Ag_2S-Cu_2S-PbS-Bi_2S_3四元体系相关系研究(Ⅰ):相图和相关系

对Ag_2S-Cu_2S-PhS-Bi_2S_3四元体系500℃相图研究表明,整个体系相关系受十个组分范围变化大的固溶体和一个液相区控制。它们是:块硫铋银矿、铜银铅铋矿、硫铋铅矿、富硫铋铅矿、辉铋矿-针硫铋铅矿、方铅矿-杂硫铋银矿、硫铋铜矿和人工合成相CuBi_3S_5、Cu_3Bi_5S_8及新相“C”。此外体系内稳定的相是四元系端元相和辉铅铋矿。     

刘鸿允教授地质科学研究五十年

这是中国科学院地质研究所所长王思敬教授在祝贺我国著名地质学家刘鸿允教授从事地质科学研究五十年纪念会上敬献的贺诗。他高度概括和赞颂了刘鸿允先生在从事地质科学研究中,对地质所的发展和对我国地层学、古地理学、前塞武纪地质学(尤其在震旦纪)研究领域中作出的重要贡献。     

锂绿泥石的红外光谱研究

本文给出了产于河南和贵州的锂绿泥石红外光谱,以及光谱中各谱带的频率、吸收强度、主要谱带的归属和灼烧样品的红外光谱。这两个矿物的光谱与以前发表的锂绿泥石的光谱有差别,而和白云母、伊利石的光谱相似;文中给出了它们的鉴定特征。根据红外光谱认为,锂绿泥石的结构可能是复杂的,不含有H_2O形式的水;它更接近二八面体型结构。锂绿泥石灼烧到453℃时,OH根全部脱失,结构向非晶态转化,到800℃后,转变成莫来石、非晶态SiO_2和LiO_2。     

四川铜街子绿鳞石研究

本文利用X射线衍射仪、扫描电子显微镜等手段,研究了取自四川省铜街子某地凝灰岩和火山碎屑岩浅沼湖相堆积物夹层中的绿鳞石。对该矿物的化学组成进行的研究表明,它是一种比较典型的低镁型绿鳞石。     

Digital Geological Mapping of Sinus Iridum Area of the Moon Based on the Chang’E-I Data

Based on the CCD images,IIM data and DEM data of China＇s lunar exploration project （Chang＇E-Ⅰ） and related processed and analytic results,an integrated study of regional geology of Sinus Iridum and its adjacent area was conducted,and a series of relevant researches and analyses were carried out,including analysis of impact craters and their extrusive and accumulative materials,division of stratigraphic and tectonic units and classification of rock types,integrated analysis of chronology and lunar evolution history.In consideration of crater＇s shape features,quantity and preserving status of filling materials,the lunar impact craters can be divided into 7 types and 11 subtypes,and the accumulative materials of craters are divided into 6 types and 9 accumulative groups.According to the content and distribution of TiO2 and image characteristics,the basalts are divided into high-TiO2,medium-TiO2 and low-TiO2 basalts.Discussion was made on division of tectonic units and evolution features in the study area.The geological map of the Sinus Iridum Quadrangle （LQ-4） at a scale of 1∶2.5 M was preliminarily compiled with the ArcGIS system,and the spatial database of the map was established.Related technical specification,procedure and method for lunar geological mapping have been worked out,so as to lay a foundation for the forthcoming geological mapping of the global Moon in China by using the data of Chang＇E-Ⅱ and also for comprehensive study and geological mapping of other celestial bodies in the future.     

海洋与湖沼1993年总目录第24卷

第1期均匀水底上二维随机波面的二阶谱·································……孙孚、丁平兴、余宙文(1)杭州湾潮波三维数值模拟....········..··········································……李身铎、顾思美(7)渤海局部海域风暴潮漫滩的数值模拟··········································……史峰岩、孙文心(16)用实测海水透明度数据和NOAA卫星数据计算黄海悬浮体含量···············…     

Conodonts from the Sesong Slate and Hwajeol Formation (Guzhangian to Furongian) in the Taebaeksan Basin, Korea

Abundant conodont elements have been recovered from the Hwajeol Formation, to allow five zones to be erected: Proconodontus, Eoconodontus notchpeakensis, Cambrooistodus minutus, Cordylodus proavus, and Fryxellodontus inornatus-Monocostodus sevierensis-Semiacontiodus lavadamensis zones, in ascending order. More confident biozones are recognized in the Sesong Slate and lower Hwajeol Formation in the Makgol section, a part of the southern limb of the Baekunsan syncline, Taebaeksan Basin, Korea, especially focusing on the conodont biostratigraphic boundary of two units, and the subdivision potential of the previous "Proconodontus Zone", lowermost biozone of the Hwajeol Formation. Similarly, only a few conodont elements recovered from upper 14.5 m interval, namely the Furongian portion of the Sesong Slate, in the Makgol section did not allow erection of a biozone. Nevertheless, this part of the unit plus the basal 2.5 m interval of the Hwajeol Formation is characterized by the occurrence of Prooneotodus rotundatus(Druce and Jones), Teridontus nakamurai(Nogami), Phakelodus elongatus(An) and Phakelodus tenuis Müller. This interval marks the early Furongian "Prooneotodus rotundatus Zone". The rest of the measured section yielded relatively abundant conodonts, so three conodont biozones are proposed, based on the successive appearance of key species: Proconodontus tenuiserratus, Proconodontus posterocostatus, and Proconodontus muelleri zones, in ascending order, and thus allowing subdivision of the previous "Proconodontus Zone". The four conodont biozones are correlated with the relevant biozones of North and South China, and North America.     

A New Fossil Hangingfly (Mecoptera: Cimbrophlebiidae) from the Early Cretaceous of China

A new species, Cimbrophlebia rara sp. nov., in the family Cimbrophlebiidae（Mecoptera） is described and illustrated. This specimen was collected from the Early Cretaceous Yixian Formation at Liutiaogou in Inner Mongolia, China. This is the first record of a cimbrophlebiid from the Jehol biota. A key to all species of Cimbrophlebia is given. A preliminary review of published taxa data indicates that from the Middle Jurassic to the Early Cretaceous, Mecoptera became less diverse and less abundant in northeastern China at familiar level（from 11 to 6）, generic level（from 32 to 8） and specific level（from 44 to 14）.     

Collision Tectonics between the Tarim Block (Basin) and the Northwestern Tibet Plateau: New Observations from a Multidisciplinary Geoscientific Investigation in the Western Kunlun Mountains

New results from deep seismic reflection profiling, wide-angle reflection-refraction profiling and broadband seismic experiments reveal that a series of south-dipping reflectors occur on the southern margin of the Tarim block (basin). However, it is these south-dipping structures that are intercepted by another series of north-dipping reflectors at depths from 30 to about 150 km beneath the foreland of the W Kunlun Mountains. No evidence from the above geophysical data as well as geochemical and surface geological data indicate the southward subduction of the Tarim block beneath the W Kunlun Mountains (NW Tibet plateau), forming the so-called "two-sided subduction" model for the Tibet plateau as proposed by previous studies. So the authors infer that the tectonic interaction between the Tarim block and the W Kunlun block was chiefly affected by a "horizontal compression in opposite directions", which brought about "face-to-face contact" between these two lithospheric blocks and led to the thickening, sh     

New specimens of Stenocybus acidentatus (Therapsida: Dinocephalia) from the Middle Permian Dashankou Fauna of China

The basal dinocephalian clade Stenocybusidae was known from two incomplete specimens representing one generus,Stenocybus,from Dashankou fanua in Yumen,Gansu Province of China.The holotype of Stenocybus acidentatus is laterally compressed,making some characters unclear.Here we describe two new specimens of Stenocybus acidentatus from the same locality,an anterior portion of skull with articulated jaws,and a right dentary with nearly complete dentition.They show some detailed features on the morphology of the premaxilla,maxilla,nasal,external nares and dentary.The phylogenetic relationship between Stenocybus acidentatus and the relatively large Sinophoneus yumenensis is still difficult to determine,and needs more new complete material and further evidences.