云南大姚秀水河金铜矿区勐岗河矿段矿床成因   总被引：1，自引：0，他引：1  

纪辉  张正清 《云南地质》2009,28(3):295-298

铜矿体赋存于石英二长斑岩中,普登群（Pt1P）变粒岩为其围岩,矿化及岩性均可分带,其成因应属斑岩型铜矿叠加后期变质热液改造型多金属矿床,具有找到中大型金铜多金属矿床的潜力。  相似文献   

腾冲明光老波厂铅锌矿围岩蚀变及找矿标志     

胡波 《云南地质》2009,28(4):384-387

矿体产于白垩纪马头窝单元（K1^7M^λπ）石英斑岩与石炭系上统空树河组三段二层（C2k^3-3）地层的石英砂岩、长石石英砂岩接触带上,或上述两类岩石的破碎带中,矿体与围岩界线常呈波状起伏,呈突变或渐变接触。矿区围岩蚀变明显,有进一步找矿的前景。  相似文献   

Excel2007函数在矿产测试质量管理中的应用     

廖丽荣 《云南地质》2009,28(4):455-461

利用Excel2007中的函数和图表功能编制一系列公式,适合DZ／T0130—2006规范要求,自动计算地质样品检测结果及其合格率、报出率、△LgC值、相对偏差RSD％和RE％值,自动实现“四舍六入”修约。  相似文献   

Lower thermospheric nitric oxide concentrations derived from WINDII observations of the green nightglow continuum at 553.1 nm     

C. H. A. von Savigny  I. C. McDade  G. G. Shepherd  Y. Rochon 《Annales Geophysicae》1999,17(11):1439-1446

Vertical profiles of nitric oxide in the altitude range 90 to 105 km are derived from 553 nm nightglow continuum measurements made with the Wind Imaging Interferometer (WINDII) on the Upper Atmosphere Research Satellite (UARS). The profiles are derived under the assumption that the continuum emission is due entirely to the NO+O air afterglow reaction. Vertical profiles of the atomic oxygen density, which are required to determine the nitric oxide concentrations, are derived from coordinated WINDII measurements of the atomic oxygen OI 557.7 nm nightglow emission. Data coverage for local solar times ranging from 20 h to 04 h, and latitudes ranging from 42°S to 42°N, is achieved by zonally averaging and binning data obtained on 18 nights during a two-month period extending from mid-November 1992 until mid-January 1993. The derived nitric oxide concentrations are significantly smaller than those obtained from rocket measurements of the airglow continuum but they do compare well with model expectations and nitric oxide densities measured using the resonance fluorescence technique on the Solar Mesosphere Explorer satellite. The near-global coverage of the WINDII observations and the similarities to the nitric oxide global morphology established from other satellite measurements strongly suggests that the NO+O reaction is the major source of the continuum near 553 nm and that there is no compelling reason to invoke additional sources of continuum emission in this immediate spectral region.  相似文献   

Cooling rate of thermal electrons by electron impact excitation of fine structure levels of atomic oxygen     

A. V. Pavlov  K. A. Berrington 《Annales Geophysicae》1999,17(7):919-924

The atomic oxygen fine structure cooling rate of thermal electrons based on new effective collision strengths for electron impact excitation of the ground-state ³P fine-structure levels in atomic oxygen have been fitted to an analytical expression which is available to the researcher for quick reference and accurate computer modeling with a minimum of calculations. We found that at the F region altitudes of the ionosphere the new cooling rate is much less than the currently used fine structure cooling rates (up to a factor of 2–4), and this cooling rate is not the dominant electron cooling process in the F region of the ionosphere at middle latitudes.  相似文献   

Use of coupled ozone fields in a 3-D circulation model of the middle atmosphere     

T. Reddmann  R. Ruhnke  W. Kouker 《Annales Geophysicae》1999,17(3):415-429

With a detailed chemistry scheme for the middle atmosphere up to 70 km which has been added to the 3-D Karlsruhe simulation model of the middle atmosphere (KASIMA), the effects of coupling chemistry and dynamics through ozone are studied for the middle atmosphere. An uncoupled version using an ozone climatology for determining heating rates and a coupled version using on-line ozone are compared in a 10-month integration with meteorological analyses for the winter 1992/93 as the lower boundary condition. Both versions simulate the meteorological situation satisfactorily, but exhibit a too cold lower stratosphere. The on-line ozone differs from the climatological data between 20 and 40 km by exhibiting too high ozone values, whereas in the lower mesosphere the ozone values are too low. The coupled model version is stable and differs only above 40 km significantly from the uncoupled version. Direct heating effects are identified to cause most of the differences. The well-known negative correlation between temperature and ozone is reproduced in the model. As a result, the coupled version slightly approaches the climatological ozone field. Further feedback effects are studied by using the on-line ozone field as a basis for an artificial climatology. For non-disturbed ozone conditions realistic monthly and zonally averaged ozone data are sufficient to determine the heating rates for modelling the middle atmosphere.  相似文献   

1995—1996年云南地区三次强震前地震活动的短期异常     

杨继登  王世芹 《华南地震》1999,19(2):32-38

在地震学参量年度异常的背景＾（３）,阐述了１９９５￣１９９６年云南地区发生的孟连、武定、丽江三次强震前的地震活动短期异常,包括地震平静、小震群、窗口地震、调制地震、地震波参数以及４级左右地震向震中迁移等。结果表明,这些异常特征表现突出,其演化进程显示了强震孕育的阶段性。  相似文献   

Tides and short-term variabilities in the Kuroshio west of Yonakuni-jima   总被引：1，自引：0，他引：1  

Yuan Yaochu  Arata Kaneko  Wang Huiqun  Zhu Xiaohu  Su Jilan  Noriaki Goh  Chen Hong  Fang Tongde 《海洋学报(英文版)》1999,18(3):311-324

INTRODUCFIONTheKuroshioeastofTaiwanIslandflowsnorthwardandenterstheEastChinaalgathroughapaSSagebetweenTaiwanIslandandlriomote-shima.TOstudyfurthertheKuroshiothereandestimateitstransPOrt,itisnecessarytoobservetheKuroshioCurrentdirectly.Therehavebeen*ThisstudywassupportedbytheNationalNaturalaudienceFoundationofChinaundercontractNo.49476278.severaldirectobservationsoftheKuroshionearTaiwanIsland.Forexample,thedirectcurrentmeasurementat(24'24'N1123'35'E)byinabaetal.(1981)showedtheapp…  相似文献   

黑洞吸积盘内区温度的分布特征和演化特征     

汪定雄 《中国天文和天体物理学报》1999,(4)

对黑洞吸积盘内区温度的径向分布特征和演化特征作了详细的讨论．结果表明：（１）盘内区的温度并非随径向坐标ｒ单调减少,在接近盘的内边缘处有一个盘温的峰值环．在盘温的峰值环和盘的内边缘之间形成一个温度梯度很大的冷却区;（２）在盘吸积的过程中,盘内区温度的峰值和冷却区的平均温度梯度均随中心黑洞的无量纲角动量ａ的增加而单调增加,而金温峰值环半径和冷却区的径向宽度均随ａ的增加而单调减小;（３）盘的热辐射光度随ａ的增加而单调增加．  相似文献   

Seyfert 2 星系光谱偏振的汤姆逊散射机制     

朱青峰  林宣滨  程福臻 《中国天文和天体物理学报》1999,(4)

利用简单的ｔｏｒｎｓ束流模型定量计算Ｓｅｙｆｅｒｔ２型星系的偏振度和散射流量的角分布,在“一次电子散射”的假定下,得到偏振度约为１０％～８０％．而偏振流量的角分布与ｔｏｒｎｓ半张角θｃ和观测角φｏ都有关．特别是当φｏ　５５°时,观测方向的流量和总的散射流量的比值为一定值（０．１６）．用这种纯电子散射模型来解释ＮＧＣ１０６８的光谱偏振更为合适．对于其它一些具有低的偏振度的Ｓｅｙｆｅｒｔ２星系,尘埃的作用则不能忽略．  相似文献