浙江南部近海主要鱼类的时空生态位及种间联结性

基于2016年8月(夏季)、11月(秋季)、2017年3月(冬季)、5月(春季)浙江南部近海的鱼类调查数据,利用生态位宽度、生态位重叠、聚类分析、方差比率法、卡方检验、联结系数以及种对共同出现百分率对主要鱼类种间关系进行研究.结果表明:(1)调查共采集鱼类169种,主要鱼类共有26种;(2)在空间维度上,日本鲭(Sco...     

腾冲地热区高温热泉水中稀土元素特征

腾冲地热区位于印度-欧亚板块碰撞带东北缘,构造和岩浆活动频繁,地热作用明显,热泉广泛分布,是现代热泉研究的天然实验室。热泉水中的稀土元素特征是指示浅层水岩反应的重要指标。由于热泉水中稀土元素含量较低且变化范围大,腾冲地区热泉水稀土元素组成的报道比较罕见。本文尝试研究了腾冲高温热泉水中稀土元素组成特征,并与美国内华达州贝奥沃韦地热田和加利福尼亚希伯地热田热泉水的稀土元素特征进行了对比。本文选取腾冲地区的高温热泉,应用ICP-MS,测试了热泉水中稀土元素。分析结果表明热泉水中稀土元素含量相对较低且变化范围较大,其变化范围为球粒陨石的10-5～10-2倍。稀土元素球粒陨石标准化配分模式整体为轻微右倾型或平坦型,显示轻重稀土分异不明显;δEu既有正异常也有负异常;各热泉点热泉水稀土配分模式之间存在差异。虽然腾冲地热区热泉水的REE含量比美国贝奥沃韦地热田和希伯地热田热泉水的高10倍,两者之间的稀土元素分布特征具有一致性。热泉水中的δEu负异常为深循环的大气降水与具有负铕异常火山岩水岩反应的结果,正铕异常可能是由快速上返的大气降水与蒸发岩中的石膏反应导致。     

河南荥阳孤柏嘴黄土剖面磁性地层学初步研究

河南荥阳孤柏嘴黄土剖面古地磁研究表明 B/ M界线位于 S8上部 (剖面 1 1 9.4 m处 ) ,80多米厚的马兰黄土中发现 4层弱发育的古土壤。古地磁研究结果为邙山黄土地层的划分提供了重要的时间控制 ,为南水北调中线工程穿黄工程的设计提供了重要的基础 ,并且表明该剖面在提取黄土沉积所记录的高分辨率的过去全球变化信息的研究中具有重要意义     

Unfilterable "geoaerosols", their use in the search for thermal, mineral and mineralized waters, and their possible influence on the origin of certain types of mineral waters

 Many articles describing the unusual mobility of solid particles in the subsurface layers of the Earth's crust have been published in the last decades, especially in the geological literature. In an attempt to explain this phenomenon, several hypotheses have been developed. The one closest to the behavior observed in nature is based on quantum mechanics. Based on this phenomenon, a new geological prospecting method called Molecular Form of Elements (MFE) was developed in former Czechoslovakia during the 1970s. It has been widely applied since for various types of prospecting, including the search for thermal and mineral waters. When using the MFE method for prospecting, the relationship between the ascending mineral springs and the four directions of structural faults was discovered. The possibility of whether a process, similar to the one acting during the absorption of elements when using the MFE method, can be a source of dissolved solid particles during the creation of mineral waters is also discussed. Received: 3 March 2000 · Accepted: 11 July 2000     

宁南深埋岩溶水勘查的物探新技术

本文通过了分析宁南深埋岩溶水的勘查特点，提出了应用目前国际上先进的频率域电磁测深法即EH－4导导率成像系统和时间域电磁测深法即TEMS－3S瞬变电磁测深系统等物探新技术在宁南进行深埋岩溶水的勘查工作，并对上述两种新技术的应用条件进行了分析，给出了两个应用实例，最后对物探技术勘查深部岩溶水，基岩裂隙水的工作中几个主要问题进行了探讨。     

Badgastein spa—Austrian central Alps

The Badgastein spa shows almost all the special geological and hydrological features existing in the northeastern central Alps. Situated within the Tauern window, the open joint system enables the infiltration of surface water to great depths. There it becomes heated and loaded with radon and trace elements such as fluor. The water discharges as thermal water springs at the steep right flank of the cascade of the Gastein-Ache. This hydraulic process occurs during a span of 3600–3800 years. The springs are captured in galleries, and the largest discharge is in gallery IX (2518 m³/d^–1). The spa became known worldwide in the 19th century by visiting aristocrats from Central and Eastern Europe. The most important event in the 20th century was the discovery of the heat joint in the Böckstein gallery. In 1940 an effort to reactivate gold mining in the Radhausberg near Böckstein south of Badgastein failed. However, the miners had the unexpected experience of being cured of rheumatism. A connection between the great depth and high temperature in the gallery was made by the discovery of the joint set with heat and radon emanation. In the medical stations of the Böckstein gallery treatment of polyarthritis has become especially successful.     

1991／1992年夏季南极普里兹湾邻近海域网采浮游植物的聚类分析

本文报道了１９９１／１９９２年南极夏季在普里兹湾邻近海域浮游植物调查的研究结果。经鉴定共有浮游植物３门２６属７８种；其平均细胞丰度为１２０±１７４×１０５个／ｍ３，密集区分布在６２°Ｓ、７８°～１０３°Ｅ，这一海域其细胞丰度在１１０×１０５～８６４×１０５个／ｍ３之间。根据浮游植物种类组成和细胞丰度百分比的聚类分析，测区浮游植物群落中可划分为四个聚合类群：菱形藻（Ｎｉｔｚｓｃｈｉａ）与赖氏针杆藻（Ｓｙｎｅｄｒａｒｅｉｎｂｏｌｄｉ）、长环毛藻（Ｃｏｒｅｔｈｒｏｎｃｒｉｏｐｈｉｌｕｍ）与翼根管藻（Ｒｈｉｚｏｓｏｌｅｎｉａａｌａ－ｔａ）和翼根管藻与赖氏针杆藻占优势的聚合类群及由海冰习性的菱形藻与近岸性角刺藻（Ｃｈａｅｔｏｃｅｒｏｓ）占优势组成的中山站近岸单一生态类群。文中还讨论了浮游植物丰度与环境因子的关系并对过去数年南极浮游植物的调查结果进行了比较     

The Speciation of (CH3)2Sn2+ in Electrolyte Solution Containing the Major Components of Natural Waters

Hydrolysis constants of dimethyltin(IV) cation, in different salt solutions (CaCl₂: 0.15 I 0.90; MgCl₂: 0.30 I 0.60; NaCl-–NaClO₄, NaCl-–NaNO₃ mixtures: I = 3; NaCl-–Na₂SO₄ mixtures: I = 1 mol dm^-3) were determined by potentiometric ([H⁺]-glass electrode) measurements. These data, together with previous data (De Stefano et al., 1996b) were interpreted in terms of DHT (Debye–Hückel type) and Pitzer equations. The mixed electrolyte solution results also allowed us to obtain and parameters for the Pitzer equation. Calorimetric measurements were made at different ionic strengths in order to find the temperature dependence of hydrolysis constants and of the relative interaction parameters. The body of results allows us to determine the speciation of natural waters in a wide range of ionic strengths and temperatures.