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1·Iron carbonate, FeCO3, as is siderite. always brown.

与菱铁矿一样，是碳酸亚铁FeCO3。褐色。

2·And then studied the origin and lithofacies meaning of siderite.

在此基础上研究了菱铁矿的成因和岩相意义。

3·Too much CO2, and magnetite can't form, whereas the opposite is true for siderite.

如果大气中存在的二氧化碳太多，磁铁矿则无法形成；

4·Especially emphasizes that siderite has no apparent effect on formation resistivity.

特别强调指出局部发育的菱铁矿对该区地层电阻率无明显影响。

5·Thereby the scientific basis for developing and utilizing the low grade siderite were provided.

从而为开发利用低品位矿提供了理论依据。

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

黄铁矿、菱铁矿变为褐铁矿、赤铁矿和针铁矿。

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

黄铁矿、菱铁矿变为褐铁矿、赤铁矿和针铁矿。

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

一种常见的氧化铁矿石，是针铁矿、赤铁矿和纤铁矿的混合物。

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

对赤铁矿、假像赤铁矿、镜铁矿、褐铁矿、菱铁矿、锰矿、铬铁矿等的分选。

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

织金煤田西南矿区龙潭组、长兴组广泛发育菱铁矿层。

菱铁矿

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

氧化焙烧是解决低品位复杂难选菱铁矿的有效前处理工艺，氧化焙烧参数对焙烧效果影响很大。

2·And then studied the origin and lithofacies meaning of siderite.

在此基础上研究了菱铁矿的成因和岩相意义。

3·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.

矿物成分分析显示，岩石中主要含铁矿物为磁铁矿、磁赤铁矿、赤铁矿、黄铁矿和菱铁矿。

4·From microscopic examination of rocks and minerals, the author analyzed morphological characteristics and occurrence status of siderite in Tongziyan Formation, Longyong Coalfield.

从岩矿镜下鉴定资料入手，分析了龙永煤田童子岩组菱铁矿的形态特征和赋存状况。

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

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。