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Volume 12 Issue 2
Jun 2001
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Qingsheng Liu, Qifan Wu, Haixia Li, Tongjin Cheng, Xianghua Xia, LungS Chan, Shuang Zhang. Magnetic, Geochemical and Mineralogical Characteristics of Soils in Qiangtang Basin, Tibet, China: Implications for Prospective Oil and Gas Land. Journal of Earth Science, 2001, 12(2): 155-159.
Citation: Qingsheng Liu, Qifan Wu, Haixia Li, Tongjin Cheng, Xianghua Xia, LungS Chan, Shuang Zhang. Magnetic, Geochemical and Mineralogical Characteristics of Soils in Qiangtang Basin, Tibet, China: Implications for Prospective Oil and Gas Land. Journal of Earth Science, 2001, 12(2): 155-159.

Magnetic, Geochemical and Mineralogical Characteristics of Soils in Qiangtang Basin, Tibet, China: Implications for Prospective Oil and Gas Land

Funds:

National Natural Science Foundation of China 49874026

National Natural Science Foundation of China 49374216

Visiting Scholar Foundation of Key Lab in University of China 

  • Received Date: 25 Mar 2001
  • Accepted Date: 10 Apr 2001
  • The alterationof iron-bearing minerals induced by hydrocarbon microseepage above oil/gas reservoirs has been evaluated using measurements of soil magnetic susceptibility κ, geochemical compositions (gas hydrocarbon and alteration carbonateΔC), and composition and concentration of iron-bearing minerals.The analyses were performed along two profiles across the Qiangtang basininTibet, China: the Nuoermahu-Xuehuanhu profile (C)and the Mugar-i Huochetoushan profile (E).Results show that three strong magnetic anomalies (C1, E1 and E2anomalies)are related to the distribution of Neogene volcanic rocks onthe surface in the Gangmacuo-Xiyaergang uplift.Two other anomalies (C2and E4 anomalies), characterized by both moderately amplitude magnetic susceptibility and elevated soil gas hydrocarbons, occur near fault zones in the Cuoni-Donghu synclinorium.These latter anomalies display characteristics of hydrocarbon microseepage anomalies commonly associatedwithoil andgas accumulations.Theirpresence in the Cuoni-Donghu synclinorium suggests that parts ofthe Qiangtang basin may have significant petroleum potential.

     

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