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不同成矿阶段流体包裹体气相成分的四极质谱测定 总被引：14，自引：10，他引：14
四极质谱法测定的爆裂温度曲线，可区分出不同成矿阶段群体包裹体温度区间，并分别测定其气相组成。代表不同成矿阶段的包裹体气相组成有明显差异。本研究表明用四极质谱法测定同一样品中不同成矿阶段的包裹体气相组分是可行的，拓宽了成矿流体研究的思路，为研究多期次成矿流体的来源、演化和解译矿床成因提供了新的方法、手段。 相似文献
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小加山钨矿区位于东准噶尔成矿区中部南缘,处于博格达-哈尔里克构造带上。构造位置上矿区处于哈尔里克复式背斜中,构造线方向以EW向为主。矿区出露地层主要为中泥盆统大南湖组第一亚组第一段(D_2d_1~1)、和第二段(D_2d_1~2)。主要岩浆岩有石英闪长岩、黑云母二长花岗岩、钾长花岗岩及少量中酸性花岗闪长岩脉。矿体赋存于邻近海西晚期花岗岩侵入体附近的中泥盆统大南湖组第一亚组第二段(D_2d_1~2)的变质晶屑凝灰岩中。矿石类型为石英脉型黑钨矿石,有用金属主要为黑钨矿,黑钨矿石英脉分为灰色含钨石英脉和白色含钨石英脉2种。四极质谱分析法测得矿床流体包裹体气相成分以H_2O、CO_2为主,次为N_2、CH_4,此外还含有少量的Ar、C_2H_6,液相成分以Cl~-、Na~+为主,次为Ca~(2+),表明成矿流体主要为H_2O-CO_2-NaCl体系。矿床成因类型属于高温热液石英脉型黑钨矿床,矿体主要位于围岩裂隙构造。钨主要由侵入围岩地层中的地幔热液迁移富集而来,W元素迁移过程中,含钨络合物成矿流体分解进而沉淀成矿。 相似文献
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本文应用三维柱坐标时域有限差分方法模拟了多极子随钻声波测井的波场，提出了在横向各向同性（TI）慢速地层倾斜井中，使用四极源激发、多模式采集进行各向异性参数反演的方法.模拟结果表明：在强各向异性地层大角度倾斜井中使用四极源能够激发出多极模式波，并且井孔内的声场会随着声源方向角β（声源方向和快横波偏振方向的夹角）的改变而发生变化.使用四极子采集方式记录时，可以发现波形会分裂成快慢两种波；并且在声源方向与地层快横波偏振方向成45°时，分裂的两种波形的速度更趋近于地层快慢横波波速，用此可反演地层各向异性值大小.使用单极子采集方式记录时，其波形能量与声源方向角β大致成cos22β的关系，在声源方向角为45°时，其波形幅度最小，用此可判断与快横波偏振方向成45°角的方向.使用AC方向（与声源同方向）偶极子采集方式记录时，当声源方向与快横波偏振方向一致时，采集到的波形幅度最小；而与快横波偏振方向垂直时，波形幅度最大，所以通过偶极子采集方式记录的波形可以判断快横波偏振方向.因此，在强各向异性倾斜井中进行随钻四极子测量时，可以使用多模式采集方式来进行地层各向异性的反演. 相似文献
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Range of values of the Sun's mass quadrupole moment of coefficient J2 arising both from experimental and theoretical determinations enlarge across literature on two orders of magnitude, from
around 10-7 until to 10-5. The accurate knowledge of the Moon's physical librations, for which the Lunar Laser Ranging data reach an outstanding precision
level, prove to be appropriate to reduce the interval of J2 values by giving an upper bound of J2. A solar quadrupole moment as high as 1.1 10-5 given either from the upper bounds of the error bars of the observations, or from the Roche's theory, is not compatible with
the knowledge of the lunar librations accurately modeled and observed with the LLR experiment. The suitable values of J2 have to be smaller than 3.0 10-6.
As a consequence, this upper bound of 3.0 10-6 is accepted to study the impact of the Sun's quadrupole moment of mass on the dynamics of the Earth-Moon system. Such as
effect (with J2 = 5.5±1.3 × 10-6) has been already tested in 1983 by Campbell & Moffat using analytical approximate equations, and thus for the orbits of
Mercury, Venus, the Earth and Icarus. The approximate equations are no longer sufficient compared with present observational
data and exact equations are required. As if to compute the effect on the lunar librations, we have used our BJV relativistic
model of solar system integration including the spin-orbit coupled motion of the Moon. The model is solved by numerical integration.
The BJV model stems from general relativity by using the DSX formalism for purposes of celestial mechanics when it is about
to deal with a system of n extended, weakly self-gravitating, rotating and deformable bodies in mutual interactions.
The resulting effects on the orbital elements of the Earth have been computed and plotted over 160 and 1600 years. The impact
of the quadrupole moment of the Sun on the Earth's orbital motion is mainly characterized by variations of
,
, and
. As a consequence, the Sun's quadrupole moment of mass could play a sensible role over long time periods of integration of
solar system models.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
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数值计算了四极子声源在含钻铤竖直向横向各向同性(VTI)地层井孔中产生的各种模式波的频散曲线、激发幅度以及对各地层、钻铤参数的灵敏度,合成了四极子阵列波形,研究了快、慢速地层井孔中地层各向异性的存在对四极子波场的影响.数值计算结果表明,地层各向异性对钻铤波的影响很小,对于地层波的影响较大,且影响因素非常复杂.仅在一些特殊的频率点处,地层模式波的控制因素相对较为简单,如螺旋波的截止频率处.在慢速地层井孔中,最低阶的地层四极子波对距离井壁约2个井孔半径内的地层有明显的响应,可以对该范围内的地层横波进行层析成像.在快速地层井孔条件下,可以考虑采用与横波到时相同的波包来评价地层横波信息.该波包包含了井孔折射横波、F1和F2模式与井孔折射横波速度相接近的部分;利用该波包获得的地层横波速度基本不受地层各向异性的影响.在慢速地层情况下,螺旋波受地层各向异性的影响较大,建议在实际数据处理时,考虑采用基于数据的处理方法进行频散校正. 相似文献
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