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The trace elements, rare earth elements (REE), carbon and oxygen isotopic compositions and strontium isotopes were analyzed to study systematically the geochemical characteristics and origin of the middle assemblage dolomites from the Ordovician Majiagou Formation Member 5 in the Jingxi area (the west of Jingbian Gas Field), Ordos Basin. The analytical results of samples demonstrate that the MgO and...
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