Biostratigraphy of Upper Quaternary sediments in the southern part of the Oceanology Institute Rise,Sea of Okhotsk     

S. P. Pletnev  M. V. Cherepanova  E. D. Ivanova  I. V. Utkin  Ya. V. Kuz’min  G. S. Burr 《Stratigraphy and Geological Correlation》2010,18(4):450-463

The diversified analysis (data on radiocarbon ages, diatoms, planktonic and benthic foraminifers) of sediments from the central part of the Sea of Okhotsk (core from a depth of 1186 m) made it possible to define five sedimentary units corresponding to five marine oxygen-isotope stages MIS 5-MIS 1 (the last 120 ka) and provide their thorough paleontological characteristic, using different microfossil groups. Microfossil assemblages demonstrate variations in their abundance, distribution of individual species, and representatives of different ecological groups through the section.  相似文献   

Carbonaceous matter in sulfide-quartz veins at the Kurultyken base-metal deposit,eastern Transbaikal region,Russia     

M. I. Kuz’min  Yu. P. Troshin  S. M. Boiko  E. A. Razvozzhaeva  L. D. Zorina  D. Kh. Martikhaeva 《Geology of Ore Deposits》2010,52(3):252-259

The carbonaceous matter filling cavities in sulfide-quartz veins at the Kurultyken hydrothermal base-metal deposit in the Khapcheranga ore district, Transbaikal region, was studied using chromatography/mass spectrometry, X-ray diffraction, thermal and isotopic analyses, and IR spectroscopy. It was established that carbonaceous matter was a maltha composed of polycyclic aromatic hydrocarbons (PAHs). Chrysene, pyrene, and benzpyrelene identified among PAHs are evidence for the hydrothermal origin of the initial carbonaceous matter of maltha. The main mass of carbonaceous matter was synthesized under reductive conditions and at a low temperature, i.e., at the final stage of base-metal ore formation. Nevertheless, the thermometric data indicate that part of the carbonic compounds could have formed at 480°C, i.e., at the high-temperature stage of the postmagmatic process. The contribution of host rocks as a source of carbonaceous matter was minimal.  相似文献   

Non-linear motions of Australian geodetic stations induced by non-tidal ocean loading and the passage of tropical cyclones     

A. Mémin  C. Watson  I. D. Haigh  L. MacPherson  P. Tregoning 《Journal of Geodesy》2014,88(10):927-940

We investigate daily and sub-daily non-tidal oceanic and atmospheric loading (NTOAL) in the Australian region and put an upper bound on potential site motion examining the effects of tropical cyclone Yasi that crossed the Australian coast in January/February 2011. The dynamic nature of the ocean is important, particularly for northern Australia where the long-term scatter due to daily and sub-daily oceanic changes increases by 20–55 % compared to that estimated using the inverted barometer (IB) assumption. Correcting the daily Global Positioning System (GPS) time series for NTOAL employing either a dynamic ocean model or the IB assumption leads to a reduction of up to 52 % in the weighted scatter of daily coordinate estimates. Differences between the approaches are obscured by seasonal variations in the GPS precision along the northern coast. Two compensating signals during the cyclone require modelling at high spatial and temporal resolution: uplift induced by the atmospheric depression, and subsidence induced by storm surge. The latter dominates ( \(>\) 135 %) the combined net effect that reaches a maximum of 14 mm, and 10 mm near the closest GPS site TOW2. Here, 96 % of the displacement is reached within 15 h due to the rapid transit of cyclones and the quasi-linear nature of the coastline. Consequently, estimating sub-daily NTOAL is necessary to properly account for such a signal that can be 3.5 times larger than its daily-averaged value. We were unable to detect the deformation signal in 2-hourly GPS processing and show that seasonal noise in the Austral summer dominates and precludes GPS detection of the cyclone-related subsidence.  相似文献   

Sulfoarsenide complexes of gold in hydrothermal solutions in the formation of gold ore deposits (thermodynamic modeling)     

N. V. Vilor  L. A. Kaz’min  N. A. Goryachev 《Doklady Earth Sciences》2014,458(1):1086-1091

The composition and conditions of the formation of gold sulfoarsenide complexes were studied by means of the solution of inverse problems of physicochemical modeling on the basis of the SELEKTOR software, with the computer analysis of the experimental data on Au dissolution in the presence of orpiment at 200–300°C and 1 kbar pressure. It was shown that sulfoarsenide complexes of gold formed in sulfurous-arsenious metalliferous hydrothermal solutions quantitatively prevailed in acidic and near-neutral solutions in the presence of As. The stability of the H₂AuAsS ₃ ⁰ sulfoarsenide complex and of its AuAsS ₂ ⁰ deprotonated analogue depends on the concentration of arsenic in the system, just as the ratio of sulfoarsenide and hydrosulfide complexes of gold. The productive metalliferous generations of sulfides in pyrite-arsenopyrite parageneses are deposited involving gold sulfoarsenides.  相似文献   

用数学形态学变换实现空间分析中的数据处理   总被引：1，自引：0，他引：1  

何宏星  马智民  罗广祥 《地球科学与环境学报》1999,(Z1)

论述了数学形态学的基本算法， 并将这一方法引入空间分析的数据处理中。研究表明，该方法具有一定的可行性， 对于空间分析中一些问题的深入研究具有参考价值  相似文献   

TLS室内规范检定场自检校     

刘成  周江铃  刘江 《北京测绘》2018,32(6):742-746

根据中华人民共和国2013年5月发布的《JJF 1406-2013地面激光扫描仪校准规范》规定的静态地面激光扫描仪的校准方法。借助山东科技大学学术先进的硬件资源,结合此规范对影响地面三维激光扫描仪性能参数的校准进行了深入研究,并通过实验进行了方法改进和数据验证,清晰明了的解释了2013年颁布的新规,为三维激光扫描仪的使用提供是参考依据。  相似文献   

二连盆地阿拉达布斯凹陷南洼槽阿尔善组储层特征研究     

周玉娟  高海仁  吕敏  弓虎军 《地下水》2015,(1):191-193

根据岩心、测井、铸体薄片、扫描电镜等多种分析测试资料,对阿尔善组储层岩石学、储集物性及特征进行系统综合研究[1-4]。结果表明:阿尔善组储层岩性主要为岩屑砂岩,其次为岩屑长石砂岩、长石岩屑砂岩,具有成份成熟度、结构成熟度较低的特点,主要是碎屑岩母岩近物源、搬运距离短以及频繁的火山活动综合作用的结果[5];填隙物主要为泥质粘土、胶结物。储层特征主要受沉积作用、成岩作用、构造作用的综合影响[6]。  相似文献   

任一力学量■的矩阵元Fmn的微扰近似计算     

李祚泳  邓新民 《成都信息工程学院学报》1989,(3)

本文以能量和波函数的各级微扰近似的基态展开式为基础,推导出任一力学量的矩阵元F_(mn)的各级微扰近似表示式。并且指出只要构成能量展式的级数收敛很快,满足能够应用微扰的条件,那么对于任一力学量F的微扰计算,只要计算矩阵元F_(mn)的前二级近似就已足够精确。  相似文献   

Basaltic and Solution Reference Materials for Iron,Copper and Zinc Isotope Measurements     

Jin Li  Suo‐han Tang  Xiang‐kun Zhu  Zhi‐hong Li  Shi‐Zhen Li  Bin Yan  Yue Wang  Jian Sun  Yao Shi  Aiguo Dong  Nick S. Belshaw  Xingchao Zhang  Sheng‐ao Liu  Ji‐hua Liu  Deli Wang  Shao‐yong Jiang  KeJun Hou  Anthony S. Cohen 《Geostandards and Geoanalytical Research》2019,43(1):163-175

Iron, Cu and Zn stable isotope systems are applied in constraining a variety of geochemical and environmental processes. Secondary reference materials have been developed by the Institute of Geology, Chinese Academy of Geological Sciences (CAGS), in collaboration with other participating laboratories, comprising three solutions (CAGS‐Fe, CAGS‐Cu and CAGS‐Zn) and one basalt (CAGS‐Basalt). These materials exhibit sufficient homogeneity and stability for application in Fe, Cu and Zn isotopic ratio determinations. Reference values were determined by inter‐laboratory analytical comparisons involving up to eight participating laboratories employing MC‐ICP‐MS techniques, based on the unweighted means of submitted results. Isotopic compositions are reported in per mil notation, based on reference materials IRMM‐014 for Fe, NIST SRM 976 for Cu and IRMM‐3702 for Zn. Respective reference values of CAGS‐Fe, CAGS‐Cu and CAGS‐Zn solutions are as follows: δ⁵⁶Fe = 0.83 ± 0.07 and δ⁵⁷Fe = 1.20 ± 0.13, δ⁶⁵Cu = 0.57 ± 0.06, and δ⁶⁶Zn = ?0.79 ± 0.12 and δ⁶⁸Zn = ?1.65 ± 0.24, respectively. Those of CAGS‐Basalt are δ⁵⁶Fe = 0.15 ± 0.07, δ⁵⁷Fe = 0.22 ± 0.10, δ⁶⁵Cu = 0.12 ± 0.08, δ⁶⁶Zn = 0.17 ± 0.13, and δ⁶⁸Zn = 0.34 ± 0.26 (2s).  相似文献   

Ecological-Geologic Risks Related to the Development of Resource Regions     

M. I. Kuz’min  A. N. Kuznetsova 《Geography and Natural Resources》2018,39(2):95-102

The ecological functions and features of the geologic environment are investigated in terms of environmental geology. The current status of the geologic medium is characterized as a crisis, and the issues of its protection and rehabilitation are not appropriately addressed in environmental protection activity of the state and businesses. The most critical ecological-geologic risks include destruction and deformation of geologic strata, huge amounts of industrial waste, oil spills, landscape and soil degradation, air and surface water pollution, seismic and mudflow phenomena, etc. Mining operations have the greatest negative influence on the environmental parameters of the geologic medium. Inadequate attention to issues related to the present state and protection of the geologic medium leads to accidents and crises in industrial installations. Ecological-geologic hazard hotspots have emerged in areas of intense extraction and processing of mineral raw materials. On the other hand, the environmental component of active mineral resource use is neglected when formulating the prospects for a further development of resource regions. The country’s major mining companies, active participants of the world market of mineral resources, are the most proficient in sustainable mineral resource use. In recent years, Russia saw a large-scale improvement of environmental legislation. Many legal innovations focusing on the preservation of the geologic medium are scattered among different laws. The legal and financial preconditions for the ecologization of mineral resource use are examined. The state plays a key role to stimulate the sustainable mining, processing and transportation of useful minerals. It has to change significantly the system to support the geologic medium protection.  相似文献