关于小东沟组

小东沟组由王钰等(1954)命名。由于小东沟组内涵含混,自创建以来,已使许多地层工作者对小东沟组的涵义、时代的理解,特别是使用于区域地层划分和对比中造成了一定困难。作者从小东沟组岩石组合、生物群特征,以及在地层系统中的位置等方面对小东沟组涵义进行了重新厘定,认为小东沟组是独立于小岭组之外的晚侏罗世岩石地层单位。鉴于小东沟组存在的缺欠,作者建议在本溪东营坊、新宾东昌台、桓仁暖河子寻找模式剖面。     

河南卢氏—西峡地区小寨组的沉积相

石界河群小寨组主要为砂、泥质碎屑沉积,按岩性可分为四个组合,下部黑云母石英片岩与变质杂砂岩组合及变质副砾岩与变质杂砂岩组合为浊流及碎屑流沉积,上部的变质砾岩与变质含砾砂岩组合及变质杂砂岩、千枚岩组合为扇三角洲沉积。综合上述沉积相组合,提出小寨组并非大洋或深海盆地,而应为靠近陆源地的断陷盆地中的碎屑沉积。     

From Local Star Formation to Global Star Formation

In this brief report we summarise the most important points raised in the course of a two-hour evening discussion session on the above topic, organised by the author. Major questions that were debated included the universality of the IMF, the history of the star formation rate in the solar neighorhood, the star formation efficiency in molecular clouds, and the role of triggered star formation. The issue of a threshold gas surface density for star formation to occur was also critically discussed. This revised version was published online in September 2006 with corrections to the Cover Date.     

川西、藏东晚三叠世诺利期牙形刺

本文描述了采自藏东贡觉—江达地区上三叠统波里拉组(T_3b)和川西白玉地区上三叠统下逆松多组碳酸盐岩段(T_3~x~2)的牙形刺 Epigondolella postera 组合,成员包括 Epigondolella postera,E.sp.,Neogondolellanavicula。含上述牙形刺化石的地层时代为中诺利期。     

聂尔库组植物化石新材料及其地层意义

聂尔库组分布于辽宁东北部新宾县南杂木一带的苏子河盆地,为一套河湖相砂页岩沉积。该组含有较丰富的动、植物化石,但由于系统采集和研究不够,自建组以来,在地层时代和对比方面迄今仍是众说纷云。作者通过系统采集,共获植物亿石12属13种,化石组合面貌与英国威尔登植物群可以比较;与辽西的海州组、辽北—吉中营城组、黑龙江东部的穆棱组植物组合亦很相似,其时代大体相当于早白垩世尼殴克姆晚期。文中对我国首次发现的属种作了描述。     

宜章县梅田的晚二叠世地层不宜采用“泡水组”之名

泡水组系杨逢清、殷鸿福1987年新建的岩石地层名称,命名地点在广西来宾县泡水,层位与长兴组相当,时代属晚二叠世晚期。杨逢清,殷鸿福将泡水组引用到湖南宜章梅田长兴阶的地层。根据岩性特征,笔者认为宜章梅田长兴阶的地层不能冠用泡水组,只能沿用梅田组、九陂组和麻田组。     

羌塘雁石坪中侏罗统雀莫错组地层及沉积环境

本文详细描述了雁石坪附近一段地层剖面,并根据地层的岩石组合特征将其归入雀莫错组;依据古生物化石特征,将其时代划为侏罗纪早巴通期。沉积环境分析表明,雁石坪剖面为一套海侵的半咸水潮坪相沉积。     

The DynaMICCS perspective

The DynaMICCS mission is designed to probe and understand the dynamics of crucial regions of the Sun that determine solar variability, including the previously unexplored inner core, the radiative/convective zone interface layers, the photosphere/chromosphere layers and the low corona. The mission delivers data and knowledge that no other known mission provides for understanding space weather and space climate and for advancing stellar physics (internal dynamics) and fundamental physics (neutrino properties, atomic physics, gravitational moments...). The science objectives are achieved using Doppler and magnetic measurements of the solar surface, helioseismic and coronographic measurements, solar irradiance at different wavelengths and in-situ measurements of plasma/energetic particles/magnetic fields. The DynaMICCS payload uses an original concept studied by Thalès Alenia Space in the framework of the CNES call for formation flying missions: an external occultation of the solar light is obtained by putting an occulter spacecraft 150 m (or more) in front of a second spacecraft. The occulter spacecraft, a LEO platform of the mini sat class, e.g. PROTEUS, type carries the helioseismic and irradiance instruments and the formation flying technologies. The latter spacecraft of the same type carries a visible and infrared coronagraph for a unique observation of the solar corona and instrumentation for the study of the solar wind and imagers. This mission must guarantee long (one 11-year solar cycle) and continuous observations (duty cycle > 94%) of signals that can be very weak (the gravity mode detection supposes the measurement of velocity smaller than 1 mm/s). This assumes no interruption in observation and very stable thermal conditions. The preferred orbit therefore is the L1 orbit, which fits these requirements very well and is also an attractive environment for the spacecraft due to its low radiation and low perturbation (solar pressure) environment. This mission is secured by instrumental R and D activities during the present and coming years. Some prototypes of different instruments are already built (GOLFNG, SDM) and the performances will be checked before launch on the ground or in space through planned missions of CNES and PROBA ESA missions (PICARD, LYRA, maybe ASPIICS).     

鲁西寒武系第三统张夏组附枝菌与附枝菌微生物灰岩特征研究

本文通过大比例尺野外测量及镜下观察,对鲁西寒武系第三统张夏组的附枝菌与附枝菌微生物灰岩特征进行了详细研究。附枝菌是一种树枝状蓝细菌,一般向上生长扩展,形成灌木状附枝菌群落,生长于附枝菌微生物丘内部。而在微生物丘的外部边缘,附枝菌群落呈半闭合的房室状,与肾状菌十分相似。房室状附枝菌群落可能是在微生物丘外部边缘受局部高能微环境（如水流、波浪等）的影响形成的。在其形成后,其保存状态则是由附枝菌的钙化作用及早期成岩作用决定。由于附枝菌构成其微生物岩的生长骨架,且该微生物岩不具备清晰的中型构造,故可称其为附枝菌格架岩,作为对微生物岩分类命名的又一补充。附枝菌格架岩一般生长于台地边缘或台地外部斜坡环境,其生长过程受水动力条件、阳光照射及海水清澈度等影响。