Geologic Setting of Interformational BraidedChannel Type Sandstone Uranium Deposits              in North China   M. Zhu, ...
1. Basins and U Deposits in North China2. General Characteristics of U bearing  Mesozoic to Cenozoic Basins3. Geologic Set...
1.Basins and U Deposits in North China                                          Songliao Basin                   Turpan-Ha...
2. General Characteristics of U bearing Mesozoic to               Cenozoic Basins in North China            Area          ...
Uranium Mineralization Characteristics in Different Basins                      Braided          Braided          Braided ...
Sedimentation system of U ore-bearing formationYili           Tuha         Bayingebi      Erlian         Kailu            ...
3. Interformational Braided  Channel Type Sandstone Uranium  Deposits   Examples: Ordos Basin             Erlian Basin
*about 300,000 km2                  *A basin of energy resource3.1 Ordos Basin     coal, oil and nature gas               ...
3.1.1 Basin evolution                    Downfaulted basin                    Foreland basin                    Depression...
J 1-2Depression  basin  strata column
3.1.2 Unconformities in Jurassic         and between the J2 and K1Unconformity between J2z and J2y --- tectonic reversion
High resolution seismic profile in North Ordos                                  (after Zhu, 2010)
The lower uncomformity (J2z/J2y) andkaolinization in J2y (Yanan formation)         Dongsheng, North Ordos Basin           ...
3.1.3 Sedimentation system and faciesK1                                  Alluvial fan depositional system                 ...
Stratigraphic Column of Yan’an and Zhiluo Fms in Ordos                                 U                                 U
Zhiluo Fm (J2z)High sinuosity meandering river Low sinuosity meandering river                 Braided stream
Facies of low sinuosity meandering river                      Low sinuosity meandering river U                           U...
Section showing the sedimentation system         and facies in Dongsheng                    Alluvial fan depositional syst...
The composite profiles of Dongsheng deposit
3.1.4                   Bleaching of red bedsPossible relations ofhydrocarbon to Umineralization                          ...
Asphalt vein and U minerals in  Dongsheng    (BRIUG, 2004)
Concentration of Hydrocarbon in sandstone                      and ores in Dongsheng          CH4     C2H6     C3H8     i-...
1 6-1               1 2-1                                      0 4-1            0 1-1               0 5- 1             Q11...
asphalt veins                         Immersed oil    Immersed oilOil immersed features in various basins  A-Ordos ; B-Qia...
3.1.5 New Exploration sections in Husiliang area     Wuligemiao   Nalinguo   Caidenghao                                   ...
Large scale Braided channel system of Zhilou Formation in Husiliang area                           (Team No. 208, CNNC)
3.2 Erlian basin        --- Bayanwula Deposit                        (Christophe, 2012)
3.2.1 Stratigraphic Column in Erlian Basin
3.2.2 Sedimentation system in         Bayanwula    Saihan Fm        Braided    Braided        channel    channel
Flooding plain    (Red mudstone)Braided stream(Braided channel sand bodies) Fan delta (Lacustrine mudstone and distributar...
3.2.3 General characters of ore bodies   No. B335 exploration profile showing the tabular       ores in west part of Bayan...
155o    No. B319 exploration profile showing theroll-front ores in east part of Bayanwula deposit
l                                                    f                                                 – L                ...
3.2.4 Bayantala sag in Erlian basin          ----Huhe deposit                             (Christophe, 2012)
Geological map derivedfrom RS image (TM7,4,1)                          “Roof windows”-- the                          outcr...
Sedimentation characters of Saihan formation in HuheSaihantala Fm   Depositional     Lithological      Climate    Primary ...
Uranium mineralization in Huhe deposit• 200 to 300 m wide, 1600m long, buried at depths of 115 to 127m• Tabular or lenticu...
4. Conclusionsa. Three formation model       --- favorable for U mineralization•   Lower Fm: dark coal-bearing formation o...
b. favorable geological setting: tectonic  reversion of extension or depression basinc. Favorable sedimentation system: fl...
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05 xiaodong liu geologic setting of interformational-braided-channel type sandstone uranium deposits in north china

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Transcript of "05 xiaodong liu geologic setting of interformational-braided-channel type sandstone uranium deposits in north china"

  1. 1. Geologic Setting of Interformational BraidedChannel Type Sandstone Uranium Deposits in North China M. Zhu, R. Wu, X. Liu, F. Nie, D. Yu East China Institute of Technology 2012/05/29
  2. 2. 1. Basins and U Deposits in North China2. General Characteristics of U bearing Mesozoic to Cenozoic Basins3. Geologic Setting of Interformational Braided Channel Type Sandstone Uranium Deposits -- Examples4. Conclusions
  3. 3. 1.Basins and U Deposits in North China Songliao Basin Turpan-Hami Basin Yili Basin Erlian Basin Bayingebi Basin Ordos Basin
  4. 4. 2. General Characteristics of U bearing Mesozoic to Cenozoic Basins in North China Area M.Basin Epoc Basin type Resource DepositsName 10 4 h s km 2 2.85 T-J Rift, depression, Coal+Oil+U 511, 512, 509 compression superposed Tuha 5.35 C2-T-J Tensional-depressional Coal+Oil+U Shihongtan piggyback basinBayinge- 12 Mz Strike slip-pull apart Oil+U Tamosu, bi basin Celaomiao Ordos 25 C-P-T Composite craton type Coal+Oil+U Dongsheng, (Foreland basin) Dongwan Erlian 10.9 J-K Tensional downfaulted- Coal+Oil+U Saihangaobi, depressional type Bayanwula Hailar 4.05 J-K Tensional downfaulted- Coal+Oil+U Kelulun, depressional type Chagannor Songliao 26 J3-K Tensional downfaulted- Coal+Oil+U Western slope depressional type Kailu 3.32 J3-K Tensional downfaulted- Coal+Oil+U Qianjiadian,
  5. 5. Uranium Mineralization Characteristics in Different Basins Braided Braided Braided channel channel channel Roll/tabular
  6. 6. Sedimentation system of U ore-bearing formationYili Tuha Bayingebi Erlian Kailu Lacus Lacus/ Lacus/ Braided Fluvial Fluvial channel Braided Delta Fan Braided Delta Fan Braided Delta Delta channel front
  7. 7. 3. Interformational Braided Channel Type Sandstone Uranium Deposits Examples: Ordos Basin Erlian Basin
  8. 8. *about 300,000 km2 *A basin of energy resource3.1 Ordos Basin coal, oil and nature gas *A large-scale sandstone-type U in Zhiluo Fm. of J2 in Dongsheng area, northeastern part of the basin.
  9. 9. 3.1.1 Basin evolution Downfaulted basin Foreland basin Depression basin Foreland basin
  10. 10. J 1-2Depression basin strata column
  11. 11. 3.1.2 Unconformities in Jurassic and between the J2 and K1Unconformity between J2z and J2y --- tectonic reversion
  12. 12. High resolution seismic profile in North Ordos (after Zhu, 2010)
  13. 13. The lower uncomformity (J2z/J2y) andkaolinization in J2y (Yanan formation) Dongsheng, North Ordos Basin (Jiao, 2010)
  14. 14. 3.1.3 Sedimentation system and faciesK1 Alluvial fan depositional system High sinuosity meandering river Fluvial depositional system Channel Flood plainJ2z Low sinuosity meandering river 河道沉积和 Channel 泛滥平原沉 积 Flood plain River island U Braided stream Braided channel UJ2y Delta depositional system
  15. 15. Stratigraphic Column of Yan’an and Zhiluo Fms in Ordos U U
  16. 16. Zhiluo Fm (J2z)High sinuosity meandering river Low sinuosity meandering river Braided stream
  17. 17. Facies of low sinuosity meandering river Low sinuosity meandering river U U U Braided stream channel sedimentation
  18. 18. Section showing the sedimentation system and facies in Dongsheng Alluvial fan depositional system High sinuosity meandering river Low sinuosity of meandering river Braided stream Delta depositional system
  19. 19. The composite profiles of Dongsheng deposit
  20. 20. 3.1.4 Bleaching of red bedsPossible relations ofhydrocarbon to Umineralization Oil immersed sandstone
  21. 21. Asphalt vein and U minerals in Dongsheng (BRIUG, 2004)
  22. 22. Concentration of Hydrocarbon in sandstone and ores in Dongsheng CH4 C2H6 C3H8 i-C4H10 n-C4H10 i-C5H12 n-C5H12 NoNormal 269.70 56.41 39.67 2.96 7.57 2.54 2.55 5S.Poor 346.59 77.64 33.13 4.04 7.89 3.18 3.29 3oresRich 1189.5 218.48 117.30 8.91 18.93 6.50 5.88 2ore ( Team No. 208, CNNC,2001)
  23. 23. 1 6-1 1 2-1 0 4-1 0 1-1 0 5- 1 Q11 50 50 Q 0 K2n-50 5 K2y2 4 3-100 2 K2y1 1-150 0 K2qn-200 F4 F3 0 200 400m Geochemistry of gray and red sandstone in Qianjiadian deposit in Kailu basin U CH 4 Eh Fe 2 O3 C 有 机 Samples -6 pH S% CO 2% ( × 10 ) (μ g/kg) (mv) / FeO (%) Gray S. 39 60.5 565.7 8.9 41.5 0.15 1.62 0.67 0.2 Red S. 15 2.1 147 9.6 17 0.02 1.30 5.26 0.01 Zhao, 2010
  24. 24. asphalt veins Immersed oil Immersed oilOil immersed features in various basins A-Ordos ; B-Qianjiadian ; C/D- Erlian Migration Hydrocarbon ?
  25. 25. 3.1.5 New Exploration sections in Husiliang area Wuligemiao Nalinguo Caidenghao Hantaimiao Dongsheng (Team No. 208, CNNC)
  26. 26. Large scale Braided channel system of Zhilou Formation in Husiliang area (Team No. 208, CNNC)
  27. 27. 3.2 Erlian basin --- Bayanwula Deposit (Christophe, 2012)
  28. 28. 3.2.1 Stratigraphic Column in Erlian Basin
  29. 29. 3.2.2 Sedimentation system in Bayanwula Saihan Fm Braided Braided channel channel
  30. 30. Flooding plain (Red mudstone)Braided stream(Braided channel sand bodies) Fan delta (Lacustrine mudstone and distributary channel ) Culomn of BZK127-0 drilling hole
  31. 31. 3.2.3 General characters of ore bodies No. B335 exploration profile showing the tabular ores in west part of Bayanwula deposit
  32. 32. 155o No. B319 exploration profile showing theroll-front ores in east part of Bayanwula deposit
  33. 33. l f – L f • Roll f of th collisJaireth et al. 2008 Genesis model for Bayanwula deposit
  34. 34. 3.2.4 Bayantala sag in Erlian basin ----Huhe deposit (Christophe, 2012)
  35. 35. Geological map derivedfrom RS image (TM7,4,1) “Roof windows”-- the outcrops of the Lower Cretaceous (K1b)
  36. 36. Sedimentation characters of Saihan formation in HuheSaihantala Fm Depositional Lithological Climate Primary Organic system assemblage color matterUpper member Meandering Mudstone Arid Variegated Deficient ( K1bs2 ) intercalated with color sandstoneLower member Braided Overlap of Warm Grey Abundant ( K1bs1 ) braided channel and sand bodies humid ores Tengge’er Fm -- fan delta
  37. 37. Uranium mineralization in Huhe deposit• 200 to 300 m wide, 1600m long, buried at depths of 115 to 127m• Tabular or lenticular in shape and 2.4 to 14m in thickness• Grade: 0.01%~0.074% No. 320 exploration profife of Huhe deposit
  38. 38. 4. Conclusionsa. Three formation model --- favorable for U mineralization• Lower Fm: dark coal-bearing formation of lacustrine• Middle Fm: grey sandstone formation of braided channel• Upper Fm: red mudstone formation of meandering stream two unconformities: between the lower and middle, and between the middle and upper
  39. 39. b. favorable geological setting: tectonic reversion of extension or depression basinc. Favorable sedimentation system: fluvial system braided channel to meandering system, but braided channel sandstone is the most important target for Ud. early-stage U mineralization: related to phreatic oxidation or interlayer oxidation.e. later-stage U mineralization: might related to migration hydrocarbon as the reductant along the faults or sandy strata ?
  40. 40. Thank you!

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