Types and spatial combinations of Danxia landform of Fangyan in Zhejiang Province

The prominent types of Danxia landform in Fangyan include enclosed valleys, mesas, peaks, stone columns and grooves etc. Their spatial combinations have regular configurations along the northwest–southeast direction: typical grooves and caves are located in the northwestern Wufengshuyuan mainly; abundant fresh collapsed stones may be observed in central Jimingfeng and Taohuafeng; stone drums and stone columns are in the southeastern Shiguliao particularly; enclosed valleys are encircling joints of peaks and plains from three directions east, west, and south. Their spatial combinations reflect that the developments of Danxia landform have undergone stages of geomorphic cyclical erosion in the form of weathering, collapse, transportation, sedimentation and other processes, together with the “sculpture” of external forces mainly as tectonic uplift. The picturesque Danxia landform began its formation at that point. Danxia landform developed mainly in the strata of Fangyan Formation (K1f) caused by the alluvial fan-braided river phase of anterior fan in the late period of the Early Cretaceous. Regular patterns of weathering of stones and features of braided alluvial phase sediments may be verified by the analysis of three groups of experimental data. Danxia landform of Fangyan is a unique representative of the “adolescent” development type in the application of the World Natural Heritages status in China, by virtue of its outstanding universal aesthetic and scientific value.     

浙江临安板桥奥陶系胡乐组笔石新材料及其意义

报道在浙江临安板桥奥陶系剖面的胡乐组中发现的较丰富的笔石动物群,包括Pterograptus elegans,Expansograptus sp.1,Tylograptus sp.,Cryptograptus?sp.,Archicli macograptus angulatus,A.caelatus,Procli-macograptus angustatus等主要属种,应属达瑞威尔阶Pterograptus elegans笔石带。这一发现表明,临安板桥一带的胡乐组时代跨度非常局限,底界比浙赣交界"三山地区"的胡乐组之底高2个笔石带,顶界对比则低2个笔石带。其下伏牯牛潭组的顶界与宜昌三峡地区相比,也低了2个笔石带,具明显的穿时现象。     

浙东火山岩型银矿成矿条件及勘查方法

本区火山岩型银矿赋存于上侏罗—下白垩统陆相火山岩中;由于中生代太平洋板块向西俯冲.大陆边缘火山岩浆活动强烈.嵊县—黄岩地区由于断裂为造、火山岩发育而形成南北向的矿化集中区.成矿与火山岩浆活动晚期的潜火山岩、脉岩有关.属于浅成中低温热液矿床.根据矿床围岩蚀变、矿化类型及成晕元素的分带规律,可指导找矿及预测隐伏矿床.并初步建立了勘查模式.总结了成矿预测、综合找矿、详细评价三个层次的勘查方法.     

输电线路运行安全影响因素分析及防治措施

以浙江省为例,进行省域冰区图绘制和杆塔尺度的输电线路评估。首先,利用覆冰生成数值模式,针对2005— 2014年覆冰灾害进行了逐小时0.01°× 0.01°分辨率的覆冰过程反演,结合Gumbel极值分布刻画各栅格超越概率分布并绘制浙江省冰区图;其次,通过多因素比较分析,建立基于高程要素的杆塔覆冰降尺度方案;最后,基于区域灾害风险评估方法,选取易损性评估模型,对浙江省输电线路覆冰灾害下的杆塔失效率给出了定量评估。结果显示,浙江省冰区呈北、中、南带状分布,且中部覆冰带可能强度最大;在当前气候背景条件下,忽略人为抗冰、融冰等作用,浙江省中部及北部的输电线路覆冰风险相对较高。

     

厄尔尼诺现象和浙江近海鲐鲹鱼渔获量变化关系──长江口ENSO渔场学问题之二

本文研究浙江近海1970年到1992年鲐鱼渔获量变化与Elnino现象的关系，结合捕捞强度，长江中下游汛期（4—9月）降水量距平年际变化综合分析，探讨浙江近海鲐鱼渔获量变动规律，为合理开发渔业资源提供科学依据。     

浙江省丽水地区白垩纪红层盆地火山岩年龄及其构造意义

为查明丽水地区火山活动与盆地形成、演化之间的关系,在碧湖盆地、章村盆地、丽水盆地等红层盆地区域地质调查基础上,对盆地内中性－酸性火山岩夹层进行了精确测年和岩石化学分析,火山岩岩石地球化学表明,碧湖盆地、丽水盆地、章村盆地岩石化学成分基本一致。火山岩LA-ICP-MS 锆石U-Pb测年表明：碧湖盆地朝川组火山岩年龄为(123±2) Ma,章村盆地馆头组火山岩年龄为(111±3)Ma,丽水盆地塘上组火山岩年龄为(95±1)Ma。该地区盆地间火山岩夹层存在28 Ma时差,反映了丽水-余姚断裂带的活动延续性。     

东海台风出现次数以及在我省沿海登陆的分析与预测

根据３７年（１９５３～１９８９年）的有关气象资料分析表明,浙北地区当年３月温度,上年４～６月降水量,秋、冬季干湿度和年积温与当年东海热带气旋（指强度达到热带风暴以上的热带气旋以下统称台风）出现次数之间有着密切的相关性。在此基础上进一步分析了前期一些气象要素与登陆台风之间的关系,并由此分别建立预报东海台风出现多寡和台风是否登陆的判别式。从其拟合和试报结果来看,效果令人满意。     

浙东白垩纪双峰式火山岩Sr、Nd同位素组成及其成因意义

浙东白垩纪火山岩以发育双峰式岩石组合为特征,其成因一直是有争议的问题。本文从其两端元岩石——玄武岩和流纹岩的Sr,Nd同位素特征出发,论证了玄武岩起源于经过俯冲来源的物质交代(或混染)的富集型地幔楔,流纹岩主要由古老变质基底重熔生成,并与玄武岩岩浆发生过低度混合。在混合过程中,玄武岩的Sr同位素组成基本未受到影响,Nd同位素组成可能发生一定的变化;流纹岩的Sr同位素组成则有明显改变。     

Phosphorus forms and distribution in Zhejiang coastal sediment in the East China Sea

Surface and core sediment samples were collected from Zhejiang coastal waters of the East China Sea to study phosphorus（P） forms and understand the potential release of P as well as adsorption.The sediments were extracted sequentially to determine four phosphorus fractions,and non-sequentially for total phosphorus（TP）.The total concentration of phosphorus in the surface sediments ranged from 527.2 to 680.5 mg kg-1.Inorganic P was the major form and accounted for 84-94%of TP.Among the four forms,P-Detrital was dominant（58.6-73.2%）,followed by P-CDB（10.5-20.9%）,P-Organic（6.1-15.9%）,and P-CFA（5.9-16.3%）.The distribution pattern of TP in the surface sediments was similar to that of P-Detrital and P-Organic,but different from P-CDB and P-CFA.A relatively high level of phosphorus was observed in estuarine sediments,reflecting the influence from terrestrial input.Phosphorus in all forms in core sediments at each station decreased with depth.In addition,potentially bio-available phosphorus accounted for 20-34%of TP.     

葛坪铅锌矿地质特征及成矿阶段划分

葛坪铅锌矿是一个多阶段形成的中温热液充填交代矿床,主要的矿化类型有脉状、稀疏和稠密浸染状等。本文阐述了葛坪铅锌矿的基本地质特征,并通过在野外对矿床不同的成矿作用及矿化蚀变的观察研究,及室内对矿石结构、构造、矿物组合及先后关系的研究,将矿床的形成划分出五个成矿阶段：1早矽卡岩阶段;2晚矽卡岩阶段;3脉状铅锌硫化物阶段;4硫化物-石英阶段;5方解石阶段。