X-ray studies show that carbonate minerals are aragonite, high-Mg calcite, and lesser dolomite, ankerite and siderite. 2. Rich magnesium calcite organism accumulation zone, whose depth distribution ranges from 60-400m;

  • 碳酸盐岩中自生碳酸盐矿物主要为文石、高镁方解石,少量白云石、铁白云石和菱铁矿。镁方解石质生物富积带(60-400m);

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