1. Calcite, siderite, barite and others don't contain gold.

2. Siderite is vastly developed in the Longtan, Changxing formations in southwestern mine area, Zhijin coalfield.

3. IV. carbonate mineral contain iron , include siderite, ankerite, etc.

4. The pyrite and siderite associated with the ores have been oxidized into limonite, hemitite and goethite.

5. They focused on two minerals, magnetite and siderite, that can provide a bellwether of the CO2 concentrations in the atmosphere.

6. During metamorphization the siderite is transformed into magnetite under the action of high temperature and high pressure, while other Fe-bearing carbonate rocks are changed in to skarns.

7. Mineral resources of coal, red siderite, limonite, chromite, gold, copper, limestone, gypsum and so on.

8. Under weathering carbonates, such as siderite are usually turned into limonite which finally occur as hematite in the Weathering crusts.

9. The composition analysis of five-component mixed minerals of siderite, kaolinite, dolomite, calcite and quartz has been analyzed inN_2.

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10. To separate hematite, supposed hematite, specularite, limonite, siderite, manganese ore, chromite and so on.

11. The siderite nodules formed in the early diagenetic stage under reduction conditions were found in the intersection parts of the Member 8 of Xiashihezi Formation.

12. Fe-carbonates include early ankerite-dolomite, ankerite and later siderite with calcite and quartz.

13. These results further indicate that the formation of the siderite concretions is not associated with the activity of methanogenic bacteria.

14. X-ray studies show that carbonate minerals are aragonite, high-Mg calcite, and lesser dolomite, ankerite and siderite.

15. The minerogenetic series of the Shanxi Formation mainly includes coal beds, followed by expanded clay and siderite.

16. The analysis of the iron bearing mineral compositions indicates that the major iron bearing minerals in the rocks are magnetite, maghemite, hematite, pyrite and siderite.

17. And then studied the origin and lithofacies meaning of siderite.

18. From microscopic examination of rocks and minerals, the author analyzed morphological characteristics and occurrence status of siderite in Tongziyan Formation[sentencedict.com], Longyong Coalfield.

19. The article indicates that there is genesisly relation between siderite ore and limonite ore.

20. Oxidation roasting was a pretreatment technique for low-grade and complex siderite, the parameters of oxidation roasting were important to roasting efficiency.

21. The results indicate that the jade mainly consists of illite and a small quantity of feldspar, quartz, hematite, siderite and rutile, which is argillaceous sedimentary rock.

22. C is mainly of ferromanganese carbonate series, and ? C mineral composition of sediments in the East Sea is dominated by siderite.

23. The main metallic mineral is specularite containing native gold and electrum. Surbordinate minerals are pyrite, chalcopyrite siderite and a very small amount of sulfosalt.