NOTE ON A STONE METEORITE FROM EASTERN KIANGSI

Ⅰ. INTRODUCTION Records of meteorite fall were constantly kept among Chinese books on history or geography, but very few specimens have been actually collected and preserved for scientific study. So far as the writer is aware, only two occurrences have been until now definitely reported and the specimens microscopic-     

淅川石煤钒矿提取技术的研究

石煤提钒技术关键是钒的氧化和转化。浙川石煤中钒主要有V~(3+)和V~(4+)形式存在,以类质同象取代粘土矿物二八面体中Al~(3+)。钒的价态分布研究表明,低温时有机质和黄铁矿决定了钒的价态,在370℃(风化样)或490℃(原样)V~(3+)全部氧化至V~(4+);高于800℃V~(4+)不再氧化至V~(5+),反应处于动态平衡,此时ηV~(5+)达91％。同时讨论了氯化钠在提钒过程中的氧化和转化作用,石煤钠盐氧化焙烧提钒的最佳条件:矿:盐=100:15,800℃,30分钟,η_培为67.4％。实验表明,焙烧气氛对钒转化有很大影响,氧化—氯化焙烧技术提高η_培6％。     

GEOCHEMICAL AND MINEROLOGIC STUDY OF A STONY METEORITE FROM THE VICINITY OF THE VILLAGE OF SEVRYUKOVO

In studying the conditions of formation of stony meteorites, we assume that 1) they are fragments of asteroids fallen to the surface of the earth. During their flight through the atmosphere, the meteorites develop a melted surface layer but their texture and mineralogic composition remain unchanged. 2) According to V. M. Goldschmidt, stone meteorites crystallize in a lesser gravity field than that of the earth, which is the reason for their chondritic texture and high porosity (about 4%). 3) Meteorites were formed in a medium with a deficiency of free oxygen. As a result, part of their iron and nickel was segregated as native metal; in addition, lawrencite and oldhamite, sulfides typical of meteorites, were formed.

We identify three stages of meteorite formation: magmatic, pneumatolytic, and hydrothermal. The interval 1450-850°C. corresponds to the magmatic stage at which a silicate phase and native iron with nickel were formed. As a result of thermal dissociation of water and because of the deficiency of oxygen required for a complete oxidation of metals and carbon, in the gaseous phase, free oxygen and H₂O were absent and the phase consisted probably of H₂, CH₄, CO₂, and CO.

The temperature interval 750-500°C. corresponds to the pneumatolytic phase. Here, H₂S, CH₄, CO₂, and CO were the principal agents of the gaseous phase. CH₄ was formed in a high temperature reaction between hydrogen and elementary carbon. As the temperature dropped to 750°C., electrolytic dissociation of H₂O rendered possible the formation of sulfides, especially of troilite.

Mineralization at the hydrothermal stage with a temperature interval of 400 to 300°C. has been observed only in carbon meteorites with a considerable graphitic carbon content. Here, a small portion of the ferrous iron is oxidized to the ferric, in the presence of CO₂ and at a temperature of 450° to 500°C.; the iron sulfide so formed is represented by pyrrhotite. Simultaneously, colored silicates are chloritized, with a separation of CaCO₃.—Auth. English summ.     

陕北三叠系上统延长油层中海绿石的发现及其初步研究

本文对陕北三叠系延长群延长油层中的海绿石——延长海绿石进行了分析研究。结果表明,延长海绿石的矿物学特征与一般海绿石相同,其扩展层含量19%,属于无序低钾云母型结构。碳同位素及微量元素分析表明,延长海绿石系陆相淡水-半咸水湖泊环境下的自生矿物,延长海绿石存在于湖泊三角洲前缘远沙坝或三角洲间湖湾的粉-细砂岩中,也常与自生黄铁矿共生,其形成时水深为50-100m。海绿石的存在指示着该处为弱还原环境,对于成油较为有利。因此,在陆相湖泊三角洲环境中,也应当建立海绿石地球化学相。     

玄武岩石材矿尾砂应用实验研究

针对玄武岩质建筑石材矿山产生的废弃物（碎石和尾砂）,依据环氧树脂有机胶黏剂的热固成型原理,使用环氧树脂乳液、有机固化剂和无机胶黏剂对废弃物进行复合石材试验.经物料均匀搅拌、模具成型、热压机施压和样品干燥、抛光、切边、修整等工序试制复合石材.通过测试复合样品的物理性能参数,其抗折强度超过天然石材商品,其他指标也基本达到相应建筑石材产品的质量标准.这种矿山废料的再利用方法,对减少矿山尾砂、治理环境污染、变废为宝以及增加企业经济收益有一定的作用.     

塔里木北缘库车坳陷侏罗系阳霞组的双壳类化石及其时代

系统采集并研究了塔里木盆地北缘库车坳陷库车河剖面阳霞组的双壳动物化石，讨论了化石组合特点及其地质时代，根据化石组合面貌、岩性和沉积特征以及剖面结构，认为阳霞组的时代应为早侏罗世晚期，与北缰地区的三工河组相当。     

SOME EARLY TRIASSIC AMMONOIDS FROM THE NORTHERN CAUCASUS

Ammonoids of early Upper Scythian age are described from three localities in the Northern Caucasus. No data on relative stratigraphic position is given, but some forms are common to the different exposures and the author concludes that all the ammonoids are Upper Scythian (Olenekian). Affinites with Pacific faunas are stressed and the faunules are correlated with the Owenites zone of North America. Two new genera (Parinyoites and Subowenites) and three new species (Dieneroceras caucasicum, Parinyoites ,mastykensis, Subovvenites slavini)are proposed. Flemingites pulcher Waagen, Wyomingites aplanatus (White), Parussuria compressa (Hyatt and Smith), and Owenites koeneni (Hyatt and Smith) are described and figured. Parinyoites differs from Metinyoites in having rounded saddles and it lacks the keel and costation of Inyoites. Subowenites has reticulate ornamentation, unlike Owenites, Parowenites, and Pseudowenites; it also lacks the adventive notches in the median saddle of Pseudowenites. --E. T. Tozer.     

桂北地区锡多金属矿床中锡石的成因矿物学研究

本文系统地研究了桂北地区锡多金属矿床中锡石的产状，化学成分，微量元素及稀土元素，晶胞参数，物理性质，红光谱，流体包裹体和氢氧同位素组成等特征，说明本区锡石在时空和成因上与基性－超基性岩有着密切联系，同时明显受雪峰期黑云母花岗岩和四堡群变质岩影响，具明显的多期多阶段，多物质来源多，成因特征，其锡石的化学成分，微量元素及稀土元素，物理性质和地球化学特征等方面不同于国内外其它锡矿中不同产状和成因类型的锡     

安徽亳县陨石不透明矿物研究

毫县陨石的不透明矿物有陨硫铁、铁纹石、镍纹石、镍黄铁矿、镁铁尖晶石、自然铜、石墨、方铁矿、铬铁矿、钛铁矿、磁铁矿、张衡矿及x矿物等。本文对它们进行了反光显微镜鉴定、X射线分析、反射率测定和电子探针分析。总结了不同化学群的球粒陨石中FeO和MgO的含量变化规律。     

藏北羌塘中侏罗世沟鞭藻

在藏北羌塘盆地中生界烃源岩成烃母质研究的一块标本中 ,发现了丰富且保存良好的沟鞭藻化石 ,至少包括有 2 1个属、 3 2个种的组合。这个组合以旋沟藻型占统治 ,大量发育栉型孢囊 ( ctenidodinioid) ,尤以 Ctenidodinium combazii居首位 ,其次为 Ellipsoidictyum cinctum和L ithodinia 的种 ,还有 Ctenidodinium continuum,C.ornatum,Gongaulacysta jurassica,Systematophora penicillata,Tubotuberella dangeardii和 Valensiella ampulla等中侏罗世巴统期至卡洛期的常见分子参与。根据组合面貌和属种成分的已知地史分布 ,其时代可确定为巴统期( Bathonian)或可能延至早卡洛期 ( Callovian)。沉积环境为正常盐度的开阔海 ,与欧洲诸海域可以沟通。本文还对 3个重要种进行了系统描述     

SOME URALIAN CORALS FROM NORTHERN KUANGSI COLLECTED BY DR.V.K.TING IN 1930

The specimens described in the present contribution were collected byDr.V.K.Ting in 1930 at the fort of Kungchishan,Nantanhsien,Kuangsi Pro-vince,Loc.T241 (广西南丹县公鸡山) The containing rock is a lightgrey limestone full of Funsulinoids,which,according to Mr.S     

新疆北部石炭纪单体珊瑚新资料

文中描述的10属10个新种单体珊瑚,全部是小型角锥状、弯锥状,具中轴者居多.系发育边缘厚结带,鳞板不发育的类型.其中Rylstonia,Fasciculiamplexus,Homalophy-llites.and Tetralasma等在新疆属首次发现,不仅丰富了本区石炭纪珊瑚的属种,而且为相关地区石炭纪地层的对比提供了新的依据.同时也证明当时的北极海与我国的北方海槽及华南海是相互沟通的.     

北大巴山碱质基性—超基性潜火山杂岩的辉石矿物研究

北大巴山碱质基性-超基性潜火山杂岩中有7种岩石含有新鲜的单斜辉石,它们分属于透辉石、普通辉石及霓辉石。单斜辉石可划分为5种成因类型:(1)斑晶、微斑晶及微晶;(2)深源捕虏晶;(3)半同源捕虏晶;(4)异源捕虏晶;(5)地幔型捕虏晶,本文涉及前4类辉石。单斜辉石的研究表明:(1)7种含辉石的岩石为同源岩浆结晶分异作用的产物,源岩浆为碱性-过碱性幔源岩浆。(2)初始岩浆形成于77km以下深度,上升过程中岩浆曾在3个不同深度储积。(3)岩浆上升至近地表处,在冷凝固结前曾有多次潜火山隐爆活动发生。(4)霓辉石捕虏晶的出现代表区内存在另一种碱基性岩浆活动。(5)辉石成分指示碱质基性-超基性次火山杂岩形成于陆边板内裂陷带。     

SOME URALIAN CORALS FROM NORTHERN KUANGSI COLLECTED BY DR.V.K.TING IN 1930

The specimens described in the present contribution were collected byDr.V.K.Ting in 1930 at the fort of Kungchishan,Nantanhsien,Kuangsi Pro-vince,Loc.T241 (广西南丹县公鸡山) The containing rock is a lightgrey limestone full of Funsulinoids,which,according to Mr.S Chen of Shang-hai,include the following species:     

陨石熔壳研究

本文通过对毫县陨石熔壳的化学成分分析,Ｘ射线物相分析和红外光谱分析,并与一岩相互对照,讨论了熔壳中Ｆｅ的氧化状态的变化、击变玻璃及主要矿物结构参数的变化;研究了熔壳的氧化作用、击变作用、击变作用下矿物的变形机制,同时,熔壳的ＳＥＭ显微 貌像给出了熔壳的一套完整剖面,从而讨论了熔壳的烧蚀作用主要有破碎作用,熔融作用和抽蚀作用三种方式。此外,透射电观察敢证实了陨石熔壳中石英玻璃的存在。     

北秦岭榴辉岩Sm-Nd同位素年龄

采自陕豫交界秦岭群中的榴辉岩主要由石榴子石和绿辉石组成，同时还含有少量的角闪石和金红石。本工作由四个单矿物和全岩五个样，测得Sm－Nd等时年龄为400±16Ma，（r＝0．997575），εNd＝十3．6，说明在加里东期北秦岭造山带发生过高压变质事件。     

南海北部深海花粉记录的环境演变

本文报道了南海北部深海沉积物中花粉的研究结果。所研究的17940孔长13．30m,包括最近4万年的沉积物。共鉴定统计103个样品,样品间距10cm,分辨率约为360a,自下而上分为3个花粉带和8个亚带。P1带(13．06～8．70m,约37000～15000aB．P．)以山地针叶树(Picea,Abies,Tsuga)花粉高含量组合与蒿属花粉占优势组合交替出现为特征,指示冷湿及温干频繁交替的气候。根据氧同位素资料该带相当于3期及本次盛冰期。P2带前期(P2-a亚带,8．70～7．23m,约15000～11300aB．P．)热带-亚热带常绿阔叶乔木花粉增加指示气候变暖,其中14000aB．P．前后红树林的高峰可能是海平面一度上升的结果;P2带后期P2-b亚带(7．23～660m,约11300～10000aB．p．)高山雨林及山地针叶树花粉增加指示气候变冷。根据氧同位素资料P2－a亚带与Bφlling－Allerφd升温期相当,而P2－b亚带属新仙女木期。P3带(660～0m,10000aB．P．至现在)为全新世,花粉组合以松属花粉占绝对优势,与现代南海北部表层沉积物中花粉组合相似,说明近万年以来南海北部气候与现代气候相近。近1400年来芒其孢子突然增加说明人类活动加剧。