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山东招平断裂带大磨曲家金矿床流体包裹体初步研究 总被引：1，自引：0，他引：1
The Damoqujia gold deposit, discovered recently and located in the north of Zhaoping fault zone, is a large altered rock type deposit. In this paper, we report the preliminary research results of the fluid inclusions and discuss its metallogenic implications. The homogenization temperatures of fluid inclusions fall into four ranges： 310 ～350℃, 230 ～270℃, 160 ～ 200℃ and 110 ～ 150℃ ; corresponding to the four stages of hydrothermal ore～forming processes ： coarse grain pyrite～milk white quartz stage （ I ）, smoky gray Au～bearing quartz～fine grain pyrite stage （ 11 ） , Au～bearing polymetallic sulfide～quartz stage （ III ） , and quartz～carbonate stage （ IV ）. Ore～forming fluid is with low salinity and low density, ranging from 1.4 WtNacl% to 13.6 WtN～cl% and from 0.48g/cm～ to 1.03g/cm～ respectively. The inclusions are dominated by H20 and CO2 in gaseous compositions, and Na ＋ and K ～ in positive ions, SO～～ and CI ～ in negative ions of liquid compositions. Au～S complex is the major form for transportation of gold. The pressure varied from 260MPa to 340MPa during the formation of CO2～bearing inclusions at the early mineralization; the fluids are rich in SO～～ and Na ＂. The pressure is 26 ～49 ～ 105 Pa during the formation of the aqueous salt inclusions in late mineralization, the inclusions are rich in CI～ （ F～ ）, Na～. ～$18Oqu～,zis 10. 64 ～ 12.68%0, and the corresponding ～518 OH2o and ～＆D is -5.44 ～ 6.47%0 and -95.52 ～ 106.48%o respectively. Based on the studies about compositions and hydrogen and oxygen isotopes of inclusions, it is evidenced that ore-forming fluid is magmatic hydrothermal fluid in early period, but affected by meteoric water in late. 相似文献
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江苏省扬州市是全国信息化试点城市之一,也是全国首批数字化城市管理试点城市之一。扬州市现有普通中学186所,中等职业学校18所,小学279所,在职中小学教师3．8万人,在校中小学生56万人。目前全市生机比达11：1,师机比达3：1,多媒体教室有2000个,网络机房有780个,建成校园网的学校377所,“班班通”教室达2500个, 相似文献
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教育信息化是教育领域内的一场革命。我国基础教育信息化通过近十年的建设已取得了一定的成果，尤其是在硬件建设方面成效显著，但是在应用层面却遇到了一定的瓶颈，主要表现为：优质资源缺乏，教师培训工作滞后，实际使用效率不高，教师教学理念和技术理念、管理人员管理理念和技术理念存在脱节以及地区发展不平衡等问题。 相似文献
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周应华 《中国科教创新导刊》2008,(16):110-110
操作系统是计算机科学的重要分支学科,实行双语教学是计算机课程双语教学的重要环节。通过逆向思维分析指出操作系统双语教学不应采用英语沉浸模式,而应采用双重语言模式。描述了所开展的操作系统双语教学活动,分析认为这一教学实践是成功的,最后提出进一步提高双语教学效果的工作思路。 相似文献
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