1) spherical magnetite
球状自生磁铁矿
2) Spherical sulfur ore
球状黄铁矿
3) ball ironstone
球状铁矿石
4) oolitic-magnetite
鲕状磁铁矿
1.
Magnetic processing technology experimental research of oolitic-magnetite
难选鲕状磁铁矿磁选工艺试验研究
5) spherulitic Fe-minerals
球粒状铁质矿物
6) authigenic pyrite
自生黄铁矿
1.
The intervals around 500 cm of Core HD196A are enriched in authigenic pyrites, showing a rich zone of pyrites.
自生黄铁矿是海洋沉积物缺氧硫酸盐还原过程的主要产物。
2.
To understand better the response of authigenic minerals in sediments of the gas hydrate system,total 652 sediment samples recovered from IODP 311 Expedition were washed and all authigenic pyrites were picked up.
对综合大洋钻探计划(IODP)311航次652个岩心沉积物样品进行了自生黄铁矿颗粒筛选、显微形貌特征及其硫稳定同位素组成等初步研究。
3.
The co-existence of ACP and authigenic pyrites and their preferential occurrence in the sand-veins indicate that they resulted from the anaerobic oxidation of methane(AOM)and bacterial sulfate reduction(BSR)happened in a sulfate-methane transition zone(SMTZ)few centimeters below the sedimentary surface.
在砂脉和相邻围岩中发现有自生碳酸盐沉淀和自生黄铁矿。
补充资料：磁铁矿
| 磁铁矿 magnetite 成分为铁的氧化物(Fe3O4)的矿物。含铁量72.4％，是重要的铁矿石矿物，有时可直接用于平炉炼钢。若伴有钛、钒、铬等元素，可综合利用。可作为中药，具镇静安神功效。等轴晶系，晶体磁铁矿石标本常呈八面体，菱形十二面体。集合体呈块状或粒状。铁黑色，半金属光泽，莫氏硬度5.5～6.5，比重5.2。具磁性。分布广，有多种成因，如瑞典的基鲁纳为典型的岩浆矿床，智利的拉科磁铁矿是与火山作用有关的含铁矿浆直接溢出而形成。主要是由规模大、品位较低的沉积变质作用形成的，它常与赤铁矿一起产出。在海滨或河床中也常富集。
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参考词条