and ultrahigh pressure eclogites in Jiangsu Province and Huangzhen, Dabie may, on the condition of incompletely isovolumes, occur in the depths of 17-40 km with the increase in geothermal temperature, whose values of β do not correspond to the theoretic value of 3.08.

     

  • loading
  • Fan, J. T., Cheng, Z. X., 1998. The Genetic Type and the Formative Condition of Eclogite on North Jiangsu Province. Journal ofMineralogy and Petrology, (2): 118- 127(in Chinese with English Abstract)
    Gao, S., Luo, T. C., Zhang, B. R., et al., 1998. Chemical Composition of the Continental Crust as Revealer by Studies in East China. Geochim. Cosmochim. Acta, 62: 1859-1875 https://www.sciencedirect.com/science/article/pii/S0016703798001215
    Holbrook, W. S., Mooney, W. D., Christensen, N. I., 1992. The Seismic Velocity Structure of the Deep Continental Crust. In: Fountain, D.M., ed., Continental Lower Crust. Elsevier, Amsterdam. 1-34
    Wang, F. Z., Lu, F.X., Sun, P., 1995. The PetrologyModel of the Geoscience Transection for the Continental Lithosphere beneath Luoyang-Yichuan-Shiyan-Zigui, Qinling, China. Acta Petrologica Sinica, 11(2): 227- 241(in Chinese with English Abstract)
    Wang, F. Z., Lu, F. X., Zhu, Q. W., 1997. Discussion on Inhomogeneity of Upper Mantle along Quanzhou(in Fujian)Heishui(in Sichuan)Geoscience Transect. China University of Geosciences Press, Wuhan. 118- 136(in Chinese with Engish Abstract)
    Zhao, Z. D., Zhang, B. R., Gao, S., 1996. The Geochemical Map of Orogenic Zone, Qinling. Science Press, Beijing(in Chinese)
    Zhou, X. R., Wang, F. Z., 1987. The Physical Chemistry of Petrology. Henan Science and Technology Press, Zhengzhou. 326- 327(in Chinese)
    Zheng, Y. F., 1999. The Geochemical Kinetics. Science Press, Beijing. 15- 27, 168- 262, 334- 358(in Chinese)
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索

    Tables(1)

    Article Metrics

    Article views(1232) PDF downloads(21) Cited by()
    Proportional views
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return