STUDY ON A STOREHOUSE OF ULTRAHIGH PRESSURE MANTLE MINERALS──PODIFORM CHROMITE DEPOSITS
STUDY ON A STOREHOUSE OF ULTRAHIGH PRESSURE MANTLE MINERALS──PODIFORM CHROMITE DEPOSITS
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作者：
Bai Wen-ji
罗布沙蛇绿岩体沿印度河-雅鲁藏布缝合带生长，位于拉萨东南约200km处，含一组地幔矿物。罗布沙地块主要由地幔辉石、堆积岩和蛇纹岩混杂岩组成。在罗布沙蛇绿岩幔尖辉石中发现了一组深地幔矿物，其中含金刚石矿物约60~70种。本文介绍了脚状铬铁矿中的几种重要矿物，如金刚石、莫矽石、富铬铬铁矿、富硅辉长辉石、富镁橄榄石、锆石、硅镁尖晶石、八面体硅酸盐和含水硅酸盐微爆。上述矿物的信息对深部地幔的研究具有重要意义。天然元素：金刚石、石墨、金、铜、铁、镍、硅、铬、铝、钨、锌、铅、锡；铂族矿物:铱锇矿,铱锇矿、Ir-Os-Ru Os-Ir, Ir-Ru, Ir-Os-sulfide;合金:FeSi,芬尼酒,原文如此,CrC,网卡,NiCrC, Ag-Au, Au-Ag, Ag-Sn, AlFe, IrFe, NiFeCr, NiIrFe,选举委员会,Fe-Pt-Pd;硫化物:黄铁矿、毒砂、镍黄铁矿、闪锌矿、方铅矿,matraite;氧化物:铬铁矿、chrundum金红石、方镁石wuestite, (MnFe) O、SiO 2,曹;磷酸盐:磷灰石;硫酸盐:天青石;硅酸盐：橄榄石、顽辉石、铬透辉石、锆石、榍石、硅磁石、菱辉石、硅灰石、角闪孔、白云母、黑云母、绿云母、绿云母、铁绿石、铁绿石、蛇纹石、八面体仿蛇纹石、八面体仿绿泥石；碳酸盐：白云石、方解石。
The Luobusha ophiolitic body containing a group of mantle minerals crops out along the Indu-Yarlunzangbu suture zone, and lies about 200km to the southeast of Lhasa. The Luobusha massif consists predominantly of mantle harzburgite, cumulate and serpentinite melange. A group of deep mantle minerals including about 60～70 kinds of minerals containing diamond has been discovered in podiform chromite deposits in the Luobusha ophiolitec mantle harzburgite. In this paper,the authors introduce several important minerals in podiform\|chromite ores, such as diamond, moissanite, Cr-rich chromite, Si-rich enstatite, Mg-rich olivine, zircon, Si-Mg spinel, octahedral silicate and micro-explosion of hydrous silicate. The information on the above minerals is of significance for study of deep mantle. About 60-70 kinds of the minerals are in the list:Native elements:diamond,graphite,gold,copper,iron,nickle,silicon,chromium,alumium,tungsten,zinc,lead,tin;PGE minerals:iridosmine,osmiridium,Ir-Os-Ru,Os-Ir,Ir-Ru,Ir-Os-sulfide;Alloys:FeSi,FeNi,SiC,CrC,NiC,NiCrC,Ag-Au,Au-Ag,Ag-Sn,AlFe,IrFe,NiFeCr,NiIrFe,FeC,Fe-Pt-Pd;Sulphides:pyrite,arsenopyrite,pentlandite,sphalerite,galena,matraite;Oxides:chromite,chrundum,rutile,periclase,wuestite,(MnFe)O,SiO 2,CaO;Phosphates:apatite;Sulfates:celestite;Silicates:olivine,enstatite,Cr-diopside,zircon,sphene,sillimantite,gehlenite,wollastonite,amphibole,muscovite,biotite,phlogopite,uvarovite,almandine,Cr-chlorite,serpentite,octehedral psuedomorph serpentine,octehedral psuedomorph chlorite;Carbonates:dolomite,calcite.