排序方式: 共有67条查询结果,搜索用时 125 毫秒
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杨柳坪岩浆Ni Cu PGE硫化物矿床位于四川丹巴县城南东 178°方位 ,直距 2 0km。东经 10 1°5 4′10″~ 10 1°5 5′0 0″ ,北纬 30°4 1′30″~ 30°4 2′2 0″。该矿床是中国重要的PGE矿床之一 ,PGE金属储量超过 30t。矿区分为杨柳坪、协作坪、正子岩窝 3个矿段 ,总面积约 18km2 ,属丹巴县格宗乡所辖。该矿床的一般地质特征及PGE矿物组合已有报导。与Uitkomst ,Noril sk Talnakh ,Voisey sBayNi Cu PGE硫化物矿床相似 ,杨柳坪Ni Cu PGE硫化物矿床也产出在相对较小的侵入岩体中。为进一步探讨矿床成因及其与矿区附近大石包组… 相似文献
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西藏地区联合应用X荧光法和快金分析法快速追踪和评价金异常源 总被引:1,自引:1,他引:1
论述了在西藏地区某金矿区金异常的追踪和评价工作中,联合应用X荧光法和快金分析法的效果,以X荧光法现场测定与金矿化密切相关亲铜元素(或亲铜元素组合),发现,追踪含金矿(化)脉(带),以快金分析法及时对矿(化)脉定性,实践表明,这是一种简捷,快速,经济和有效的工作方法。 相似文献
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To characterize the hydrothermal processes of East Pacific rise at 9o-10oN, sulfide mineral compositions, textural, and geochemical features of chimney ores were studied using ore microscope, scanning electron microscope, X-ray diffraction analysis, and electron microprobe techniques. Results show that there are three mineral assemblages for the hydrothermal chimney ores, namely: (i) anhydrite marcasite pyrite, (ii) pyrite sphalerite chalcopyrite, and (iii) chalcopyrite bornite digenite covellite. Mineral assemblages, zonational features, and geochemical characteristics of the ore minerals indicate that ore fluid temperature changed from low to high then to low with a maximum temperature up to 400 ℃. The chimney is a typical black smoker. The initial structure of the chimney was formed by the precipitation of anhydrites, and later the sulfides began to precipitate in the inner wall. 相似文献
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天然气水合物是在高压、低温条件下由水分子和气体分子形成的笼形化合物,是21世纪一种具有巨大潜在开发价值的海洋新型能源矿产.其勘探、开发和利用的科学与技术是当前面临的重大课题.天然气水合物的地球物理识别标志包括似海底反射层、空白反射带、极性反转、垂直地震剖面(VSP)和全波形反演速率、AVO和VAMP'S结构、测井等;地球化学识别标志包括甲烷异常、表层沉积物中的H2S气体异常和大气中CO2含量异常等气体异常检测,沉积物中含水量异常、孔隙水离子浓度异常、同位素地球化学异常等流体地球化学标志,以及标志性矿物(标型矿物)及沉积物热释光分析等. 相似文献
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Laser Raman spectrochemical analysis on single inclusion reveals that multi-phase fluid inclusions exist in the Xuebaoding
Beryl-Scheelite Vein Deposit. Besides the solid daughter mineral, there are vapor CO2, liquid CO2, water-deficient CO2 and salt water solution from its center to the border. A close study on the fluid inclusion components and carbon, oxygen,
helium and argon isotope tracing and dating suggests that the volatile-rich ore fluid might derive from postmagmatic fluid
and rare element enrichment is the result of the mixture of the plutonic alkali granite with crustal material. 相似文献