Carbonates and Evaporites

, 12:177 | Cite as

Two ordovician unconformities in North China: Their origins and relationships to regional carbonate-reservoir characteristics

  • Bo Liu
  • Ying-hua Wang
  • Xiang-lin Qian


The two unconformities developed on the tops of the Lower Ordovician Liangjiashan Formation (UF1) and the Middle Ordovician Majiagou- or Fengfeng Formation (UF2) are essential boundaries that controlled the formation and distribution of the Lower Paleozoic karst-related reservoirs. UF1 and UF2 have been interpreted as representing short-and long-terms of tectonic uplift, respectively, but new evidence led us to conclude that they were created by different original mechanisms and therefore the related reservoirs should be predicted in different ways. UF1 was commonly interpreted as the result of southern upwarping of the basement, but sequence-stratigraphic analysis supports its origin by eustatic sea-level changes. Spatially, the most favorable regional reservoirs controlled by UF1 should be located in the central area of North China, where the carbonate sediments experienced intensive shallow-subsurface dolomitization with following meteoric water leaching. UF2 was created by tectonic event which resulted in an intra-plate downward flexure and subsequent peripheral bulge. In the depression belt of central North China the younger strata (Fengfeng Fm) wer proted, but along the bulge meteoric water eroded them. As a result, the potential regional reservoirs related to UF2 are likely to be distributed along the peripheral-uplift belts, especially around the remnant of the Fengfeng Formation. Based on the analysis of these two unconformities, the Early Paleozoic tectono-sedimentary evolution of North China Plate can be largely divided into four stages: (1)the Cambrian Period, characterized by eustatic-sea-level rise and tectonic subsidence; (2)early stage of the Early Ordovician, characterized by eustatic-sea-level fall exceeding tectonic subsidence and development of UF1;(3)from the late stage of the Early Ordovician to the Middle Ordovician, featured by eustatic-sea-level rise and slow tectonic subsidence; (4)from the late stage of the Middle Ordovician to the Early Carboniferous, distinguished by vigorous tectonic uplift and development of UF2.


Cambrian Ordovician Unconformity Dolomitization Ordo Basin 


  1. AN, TAIXIANG, ZHANG, FANG, XIANG, WEIDA, WHANG, YUQEU, WU, WENHOW, ZHANG, HUIJUAN, JIANG, DEBIAO, YANG, CHANGSHEN, LAN, LIANDI, CUE, ZHANGTANG, and YANG, XINGCHANGE, 1983, Conodonts in N China and Adjacent Areas. Science Press, Beijing, 223 p. (in Chinese).Google Scholar
  2. BATES, R.L. and JACKSON, J.A. (eds), 1980, Glossary of Geology. Falls Church. Virginia, American Geological Institute, 749 p.Google Scholar
  3. CATER, J.M.L. and JILLERIST, J.R., 1994, Karstic Reservoirs of the Mid-Cretaceous Mardin Group, SE Turkey: tectonic and eustatic controls on their genesis, distribution and preservation:Journal of Petroleum Geology, v. 17, p. 253–278.CrossRefGoogle Scholar
  4. CHEN, XIA and XU, HUI 1994, The distribution and genetic types of the Ordovician Carbonate reservoirs in the North China Platform:Acta Sedimentologica Sinica, v. 12, p. 47–55, (in Chinese with English abstract).Google Scholar
  5. CHENOWETH, P.A., 1967, Unconformity analysis:The American Association of Petroleum Geologists Bulletin, v. 51, p. 4–27.Google Scholar
  6. DEN, QINGLU and YANG, WEIRAN, 1996, The Early Paleozoic “open” and “closure” structural framework of Qinlin Orogen and Caledonian Movement:Geological Sciences and Technology Information, v. 15, p. 45–54, (in Chinese with English abstract).Google Scholar
  7. DUNBAR, C.O. and RODGERS, J., 1957, Principles of Stratigraphy. Wiley, New York, 356 p.Google Scholar
  8. FEN, ZHENGZHAO 1990, The Early Paleozoic Lithofacies-Paleogeography of the North China Platform. Geology Press, Beijing, 270 p.,(in Chinese with detailed English abstract).Google Scholar
  9. FRIEDMAN, G.M., 1994, Upper Cambrian-Later Ordovician (Sauk) platform carbonates of the Northern Appalachian (Gondwana) passive margin:Carbonates and Evaporites, v. 9, p. 143–150.CrossRefGoogle Scholar
  10. JACOBI, D.R., 1981, Peripheral bulge-a causal mechanism for the Lower/Middle Ordovician unconformity along the western margin of the Northern Appalachians:Earth and Planetary Science Letters, v. 56, p. 245–251.CrossRefGoogle Scholar
  11. JING, ZHENKUI and FENG, ZENGZHAO, 1993, Types and reservoiring performance of dolostones of the Lower Paleozoic in the eastern North China Platform:Acta Sedimentologica Sinica, v. 11, p. 11–18, (in Chinese with English abstract).Google Scholar
  12. JOACHIMSKI, M.M., 1994, Subaerial exposure and deposition of shallowing upward sequences: evidence from stable isotopes of Purbeckian peritidal carbonates (basal Cretaceous), Swiss and French Jura Mountains:Sedimentology, v. 41, p. 805–824.CrossRefGoogle Scholar
  13. KRUMBEIN, W.C. and SLOSS, L.L., 1963, Stratigraphy and Sedimentation. W.H. Freeman and Company, San Francisco, 660 p.Google Scholar
  14. LISHITIAN, ET AL., 1995, The Mesozoic sequence stratigraphy and tectono-stratigraphic analysis of the Ordos BasinIn Wang, Y., Bao, Z., and Zhu, Y., (eds), The New Development on Sedimentology and Lithofacies-Paleogeography Press of Petroleum Industry, Beijing, p. 390–392, (in Chinese).Google Scholar
  15. LIU, BO and WANG, YINGHUA, 1995, The interpretation of the Lower Paleozoic reservoirs based on sequence stratigraphy, North China,In Wang, Y., Bao, Z., and Zhu, Y., (eds), The New Development on Sedimentology and Lithofacies-Paleogeography. Press of Petroleum Industry, Beijing, p. 366–368, (in Chinese).Google Scholar
  16. MIALL, A.D., 1984, Principles of Sedimentary Basin Analysis. Springer-Verlag, New York, 490 p.Google Scholar
  17. MILLER, E.G., 1972, Parkman field, Williston basin, Saskatchewan,In King, R.E., (ed), Stratigraphic Oil and Gas Fields-Classification, Exploration Methods and Case Histories:American Association of Petroleum Geologists Memoir, v. 16, p. 502–510.Google Scholar
  18. MONG, XIANGHUA, 1979, Analysis on the Sedimentary Formations and Associated Ore- Deposits, Geology Press, Beijing, 135 p., (in Chinese).Google Scholar
  19. MUSSMAN, W.J. and Read, J.F., 1986, Sedimentology and development of a passive-to convergent-margin unconformity: Middle Ordovician Knox unconformity, Virginia Appalachians:Geological Society of America Bulletin, v. 97, p. 282–295.CrossRefGoogle Scholar
  20. NANJING INSTITUTE OF GEOLOGY AND PALEONTOLOGY, CHINESE ACADEMY OF SCIENCES, 1982, Stratigraphic Correlation Charts in China with Explanatory Text. Science Press, Beijing, 298 p. (in Chinese).Google Scholar
  21. NICKEL, E., 1982, Alluvia-fan carbonate facies with evaporites, Eocene Guarga Formation, Southern Pyrenees, Spain:Sedimentology, v. 29, p. 761–796.CrossRefGoogle Scholar
  22. ROSS, J.R.P. and ROSS, C.A., 1992, Ordovician sealevel fluctuations,In Webby and Laurie (eds), Global Perspective on Ordovician Geology. Balkema, Rotterdam, p. 327–335.Google Scholar
  23. SALLER, H.A., BUDD, A.D. and HARRIS, M.P., 1994, Unconformities and porosity development in carbonate strata: ideas from a Hedberg Conference:American Association of Petroleum Geologists Bulletin, v. 78, p. 857–872.Google Scholar
  24. SANDERS, J.E., 1982, Petroleum in unconformity traps: from Kerogen intruncated permeable wedge? p. 77–91,in Halbouty, M.T. (ed), The deliberate search for the subtle trap, Tulsa, OK:American Association of Petroleum Geologists Memoir, v. 32, 351 p.Google Scholar
  25. SHANMUGAM, G., 1988, Origin, recognition and importance of erosional unconformities in sedimentary basins.In Kleinspehn, K.L and Paola, C., (eds), New Perspectives in Basin Analysis. Springer-Verlag, New York, p. 83–108.Google Scholar
  26. SHEN, XINGFU, 1974, Classification and Correlation of Ordovician in China. Geology Press, Beijing, 153 p. (in Chinese).Google Scholar
  27. SLOSS, L.L., 1984, Comparative anatomy of cratonic unconformities, p. 1–6,in Schlee, J.S., (ed), Interregional unconformities and hydrocarbon accumulation, Tulsa, OK:American Association of Petroleum Geologists Memoir, v. 36, 184 p.Google Scholar
  28. SUN, S.Q., 1995, Dolomite reservoirs: porosity evolution and reservoir characteristics:American Association of Petroleum Geologists Bulletin, v. 79, p. 186–204.Google Scholar
  29. TUCKER, M.E., 1993. Carbonate diagenesis and sequence stratigraphy.In Wright, V.P., (ed), Sedimentology Review/1, Blackwell, London, p. 51–72.CrossRefGoogle Scholar
  30. VAIL, P.R., HARDENBOL, J., and TODD, R.G., 1984, Jurassic unconformities, chronostratigraphy, and sealevel changes from seismic stratigraphy and biostratigraphy.In Schlee, J.S., (ed), Interregional Unconformities and Hydrocarbon Accumulation:American Association of Petroleum Geologists Memoir, v. 36, p. 129–144.Google Scholar
  31. VAIL, P.R. and MITCHUM, R.M., Jr., 1977, Seismic stratigraphy and global changes of sea level, Part 1: Overview.In Payton, C.E. (ed), Seismic Stratigraphy-Applications to Hydrocarbon Exploration:American Association of Petroleum Geologists Memoir, v. 26, p. 51–52.Google Scholar
  32. WANG, DEYOU and ZHANG, ENHUI, 1992, Lithofacies-paleogeography and environment control over the lead-zinc ore deposits in Henan Province during the Early Cambrian. Press of China University of Geosciences, Beijing, 154 p. (in Chinese with English abstract).Google Scholar
  33. WANG, YINGHUA, 1992, Carbonate diagenesis and porosity evolution:Acta Sedimentologica Sinica, v. 10, p. 85–93, (in Chinese with English abstract).Google Scholar
  34. WANG, YINGHUA, ZHANG, XUELIAN and YANG, CHENYUN, 1989, Petrology of Early Paleozoic Carbonate Rocks in the North China Platform. Seismology Press, Beijing, 144 p., (in Chinese).Google Scholar
  35. XU, XIAOSHONG, 1995, The remarks of unconformable sequence boundaries and basin natures.In Wang, Y., Bao, Z., and Zhu, Y., (eds), The New Development on Sedimentology and Lithofacies-Paleogeography. Press of Petroleum Industry, Beijing, p. 442–445, (in Chinese).Google Scholar

Copyright information

© Springer 1997

Authors and Affiliations

  • Bo Liu
    • 1
  • Ying-hua Wang
    • 1
  • Xiang-lin Qian
    • 1
  1. 1.Geology DepartmentPeking UniversityBeijingPR China

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