SD法在金矿资源/储量估算中的应用—以山东省烟台市牟平区阎家疃金矿床(3)1号矿体为例

SD法是以动态分维几何学为理论,以最佳结构地质变量为基础的资源/储量估算方法。该次使用北京恩地科技发展责任公司开发的SD矿产资源信息系统储量通V4.0,对阎家疃金矿床(3)-1号矿体进行了资源/储量估算,对矿体的地质可靠程度、工程控制程度及储量的精确程度进行了审定,并在圈定矿体形态及估算结果 2个方面,与传统地质块段法进行了对比,认为SD法具有功能强大、结果稳健的优势。     

The Tashisayi nephrite deposit from South Altyn Tagh,Xinjiang,northwest China

The Tashisayi nephrite deposit is located in South Altyn Tagh.in Qiemo County,Xinjiang Province,northwest China.It is a recent discovery in the vast,well-known Kunlun-Altyn nephrite belt distributed along the south of the Tarim Basin,producing more than half of the nephrite from the whole belt in 2017.Field investigations revealed that it is a dolomitic marble-related(D-type)nephrite deposit,but little is known about its age of formation and relationships between the granites and marble.Here we report field investigations,petrography of the neph rite,as well as petrography,geochemistry,geochronology of the zoisite-quartz altered intrusive rock and adjacent granites.An A-type granite is identified with a SHRIMP U-Pb zircon age of 926± 7 Ma,suggesting it was emplaced in an extensional tectonic environment at that time.The altered intrusive rock has a cluster of U-Pb zircon age of 433± 10 Ma.with similar trace element features to the A-type granite,suggesting it was formed in an extensional regime at this later time.Nephrite formed because of the metasomatism of dolomite marble by hydrothermal fluids.It is inferred that Ca~(2+) was released from the dolomitic marble by metasomatism forming Ca-rich fluids,which caused alteration of both the intrusive rocks(6.00-8.22 wt.% CaO)and granite(1.76-3.68 wt.% CaO)near the nephrite ore bodies.It is also inferred that Fe2+ from the granite migrated towards the dolomite marble.The fluids gave rise to the formation of Ca-minerals.such as zoisite,in the nephrite and altered intrusive rock,and epidote in the granite.Based on the contact relationships.similarity in hydrothermal processes,and consumption of Ca~(2+),the Tashisayi nephrite is considered to have formed at the same time as the alteration of the intrusive rocks,i.e.～433 Ma.The geochronological similarity(～926 Ma.433 Ma)of South Altyn and North Qaidam may suggest that tectonically they belong to one single complex in the past,which was offset by the Altyn Tagh fault(ATF).The similar formation ages of the nephrites from Altyn Tagh(433 Ma)and the previously studied areas of West Kunlun(378-441 Ma)and East Kunlun(416 Ma)indicate that these nephrites formed during the closure of Proto-Tethys and in the accompanving post-collisional.extensional environment.     

Types of Organic Fades and Source Rock Assessment of the Coal-Measure Mudstone in the Turpan-Hami Basin

This paper discusses the enviromental characteristics of carbonaceous mudstone and mudstone (coal-measure mudstone in short) of the Early and Middle Jurassic in the Turpan-Hami basin, which were formed in swamps. Through the organic facies study of the coal-measure mudstone in this area, the authors clarify that the flowing-water swamp is the most advanced organic facies belt. Furthermore, according to the practical materials of coal-measure mudstone in the area and with the evaluation criteria of lacustrine mudstone in the past, the authors have established the integrated symbol systems from the abundance of organic matter and the type of organic matter, which can be used in the source rock evaluation of the coal-measure mudstone.     

网络探测在陕西气象部门的应用

高性能集群系统为数值气象预报的发展提供了强有力的支撑.本文以山西省气象局目前使用的曙光4000高性能集群机为例,简要介绍高性能计算集群系统的特点、运行情况,并对日常管理维护做简单的总结.     

基于RUSLE的广东南岭土壤侵蚀敏感性研究

基于修正的通用水土流失方程RUSLE和GIS技术,分析了影响土壤侵蚀敏感性的降雨侵蚀力因子、土壤可蚀性因子、坡度坡长因子以及植被覆盖与管理因子,并生成单要素敏感性评价图,在此基础上,评价研究区土壤侵蚀敏感性,探讨不同土壤侵蚀敏感性的分布规律及其主导因子的空间分异特征。结果表明：降雨侵蚀力因子的变化范围为8 181.52~14 621.56（MJ·mm）/（hm2·h·a）,土壤可蚀性因子为0.146~0.238（t·hm2·h）/（hm2·MJ·mm）,坡度坡长因子为0~612.615,植被覆盖与管理因子为0.101~1.183,土壤侵蚀的最大值和平均值分别为7 016.44和137.69 t/（km2·a）,土壤侵蚀敏感性以低度敏感和较低敏感为主,不同影响因子在敏感性分区的变化范围不同,其中地形因子和植被覆盖与管理因子对土壤侵蚀最为敏感。     

Light demands of juvenileLaminaria japonica

The light demands of seaweeds is an interesting and rather complex phenomenon because they depend not only on the species but also on their different development stages. Even different parts of the same plant sometimes have different light demands. Light control is an important procedure at large scaleLaminaria nursery stations in China. Technicians and scientists have different viewpoints on the best method to regulate light. A culture study onLaminaria japonica starting from zoospores to several centimeter sporophytes to find the optimal and critical irradiance ranges for juvenileLaminaria at different development stages added more knowledge on this aspect. Experiment results show gametophytes can not tolerate irradiance of more than 150 μE m⁻²s⁻¹ while sporophytes can tolerate more than 519 μE m⁻²s⁻¹. This big difference starts from the very early stage of 1-to 2-celled sporophytes. The biological basis and mechanism of this phenomenon need further research. Contribution No. 1515 from the Institute of Oceanology, Academia Sinica Contribution No. 1 from the Experimental Marine Biological Laboratory     

煤显微组分分离富集

单组分成烃热模拟实验已成为煤成烃研究的重要组成部分，煤显微组分分离是上述研究的重要前提。实验结果证明：单纯应用某一种方法效果往往不佳，而采用人工碎样→筛选法→浮选法（沉淀法）→高速离心法这一综合的显微组分分离方法，则可以获得高纯度的显微组分。     

用长效肥料提高微生物分解海面油膜试验

氮和磷是限制海洋油污生物降解的重要因素,采用可被微生物分解的两种蜡的混合物,把含有10:1的氮和磷的无机盐粉末包埋起来,制成亲油性且能与油膜漂浮在一起的长效肥料。在室内进行促进海水表面柴油油膜的生物氧化实验,结果表明:制备的长效肥料有促进油膜中烃类氧化微生物的生长和柴油的生物降解作用,实验9天除油率达到57 4％,对照实验仅24.5％。     

Application of purple nonsulphur bacterium Rhodopseudomonas sp.in spat rearing of Bay Scallop Argopecten irradians irradians

ＡｐｐｌｉｃａｔｉｏｎｏｆｐｕｒｐｌｅｎｏｎｓｕｌｐｈｕｒｂａｃｔｅｒｉｕｍＲｈｏｄｏｐｓｅｕｄｏｍｏｎａｓｓｐ．ｉｎｓｐａｔｒｅａｒｉｎｇｏｆＢａｙＳｃａｌｌｏｐＡｒｇｏｐｅｃｔｅｎｉｒｒａｄｉａｎｓｉｒｒａｄｉａｎｓ￥／／Ｔｈｅｅｆｆｅｃｔｉｖｅ...     

黑鲷视网膜结构与视觉特性研究

黑绸Ｓｐａｒｕｓｍａｃｒｏｃｅｐｈａｌｕｓ（Ｂａｓｉｌｅｗｓｋｙ）视网膜中存在视杆、单锥和孪生双锥三种光感受细胞，视杆与视锥的比例较大，为６７：１。每一双极细胞接受约５—８个视杆的输入，每一神经节细胞接受约１７—２５个双极细胞输入，表明神经节细胞有较大的感受野。视网膜细胞这种形态组合有利于提高视网膜对光的敏感性，与黑鲷生存的浅海底层弱光环境相适应。黑鲷的视杆色素经测定为视紫红质ＶＰ４８５１（吸收光谱峰值为４８５ｎｍ），其吸收光谱与黑鲷栖息水层中日光能量分布相对应，也与该水层中的生物光场相适应。黑鲷暗视光谱敏感曲线峰值与视紫红质吸收光谱曲线相一致，均在４８５ｎｍ处。此外，黑鲷光谱敏感曲线存在普氏位移，表明黑鲷具有辩色力。