Multiphase dolomitization in the Jutana Formation (Cambrian), Salt Range (Pakistan): Evidences from field observations, microscopic studies and isotopic analysis
作者: S. KhanM.M. Shah
作者单位: 1Quaid-i-Azam University, Islamabad&Geosciences Advanced Research Lab. (GARL), Geological Survey of Pakistan, Islamabad (Pakistan)
2Quaid-i-Azam University, Islamabad
刊名: Geologica Acta, 2019, Vol.17 , pp.1-18
来源数据库: Universitat de Barcelona
DOI: 10.1344/GeologicaActa2019.17.2
关键词: Cambrian dolomiteSalt RangeDiagenetic phasesO/C isotopesMg-isotopes.
原始语种摘要: Excellent dolomite exposures are observed in the eastern Salt Range (Pakistan), where the Cambrian Jutana Formation consists of two distinct units (i.e. oolitic – pisolitic unit and massive dolomite unit). Field observations revealed that the lower, oolitic-pisolitic unit mostly comprises medium to thick bedded, interlayered brown yellowish dolostone containing ooids/pisoids and faunal assemblages, and grey whitish sandstone with distinct depositional sedimentary features (i.e. trough-, herringbone- and hhummocky crossbedding). The upper massive dolostone unit consists of thick bedded to massive dolostone. These two units are separated by shale. Petrographic studies identified three dolomite types, which include: fine crystalline dolomite (Dol. I), medium-coarse crystalline...
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  • dolomitization 白云石化
  • Cambrian 寒武纪的
  • dolomite 白云石
  • Pakistan 巴基斯坦
  • dolostone 白云岩
  • oolitic 鲕状的
  • pisolitic 豆状的
  • isotopic 同位素置换
  • diagenetic 成岩作用的
  • depositional 沉积作用的