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Article Navigation >  Acta Sedimentologica Sinica  > 2004  >  22(1): 1-5

HUANG Si jing, SHI He, ZHANG Meng, WU Wen hui, SHEN Li cheng. Application of Strontium Isotope Stratigraphy to Dating Ordovician Marine Sediments——An case study from the well Tazhong 12 in Tarim basin[J]. Acta Sedimentologica Sinica, 2004, 22(1): 1-5.
Citation: HUANG Si jing, SHI He, ZHANG Meng, WU Wen hui, SHEN Li cheng. Application of Strontium Isotope Stratigraphy to Dating Ordovician Marine Sediments——An case study from the well Tazhong 12 in Tarim basin[J]. Acta Sedimentologica Sinica, 2004, 22(1): 1-5.
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Application of Strontium Isotope Stratigraphy to Dating Ordovician Marine Sediments——An case study from the well Tazhong 12 in Tarim basin

  • State Key Laboratory of Oil/Gas Reservoir Geology and Exploitation, Collegeof Geoscience, Chengdu Universityof Technology, Chengdu 610059

  • Received Date: 2003-03-16
  • Publish Date: 2004-03-10
  • According to the principle of strontium isotope stratigraphy (SIS), we establish the Ordovician data baseof 87 Sr/ 86 Sr ratio through the geological timefrom the digitized global marine strontium isotope curve. We have confirmed the boundaries of middle upper and middle lower Ordovicianusing the analytic data of strontium isotope of the Well Tazhong 12 in Tarim basin.The two boundaries are located atthe depth of 5 120 m ( 87 Sr/ 86 Sr≈ 0.708 8,with theage of 465 Ma)and4 880 m( 87 Sr/ 86 Sr≈ 0.708 2,with theage of 455 Ma),respectively, of the Well Tazhong 12. The verificationof middle upper Ordovicianboundary is just the first time for this well,and the location of the boundary of middle lower Ordovician confirmed is consistent with the depth of middle upper Ordovician boundary calibratedby conodontdata.This variation of strontium isotope curve for the Well Tazhong 12 shows the following facts: despite the tectonic movementresulted in the rising of Tarim basin, leading to the leaching of meteoricwater to the upper most part of Ordoviciancarbonate, and to the increase of 87 Sr/ 86 Sr of some samples, the relationship between Ordovicianand its upper strata of the Well Tazhong 12 is transitionary. The top boundary for Ordovicianis located at the depth of 4 650 m ( 87 Sr/ 86 Sr≈ 0.707 9,with theage of 435 Ma).
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  • Received:  2003-03-16
  • Published:  2004-03-10

Application of Strontium Isotope Stratigraphy to Dating Ordovician Marine Sediments——An case study from the well Tazhong 12 in Tarim basin

  • State Key Laboratory of Oil/Gas Reservoir Geology and Exploitation, Collegeof Geoscience, Chengdu Universityof Technology, Chengdu 610059
  • Received Date: 2003-03-16
  • Publish Date: 2004-03-10

Abstract: According to the principle of strontium isotope stratigraphy (SIS), we establish the Ordovician data baseof 87 Sr/ 86 Sr ratio through the geological timefrom the digitized global marine strontium isotope curve. We have confirmed the boundaries of middle upper and middle lower Ordovicianusing the analytic data of strontium isotope of the Well Tazhong 12 in Tarim basin.The two boundaries are located atthe depth of 5 120 m ( 87 Sr/ 86 Sr≈ 0.708 8,with theage of 465 Ma)and4 880 m( 87 Sr/ 86 Sr≈ 0.708 2,with theage of 455 Ma),respectively, of the Well Tazhong 12. The verificationof middle upper Ordovicianboundary is just the first time for this well,and the location of the boundary of middle lower Ordovician confirmed is consistent with the depth of middle upper Ordovician boundary calibratedby conodontdata.This variation of strontium isotope curve for the Well Tazhong 12 shows the following facts: despite the tectonic movementresulted in the rising of Tarim basin, leading to the leaching of meteoricwater to the upper most part of Ordoviciancarbonate, and to the increase of 87 Sr/ 86 Sr of some samples, the relationship between Ordovicianand its upper strata of the Well Tazhong 12 is transitionary. The top boundary for Ordovicianis located at the depth of 4 650 m ( 87 Sr/ 86 Sr≈ 0.707 9,with theage of 435 Ma).

HUANG Si jing, SHI He, ZHANG Meng, WU Wen hui, SHEN Li cheng. Application of Strontium Isotope Stratigraphy to Dating Ordovician Marine Sediments——An case study from the well Tazhong 12 in Tarim basin[J]. Acta Sedimentologica Sinica, 2004, 22(1): 1-5.
Citation: HUANG Si jing, SHI He, ZHANG Meng, WU Wen hui, SHEN Li cheng. Application of Strontium Isotope Stratigraphy to Dating Ordovician Marine Sediments——An case study from the well Tazhong 12 in Tarim basin[J]. Acta Sedimentologica Sinica, 2004, 22(1): 1-5.
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