排序方式: 共有71条查询结果,搜索用时 15 毫秒
1.
2.
3.
Characteristics of melt inclusions in skarn minerals from Fe,Cu(Au) and Au(Cu) ore deposits in the region from Daye to Jiujiang 总被引:5,自引:0,他引:5
The skarns and skarn deposits are widely distributed at home and abroad. The skarn deposits include many kinds of ores and higher ore grade. Some of them are broad in scale. Scientists of ore deposits from different countries have paid and are paying grea… 相似文献
4.
李兆麟 《矿物岩石地球化学通报》1992,(3)
近年来,我国实验地球化学在当前地质事业不景气的情况下,每年国家自然科学基金都注意到支持和扶植这一领域的研究项目,并取得不少成绩。此外,已创立的实验基地及各实验地球化学实验室为科研生产服务,发挥了积极作用。在新的形势下,实验地球化学往何处去?如何走出一条适合于当今科学及经济发展的道路?现提出一点肤浅见解供大家参考。 1.实验地球化学发展应加强矿物中包裹体研究与成岩成矿实验相结合。我们认为实验地球化学是利用专门实验手段测定天然地球化学作用的各种物理化学参数及模拟空间化学、地球化学的学科。涂光炽在《实验地球化学》(1988)一书序言中指出:实验地球化学涉及面较宽,凡在室内对岩石圈、大气圈、外来天体和天体本身的各式各样化学组成、化学作用和化学演化进行基础实验、应用实验和模拟实验热力学和动力学以及气液与熔融包裹体研究,均可包括在内。矿物中包裹体研究可以获得比较客观的天然地球化学作用的各种物理化学参数, 相似文献
6.
粒间溶液形成条件的实验研究 总被引:1,自引:0,他引:1
粒间溶液形成条件的实验研究李兆麟,雷丽红,郭洪中,蒋浩深,赵梅芳(中山大学地质系,广州510275)(南京大学地球科学系,南京2100008)关键词粒间溶液,实验地球化学关于粒间溶液成矿的问题,作者在1986年进行过论述,1989~1992年进行了深... 相似文献
7.
The formation of the Mufushan granopegmatite was closely related to the Late Yenshanian multiphase and multistage magmatic activities,More than one generation of beryl and aquamarine occur in different types of pegmatite in the granites.The presence of melt and melt-fluid inclusions strongly indicates a melt-solution character of the pegmatitic magma.Forming temperatures of the different generations of beryl in a Na^ -K^ ,Ca^2 -CO3^2--Cl^--SO4^2- solution ranges from 990℃to 200℃.Aquamarine was formed at 720-180℃.The contents of alkali metals(Na^ K^ )in th ore-formming solution of aquamarine are lower than those in the beryl,but the contents of alkali earths(Ca) and salinity are higher,The granite was generated by remelting of the basement formation(meta-sedimentary rocks of the Lengjiaxi Group)which also served as the source of ore-forming material.Beryllium in the pegmatite was transported mainly in the form of Na[Be(CO3)2],with part of it being complexed with Cl^- and SO4^2-.During the generation and evolution of the pegmatite,equilibrium might have been reached in the solid-melt-fluid or solid-fluid system.The intergranular solutions may have reacted with the early crystallized minerals,resulting in potash-feldsparization,albitization and muscovitization during which the ore-forming elements were mobilized and transported in favour of ore deposition. 相似文献
8.
9.
ACROFI,abbreviation of the Asian Current Research on Fluid Inclusions,is a parallel of ECROFI and PACROFI.The first conference of ACROFI(ACROFI-I)was held at Nanjing University,China on 26~28 May 2006.ACROFI was designed as a biennial conference and aimed at providing an international forum for the exchange of latest researches and new ideas of geoscientists from academy,government and industry from Asian countries and other nations focusing on studies of both fluid and silicate inclusions. 相似文献
10.
中国云南哀牢山含海蓝宝石伟晶岩的起源和成岩模拟实验研究 总被引:1,自引:0,他引:1
The Ailaoshan aquamarine-bearing pegmatites are associated with Proterozoic metamorphic rocks in the southern portion of the Ailaoshan fault-folded complex.The gem-bearing pegmatite mineralization zones of the region occur in areas generally consistent with the regional tectonic trend.The pegmatites are found in metamorphic rocks,migmatites and in the inner/outer contact zones of gneissoid granites. The Rb-Sr isochron drawn for the pegmatites is 26~31 Ma,(i.e.in Himalayan).The homogenization temperatures of melt and liquid inclusions in minerals vary from 185 to 920℃,which are comparable to the inclusions observed in banded migmatites and ptygmatic quartz veins in the surrounding metamorphic rocks. The mineralization fluids of the pegmatite were rich in HCO_3 and CO_2,and their compositional assemblages are comparable to metamorphic fluids.Results of H,O,C,Si etc.isotopic analyses and REE,and Be analyses indicates that the sources of mineralization components that formed the pegmatites are closely associated with metamorphic fluids and the enclosing metamorphic rocks. A pegmatite structure simulation experiment was conducted at high temperature and pressure(840℃and 1,500×105Pa.),with various metamorphic rock samples in a water-rich and volatile-rich environment.When the liquidus was reached,the temperature was gradually decreased at the rate of 5~10℃/day over a time period of three months.SEM energy-dispersive spectrum analyses were performed on the experimental products.A series of pegmatoid textures were observed including zonal texture,megacryst texture,drusy cavities,crystal druses,and vesicular texture along with more than ten types of minerals including plagioclase,microcline,quartz and biotite.Different metamorphic rock melts generated different mineral assemblages.Experiment results revealed that the partial melting of metamorphic rocks could form melts similar to pegmatite magmas. Based upon the geological characteristics,geochemistry,and pegmatite texture simulation experimental results,it is concluded that the mineralization components of Ailaoshan aquamarine-bearing pegmatites came from metamorphic rocks.The petrogenetic model for the origin of pegmatites is related to ultrametamorphism and metamorphic anatexis. 相似文献