共查询到20条相似文献，搜索用时 901 毫秒
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This paper provides a brief overview of two linear inverse problems concerned with the determination of the Earth’s interior:
inverse gravimetry and normal mode tomography. Moreover, a vector spline method is proposed for a combined solution of both
problems. This method uses localised basis functions, which are based on reproducing kernels, and is related to approaches
which have been successfully applied to the inverse gravimetric problem and the seismic traveltime tomography separately. 相似文献
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在航空重力测量的后期资料处理中,GPS技术主要作用是精确确定飞机的位置、速度和加速度,以提供可靠的飞机飞行参数和必要的重力加速度改正等.笔者以航空重力领域的实际需求,开发了航空重力的GPS后处理软件-EGPS.该软件能够利用伪距差分、多普勒频移的方法解算航空重力测量的载体位置、速度和加速度等.通过处理航空重力测量中GPS资料的速度解算实例,并与国外已经先进的航空重力测量处理软件的速度解算结果对比、分析,EGPS已经基本达到了航空重力测量领域对GPS速度高精度解算的要求. 相似文献
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高岭土中全硫量快速测定方法 总被引：13，自引：1，他引：13
采用碳酸钠一氧化镁半熔融一氯化钡滴定法测定高岭土中的硫含量。试样用碱性熔荆半熔，熔块以水浸取，将转化为硫酸盐后的滤液，以玫瑰红酸钠为指示剂，在pH为5．5．7．0的条件下，用氯化钡标准溶液进行滴定。测定结果的RSD=2．47％（n=5），加标回收率为95．2％-100．3％。改进后的方法已用于高岭土中全硫量的测定，结果与国标重量法相符。 相似文献
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深海沉积物中化合水的测定 总被引：1，自引：2，他引：1
针对用双球管重量法测定化合水（Ｈ２Ｏ＋）时试样中的Ｃｌ－对测定严重干扰，考察了用浸洗样品除Ｃｌ－以及校正双球管中冷凝水（Ｈ２Ｏ±）中Ｃｌ－的两种消除Ｃｌ－干扰的方法。实验证明，两种方法均可行，但后者更具有实用性，测定结果准确、精密度较好。所拟方法对新研制的ＧＳＭＳ＿２和ＧＳＭＳ＿３两个深海沉积物标准物质的化合水进行测定，结果与初定值相符。 相似文献
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Gravity data were analysed in the Northern Tunisian Atlas (case study of Oued Zarga area) to better understand the organization of its underlying structures. The gravity data analysis included the construction of a gravity anomaly maps and two and a half dimensional gravity model. The qualitative analysis of gravimetric maps served for the foundation of a new structural map of the study region that constitutes a new contribution of the gravimetry in this present work. In addition, the complete Bouguer and residual gravity anomaly maps indicate a negative gravity anomaly over the Triassic evaporitic outcrops of Jebel Guerouaou and prominent NE?CSW-trending features associated with the boundary of the Triassic rocks and surrounded layers. A NW?CSE-trending gravity model that crosses the Triassic evaporitic outcrop at Jebel Guerouaou can be explained by a deep-rooted salt diapir. 相似文献
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Geotectonics - Satellite gravimetry is recognized now as powerful and reliable tool for regional tectono-geodynamic zonation. The studied region contains intricate geodynamical features (high... 相似文献
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评论了航空重力测量和航空磁测观测技术,认为重力和磁力勘探进入一个新时期的标志是:航空矢量磁测、全张量磁力梯度测量、航空重力测量、重力梯度测量和无人飞行器地球物理探测。 相似文献
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Effect and Prospect of Basic Geological Survey Based on Airborne Gravimetry in China 总被引：1，自引：0，他引：1
LI Wenyong ZHOU Jianxin XIONG Shengqing GUO Zhihong LU Wenfen XU Jianchun LIU Yanxu 《《地质学报》英文版》2012,86(1):38-47
The airborne gravimetry was an important leap and innovation in the world’s history of geophysical exploration. China's first test of the airborne gravity geological survey in the onshore-offshore transitional area of the western and southern part of the Bohai Sea was successful and effective in geology. Based on the airborne gravity data, and combining previous ground gravity, seismic and drilling data etc., we carried out the geological interpretation by forward and inverse methods. The result shows that the airborne Bouguer gravity anomaly was clear, the fracture interpretation was reliable, and the inversion depth of the main geological interfaces was relatively accurate. This airborne gravity geological survey not only filled the exploring gaps in the onshore-offshore transitional area, and realized the geological and tectonic junction between the sea and the land, but also discovered four local gravity anomalies, 11 fractures and three sags or subsags, and so on. The good geological effect of airborne gravimetry not restricted by terrain condition shows that it can be served as a new geophysical method in the exploration of complex terrain physiognomy area such as mountain, jungle, desert, marsh, onshore-offshore transitional area and so on, and has an extensive application prospect in China in the future. 相似文献
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用差热和热（失）重法、ｐＨ值检验、离子色谱等分析方法考察和证实了Ｃｌ－对平菲尔特管重量法测定化合水（Ｈ２Ｏ＋）的干扰，研究其影响规律，提出用系数校正方法可获得Ｈ２Ｏ＋的准确结果。方法用于含氯深海沉积物和大洋多金属结核标准物质中Ｈ２Ｏ＋的定值分析，取得满意结果 相似文献
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I. V. Lygin A. A. Bulychev D. A. Gilod T. B. Sokolova A. A. Fadeev 《Moscow University Geology Bulletin》2014,69(2):61-67
The scientific educational practice on gravimetry for the second-year students of the geophysical specialty in 2012–2013 was executed in Central Russia (Kaluga region, the Village of Aleksandrovka). It allowed us to provide an educational process with modern high-precision gravimeters and to fully preserve the curricula and to add elements of topography and geodesic practice. Over these 2 years reliable facts and data were received, which illustrated the possibilities of high-precision gravity measurements in studying the sedimentary cover features of a geological structure. 相似文献
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Recent hydrological behavior of the East African great lakes region inferred from GRACE,satellite altimetry and rainfall observations 总被引：1，自引：0，他引：1
Mélanie Becker William LLovel Anny Cazenave Andreas Güntner Jean-François Crétaux 《Comptes Rendus Geoscience》2010,342(3):223-233
We have jointly analysed space gravimetry data from the GRACE space mission, satellite altimetry data and precipitation over the East African Great Lakes region, in order to study the spatiotemporal variability of hydrological parameters (total water storage, lake water volume and rainfall). We find that terrestrial water storage (TWS) from GRACE and precipitation display a common mode of variability at interannual time scale, with a minimum in late 2005, followed by a rise in 2006–2007. We argue that this event is due to forcing by the strong 2006 Indian Ocean Dipole (IOD) on East African rainfall. We also show that GRACE TWS is linked to the El Niño-Southern Oscillation cycle. Combination of the altimetry-based lake water volume with TWS from GRACE over the lakes drainage basins allows estimating soil moisture and groundwater volume variations. Comparison with the WGHM hydrological model outputs is performed and discussed. 相似文献
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A map of the tectonic zoning of the sedimentary cover in the Deryugin Basin area was constructed based on the structural data.
For this purpose, a structural-tectonic map of the sedimentary cover was compiled using CDP seismic reflection and gravimetry
data. Depending on the size, spatial position, and orientation, the structural elements of different orders were grouped into
tectonic systems. The latters were subdivided into structural zones consisting of higher order structural elements in the
form of relative rises and troughs. The corresponding maps and schemes are also presented in this paper. 相似文献
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介绍了全球垂直基准 (GVD)在监测与全球变化有关的海平面变化、现今地壳运动中的作用 ,论及GVD与国际地球参考架 (ITRF)的关系 ,对如何建立全球垂直基准及其精度作了讨论。研究表明只要按文中的方法进行卫星激光测距 (SLR)、全球定位系统 (GPS)观测与重力测量 ,则可使全球垂直基准比现今世界各地高程之差约 2m要提高一个数量级。 相似文献