Xinjiang Petroleum Geology ›› 1997, Vol. 18 ›› Issue (4): 307-312.

• GEOLOGICAL EXPLORATION • Previous Articles     Next Articles

DISCOVERY OF DICKITE AND ITS SIGNIFICANCE IN WEATHERING CRUST OF LOWER ORDOVICIAN, SOUTHWEST DEPRESSION IN TARIM BASIN

Zhao Xingyuan   

  1. Tarim Petroleum Exploration and Development Headquarters, Korla, Xinjiang 841000
  • Received:1996-12-18 Online:1997-12-01 Published:2021-01-18
  • About author:Zhao Xingyuan, Female, Senior Engineer, Clay Mineral

Abstract: Dickite were only found in dolomite denudation pore in weathering crust(Lower Ordovician) in Shaanxi-Gansu-Ningxia and Tarim basins. Developing state of dickite directly reflects development and conectivity of denudation pore when it is formed and temperature condition of overlying formation, so studying dickite is very impotant to oil/exploration. Discovery of dickite in Tarim basin indicates that Lower Ordovician weathering crusts in westem Tarim basin(especially in Bachu-Maigaiti) are the most favourable area for gas accumulation.

Key words: Tarim basin, Early Ordovician, Weathering crust, Kaolinite, Isomer, Natural gas, Reservoir