佩戴黑色项链四法则     

宝儿 《黑龙江国土资源》2009,(3):63-63

黑色是时尚领域中永恒的色彩。配合今季时装秀场上的黑色热潮，饰品界也笼罩上一片黑色魅影。虽说春日是绿色的天下，不过想要拥有一点不同的春季造型，就在服饰搭配上做点黑色文章。  相似文献   

陕西省商南县湘河地区钒矿成矿特征及成因   总被引：1，自引：0，他引：1  

李赛赛  魏刚锋  聂江涛  许运涛  李小兵 《地球科学与环境学报》2009,31(3):236-244

通过野外地质调查和室内岩石学、岩石化学、稀土及微量元素地球化学分析,深入研究了陕西省商南县湘河地区钒矿床的成矿特征,并探讨了该类矿床的成因.研究结果表明,该区钒矿主要产出于青石峡-余家台倒转复式向斜两翼下寒武统水沟口组下岩段硅质岩夹泥岩的泥岩中,矿体产状与地层产状基本一致;钒矿床中所有岩石都含有较高的SiO2,硅质岩以隐晶质石英和玉髓为主,有沉积成因重晶石;V与Cr、U、Ba相关性好;稀土元素球粒陨石标准化模式具有或正或负的Ce异常和明显的Eu正异常、向右倾的图形.上述特征都反映出该地区钒矿床具有典型的海底热水流体特征,此类钒矿床可称之为海底热水(喷流)沉积矿床.  相似文献   

The black water around the Changjiang (Yangtze) Estuary in the spring of 2003   总被引：4，自引：0，他引：4  

BAI Yan  HE Xianqiang  PAN Delu  ZHU Qiankun  GONG Fang 《海洋学报(英文版)》2009,28(4):23-31

The Changjiang (Yangtze) Estuary is located in the East China Sea shelf with shallow water. Affected by the tide mixing and the runoff of the Changjiang River and the Qiantang River, the turbidity is very high. Generally, the water-leaving radiance is high in the turbid water because of the large particle scattering. Based on the in-situ data and ocean color remote sensing data of SeaWiFS, it was found that there was a black water region with the normalized water-leaving radiances less than 0.5 mW/(cm2·μm2·...  相似文献   

钼镍矿床地质特征及找矿标志     

曹承清 《国土资源情报》2009,(10):33-36

本文对湘西沉积型钼镍矿床地质特征进行了总结分析，对开展湘西北地区钼镍矿找矿具有一定指导意义。  相似文献   

甘肃境内之中性及基性火山岩     

李树勳 《地质论评》1946,11(Z2):223-232

甘肃境内地质情形经过二年来之调查已略知梗概,关于各种岩石之分布,虽未经专人研究,但已知其端倪;本文之作,系将甘境火山岩之分布及性状,作一介绍,而就教于同道者。  相似文献   

寻梦南湾湖     

孙利芳  刘予平 《资源导刊(河南)》2014,(9):50-55

南湾湖属于位于秦岭一昆仑东西复杂构造带之南亚带东延部分与淮阳山字型步弧两翼衔接地带。东西向构造在本区起控制和主导作用,地质土与南湾水库较密切的是片麻岩,片岩岩组和第四系松软组。水库坝址地层为震旦系,下古生界信阳群龟山组是—套浅变质岩系,石英云母片岩,铁质云母,炭质云母,其次为少量中生代晚期侵入的火山岩,第四系松软堆积物。  相似文献   

Use of tetracycline hydrochloride and alizarin complexone for immersion marking black rockfish Sebastes schlegelii     

吕红健  张秀梅  付梅  席丹  高天翔 《中国海洋湖沼学报》2014,32(4):810-820

We tested the utility of chemical marking techniques in the juvenile black rockfish Sebastes schlegelii. Juveniles(30–40 mm total length) were immersed in a range of tetracycline hydrochloride(TC) solutions at concentrations ranging from 300 to 500 mg/L, and alizarin complexone(ALC) solutions at concentrations ranging from 200 to 400 mg/L in filtered sea water(salinity of 30) for 24 h, respectively. Otoliths(sagittae, asteriscus), scales, fin rays(dorsal, pectoral, ventral, anal, and caudal fin rays), and fin spines(dorsal, ventral, and anal fin spines) were sampled and used to detect fl uorescent marks after a 60-day growth experiment. With the exception of 300 mg/L TC, acceptable marks were produced in the otoliths and fin spines by all concentrations of TC and ALC. In particular, we observed clearly visible marks in the sagittae, asteriscus, and fin spines under normal light at concentrations of 200–400 mg/L, 250–400 mg/L, and 250–400 mg/L ALC, respectively. Scales and fin rays had acceptable marks at much higher concentrations(≥350 mg/L TC, ≥250 mg/L ALC for scales and ≥350 mg/L TC, ≥300 mg/L ALC for fin rays). The best mark quality(i.e., acceptable marks were observed in all sampled structures after immersion marking) were obtained following immersion in TC at between 350–500 mg/L, and ALC between 300–400 mg/L. In addition, there was no significant difference in survival and growth of TC and ALC marked fish compared to their controls up to 60 days post-marking( P 0.05).  相似文献   

陕西镇坪地区唐家垭子钼钒多金属矿床地质特征与成因     

李普涛  温志亮  赵民  王锋  叶健华 《地球科学与环境学报》2014,(4)

陕西镇坪地区唐家垭子钼钒多金属矿床是近年来新发现的钼钒矿床,含矿地层及矿化带延伸情况显示其具有达到大型规模的潜力。矿体产于寒武系下统鲁家坪组黑色岩系,与地层展布方向一致,受黑色岩系控制;矿石类型有含炭板岩型、粉砂质板岩型及含炭硅质岩型3种;矿石含钼矿物主要有铁钼华、钼华、胶硫钼矿等,钒主要存在于钒云母中,其次为高岭土、电气石等;矿石化学成分以Mo、V2O5为主,主成矿元素为Mo、V,伴生金属元素有Ag等。矿床地球化学综合分析认为,寒武系下统鲁家坪组为(较封闭的)浅海盆地相;含矿地层鲁家坪组的Mo、Cu、Ni、Pb含量分析表明,沉积的深度可能大于250m;w(Ni)/w(Ti)、w(Cu)/w(Ti)值表明,沉积的离岸距离为100~300km;w(V)/w(Ni)、w(V)/(w(V)+w(Ni))值反映成矿期处于缺氧—强缺氧的还原沉积环境;矿床地质地球化学分析表明,该矿床为明显的深海冷水沉积型矿床。  相似文献   

滇东北下寒武统黑色岩系钼、镍矿床特征及找矿前景     

孟贵华 《云南地质》2014,(4):489-497

滇东北地区钼镍多金属矿床主要产于下寒武统筇竹寺组黑色页岩、黑色粉砂岩地层中,矿体与围岩界线明显,呈似层状、层状产出,为层控矿床。矿体厚度薄、品位高,但往深部有变富、变厚的趋势.  相似文献   

湘鄂西—渝东地区牛蹄塘组页岩气勘探前景评价     

王佳  李小刚  黄文明 《地质科技情报》2014,(4)

综合利用沉积学、岩石学和地球化学分析手段,对湘鄂西-渝东地区下寒武统牛蹄塘组(与水井沱组对应)黑色页岩的页岩气形成物质基础(沉积相、岩性、有机质丰度及类型、成熟度等)、储集层特征(孔隙类型、X衍射特征)进行系统性研究后发现:①研究区牛蹄塘组以深水陆棚相沉积的黑色页岩、硅质页岩为主,厚度较大,分布广泛;②其w(TOC)平均值达1.84%,成熟度为2%~6%不等,达到成熟-过成熟阶段;③页岩孔隙类型以粒间孔、石英粒内溶孔、黄铁矿晶间孔为主,另有少量黏土矿物溶蚀孔洞;④页岩中石英质量分数为50%~80%不等,与美国Branett页岩具有较强的相似性,均呈两段式。对于页岩气勘探前景评价而言,除了优越的页岩气物质基础条件外,后期硅化程度、埋藏深度、后期构造改造强弱等因素同样起着举足轻重的作用。  相似文献