不透明矿物所含单个低盐度流体包裹体液相组分SAM/AES实验研究:Ⅰ.原理与方法     

魏春生  张国平  林清英  张燕征 《矿物学报》1996,(3)

针对与矿石矿物共存透明脉石矿物所含流体包裹体并不完全代表成矿流体，红外显微技术及EPMA、SEM等常规表面分析手段无法满足不透明矿石矿物所含单个低盐度流体包裹体研究的实际困难，本文首次成功地应用具同步扫描成象功能、电子束斑空间分辨率较高、信噪比较好的PHI595SAM／AES这一当代高灵敏表面分析技术，按单矿物分选→二次去离子水反复超声清洗→外真空热爆→在金属铟片上压制成样的实验流程对新疆阿尔泰多拉纳萨依金矿床含金黄铁矿所含单个低盐度流体包裹体的液相组成进行了静态定点分析，实验取得了满意结果。  相似文献   

江苏药用矿物资源初探   总被引：3，自引：0，他引：3  

钟启宝 《江苏地质》1996,20(3):177-180

江苏拥有丰富的药用矿物资源，大部分药用矿物均有产出。通过对药用矿物的分类，阐述了药用矿物的治疗机理和各自的实际功能。方位 为：江苏药有矿物资源的合理开发，不仅能为人类健康服务，而且也能产生可观的经济效益。  相似文献   

Magmatic arc metamorphism: petrology and temperature history of metabasic rocks in the Coastal Cordillera of northern Chile   总被引：6，自引：0，他引：6  

F. LUCASSEN  & G. FRANZ 《Journal of Metamorphic Geology》1996,14(2):249-265

We investigated the metamorphic cooling history of underplated magmatic rocks at midcrustal depth. Granulites and amphibolites occur within the Jurassic magmatic belt of the Coast Range south of Antofagasta in northern Chile between 23°25' and 24°20' S. The protoliths of the metamorphic rocks are basic intrusions of Early Mesozoic age. They are part of the magmatically formed crust, and the essentially dry magmas were emplaced in an extensional regime. The granulites (clinopyroxene–orthopyroxene–plagioclase) show all stages of fabric development from magmatic to granoblastic fabrics. Pyroxene compositions were reset at temperatures around 800°  C independent of the stage of textural equilibration. The granulites were partially amphibolitized at upper amphibolite facies temperatures of 600–700°  C. Following cooling, a possible reheating to greenschist facies temperatures around 500°  C is indicated by prograde zoning in magnetite–ilmenite pairs. Mineral assemblages are not suitable for barometry, but a conservative estimation of the garnet-in reaction at given whole-rock compositions suggests maximum pressures in the granulite facies of around 5 kbar, and similar pressures are indicated by phengite barometry for the greenschist facies. The P–T  path of granulite–amphibolite metamorphism is one of slow cooling from magmatic temperatures with heterogeneous deformation. The thinning of the pre-Andean (Precambrian–Triassic) crust was apparently compensated by the magmatic underplating and this special tectonomagmatic setting caused the prolonged residence of the accreted rocks at midcrustal levels.  相似文献   

新疆布尔克斯岱金矿床含金矿物标型特征及其地质意义   总被引：1，自引：2，他引：1  

郭定良  吴堑虹 《大地构造与成矿学》1996,20(2):165-171

对布尔克斯岱金矿床的主要含金矿物采用多种测试手段进行研究：如重砂、化学分析、Ｘ射线衍射分析、电子探针、ＥＰＲ谱、数学地质和包裹体分析等。对矿物特征及其与金矿化的关系作了较详细的研究。对确定矿床成因、找矿标志和成矿预测有一定意义。为矿床外围和深部找矿提供了依据。  相似文献   

矿物材料合成的直流弧光法   总被引：1，自引：0，他引：1  

陈素纯  傅慧芳 《大地构造与成矿学》1996,20(2):186-187

阐述了Ａｒ＋Ｈ２＋ＣＨ４气体体系中直流弧光放电过程，及其在金刚石膜等矿物材料合成中的应用。  相似文献   

恐龙蛋化石物质组分研究     

陈克樵  王毅民 《岩矿测试》1996,15(3):192-197

研究了ＸＬ０１恐龙蛋化石蛋腔内壁和腔内絮状物质的无机组分。采用常规的双目实体显微镜、偏光显微镜及扫描电子显微镜、电子探针和Ｘ光衍射仪，对蛋腔内主要三种矿物物相的物理性质、化学组成及矿物晶体结构进行了研究。并对腔内的矿物形态、结构特点及有利于有机大分子ＤＮＡ保存的条件做了讨论  相似文献   

东胜煤系高岭土矿床地质特征及开发利用前景   总被引：3，自引：0，他引：3  

黄焱球  程守田 《煤田地质与勘探》1997,25(6):10-13

东胜煤系砂岩型高岭土矿床是特大型沉积矿床，矿床地质条件简单，开采条件优越，矿石分３种类型，以砂岩型为主体，原矿组成简单，质量优良，尾矿以石英为主，是一种质量优良的玻璃原普，可综合利用，该高岭土的开发可与煤炭同步进行，具有投资少，见效快的特征，开发前景广阔。  相似文献   

矿物纤维粉尘的表面特性及对生物活性的影响   总被引：8，自引：0，他引：8  

董发勤  万朴 《地质科技情报》1997,16(3):77-81

通过对矿物纤维粉尘对人体的危害性及对环境影响的研究，提出了一些矿物产生毒理作用过程的假说和因素判定；研究了矿物与生物体之间的相互作用时应重视矿物表面－细胞物理化学作用，并依据初步试验提出表面特征是矿物纤维表征生物活性的关键因子（如表面活性域、催化作用等），而纤维性只是矿物表面特性的表征因素之一。  相似文献   

新矿物长城矿—铱的硫铋化物          下载免费PDF全文

於祖相 《地质学报》1997,71(4):336-339

长城矿产在铬铁矿体及临近矿体的铂砂矿中。呈块状聚集体或细脉状,分布在硫铱矿的边缘并交代它。不透明,金属光泽,钢灰色,条痕黑色。莫氏硬度H_M=3.7,显微硬度VHN_(20)=165kg/mm~2。均质性,无解理。计算密度D_(calc.)=11.96g/cm~3。7个电子探针分析的平均化学成分(％):S 7.2,Cu 0.3,Te 0.4,Ir 41.2,Pt 2.8,Bi 47.2,总量99.1。简化的化学式为IrBiS。5条最强X射线粉晶衍射线(hkl,d,I)为:210,2.75(70);211,2.51(60);311,1.860(100);440,1.090(50);600,1.027(50)。X射线粉晶衍射图谱与马营矿相似。进行对比后,长城矿可以指标化为等轴晶系、空间群P2_13。由X射线粉晶衍射线求得α=0.6164(4)nm,V=0.2342nm~3,Z=4。  相似文献   

Thermodynamic Modelling of Ore-Forming Mechanism of the Changkeng Gold-Silver Deposits in Guangdong Province     

Zhang Sheng  Li Tongjin  Wang LiankuiGuangzhou Institute of Geochemistry  Chinese Academy of SciencesWushan  Guangzhou 《《地质学报》英文版》1997,71(4):433-445

The Changkeng gold-silver deposits consist of a sediment-hosted, disseminated gold deposit and a replacement-type silver deposit. The mineralizations of gold and silver are zoned and closely related to the silicification of carbonate and clastic rocks, so that siliceous ores dominate in the deposit. The mineralizing temperature ranges mainly from 300 to 170℃, and K+, Na+, Ca2+, Mg2+, and Cl- are the major ions in the ore-forming fluid. Calculations of distribution of metal complexes show that gold is mainly transported by hydrosulphide complexes, but chloride complexes of silver, iron, lead, and zinc, which are transformed into hydroxyl and hydrosulphide complexes under neutral to weak-alkaline circumstances in the late stage, predominate in the ore-forming solutions. Water-rock interaction is confirmed to be the effective mechanism for the formation of silver ores by computer modelling of reaction of hydrothermal solution with carbonate rocks. The solubility analyses demonstrate that the precipitation  相似文献