变质矿床

变质矿床成因分类的讨论

Discussion of genetic classification of metamorphic deposits

鞍山小岭子铁矿系沉积变质矿床，铁矿物嵌布粒度细，磁性率低，属较难选铁矿。

Anshan Xiaolingzi iron ore belongs to the sedimentary metamorphic iron deposits with characteristics of fine iron minerals and low magnetic rate , and it is a refractory iron ore.

文章在介绍Kokchetav变质金刚石矿床的地质特征和大地构造背景的基础上，讨论了该变质金刚石矿床的形成过程以及变质金刚石的成因。

Based on descriptions of the geology and the tectonic background of this metamorphic diamond deposit , this paper discusses the ore-formation processes and the origin of the metamorphic diamond .

厂坝铅锌矿床为一层控型沉积-动热变质改造矿床。

The Changba Pb-Zn ore deposit being located in Gansu province belongs to the strata-bound sedimentation-dynamothermal deformation type .

由于锰本身地球化学性质的限制，在自然界只受氧化物和碳酸盐类等几种类型控制，具经济意义的锰矿床是沉积（变质）矿床和表生（残余）矿床。

The manganese only has some oxide and carbonate type in nature by control with it 's geochemistry characteristic .

变质型矿床，金红石自然颗粒主要为单晶、粒度较细、分布均匀，随着变质温压降低、粒度有明显变小趋势；

The natural grain of rutile from metamorphism-typed deposits is mainly monocrystal with a comparatively thin grain size , even thinner with progressively decrease in metamorphic temperature .

铁矿成因类型较多，主要类型单一，全球以沉积变质型矿床为主；

Iron ores have a diversified genesis but sole in major category , displaying as sedimentary-metamorphic deposits globally and as sedimentary-metamorphic deposits and magmatic deposits in China .

大理岩型红宝石矿床是变质红宝石矿床的重要工业类型，是目前世界上优质饰用红宝石的主要来源。

The ruby deposit of marble type is an important industrial type of metamorphic ruby deposit and the predominant source of high quality decoration ruby in the world today .

文章以区域成矿条件，矿床地质特征为基础，根据对矿石微量元素组分分析、硫同位素特征研究认为，矿床成因应属海相火山喷发-沉积受变质改造矿床。

Studies on regional ore-forming condition , characteristics of the ore deposit , micro-element of ore and S isotopes show that the deposit is a metamorphosed marine volcanic eruption-sedimentary Fe deposit .

矿床成因类型包括热水喷流沉积型矿床、与岩体有关的中低温热液脉型矿床、矽卡岩型矿床，块状硫化物型矿床、沉积变质型矿床等。

Genesis types include sedimentary exhalative deposits , medium-low temperature hydrothermal vein-type deposits and skarn-type deposits which are related to intrusions , massive sulfide deposit , sedimentary-metamorphic deposits , and so on .

详细论述了自然金、银金矿成色与金矿形成时代、成矿深度、压力、温度以及矿化阶段、变质程度、矿床类型、溶液的pH值、Eh值等的关系。

The paper goes into details on the relation of the fineness of gold and electrum with gold metallogenetic epoch , depth , pressure and temperature , stages of mineralization , degree of metamorphism , deposit type and pH & Eh values of solution .

成矿作用与构造活动同步，属动力变质热液矿床类型。

Metallization , which took place synchronously with the tectonic activity , belongs to the hydrothermal deposit of dynamic metamorphism .

变质蚀变型矿床，金红石自然颗粒主要为集合体、粒度粗、局部富集。

On the contrary , metamorphism plus alteration typed deposits yield aggregative grains of rutile , having a relatively thick grain size .

按金铀矿床的成因类型可划分为：1.变质砾岩型Au-U矿床，2.沉积角砾岩型Cu－U－Au矿床；

According to their genesis , Au-U ore deposits may be divided into six types : ( 1 ) metamorphic conglomerate Au-U type ore deposits ; ( 2 ) sedimentary breccia Cu-U-Au type ;

热液变质煤与金属矿床的关系

A primary study on the relation of hydrothermal metamorphosed coals to metallic ore deposits

接触变质型硅灰石矿床地质特征及其成矿机理的研究

Geological features of the contact metamorphic type wollastonite deposit and its study on metallogenic mechanism

这类变质超基性岩的矿床，具有规模大，埋藏浅，易采易选又有多种矿产可供综合利用等一系列优点。

Deposits of this type are characterized in big scale , shallow depth , and great commercial significance .

经岩石化学及微量元素等的研究表明，这是一个由贫硅富铝的沉积岩经高级变质作用形成的矿床。

Based on the investigation by petrochemistry and trace elements , It is regarded that this corundum deposit are formed by metamorphism from the sedimentary rocks riched in aluminium .