呼和浩特市征地区片综合地价研究

土地征用补偿问题已成为我国土地管理和社会关注的热点问题。制定征地区片综合地价、“按价征地”是今后征地补偿制度改革的方向。本文通过对国内外征地价格研究进展的分析,应用征地区片综合地价测算原理,结合我国农用地的价格构成,采用定性和定量相结合的方法,探讨了征地区片综合地价应由农用地质量价格、社会保障价格、社会稳定价格和生态价格四部分组成。探索征地区片划分和征地区片价测算的方法。本文确定的呼和浩特市征地区片及其综合地价,空间上基本呈现出以呼和浩特市商业中心——民族商场为基点,随距离的增加,征地区片等级和征地区片综合地价依次降低的规律,且空间变化区域差异明显,符合屠能的农业区位论中“随距市场距离的增加,地租收入降低”的规律。将征地区片综合地价测算结果与现有征地补偿标准以及周边市、旗(县)征地补偿做比较分析,验证了征地区片综合地价评估方法的合理性。该研究成果可直接服务于呼和浩特市征地实施过程,为呼和浩特市农村土地市场的完善提供重要依据。     

汶川地震前后川滇块体应变与断裂变形特征研究

利用1999—2007和2007—2009年GPS资料,采用块体变形模型和GPS速度剖面研究了川滇地区的分阶段变形特征,结果显示川西北-滇中-滇西南块体主压应变率方向由北向南呈顺时针方向旋转;安宁河断裂、则木河断裂存在剪切应变积累,小江断裂南段以走滑为主、北段以应变积累为主;汶川地震对丽江-小金河断裂中南段、安宁河断裂和金沙江断裂有一定影响,对则木河断裂、小江断裂和红河断裂的影响较小。     

Neighbourhoods of isolated star forming dwarf galaxies

We report the discovery of small groups of uncatalogued, compact, star forming (SF) dwarf galaxies (DGs) by Hα mapping of the neighbourhoods of apparently isolated, catalogued, SF DGs. Our sample consists of dwarf  ( M ≥−18 mag)  galaxies at least 2 Mpc away from any other catalogued galaxy. The galaxies were selected to exhibit Hα emission of any intensity, i.e. not selecting only strong starbursts, as an indicator of recent or on-going star formation with the goal of understanding why are they presently forming stars. We identified possible neighbours by imaging the galaxies and their surroundings through Hα filters centred at or near the redshift of the galaxy, and searching for localized Hα emission with the characteristics of the line emission from the sample galaxies.
We identified 20 possible SF neighbour galaxies, 17 of them not previously catalogued, in three of the five search fields where we had good quality data, and present here their positions and, images and morphology, as well as some indications of binarity. The relatively large number of possible neighbour candidates, combined with their relative faintness, argue that it would be virtually impossible to identify truly isolated galaxies. It seems that the objects we selected as extremely isolated are probably the brightest members of sparse groups of galaxies, where the other members are also DGs that are presently forming stars. In order to enhance the confidence of this statement regular redshifts are required for our candidate neighbours.     

Constraints from deuterium on the formation of icy bodies in the Jovian system and beyond

We consider the role of deuterium as a potential marker of location and ambient conditions during the formation of small bodies in our Solar system. We concentrate in particular on the formation of the regular icy satellites of Jupiter and the other giant planets, but include a discussion of the implications for the Trojan asteroids and the irregular satellites. We examine in detail the formation of regular planetary satellites within the paradigm of a circum-Jovian subnebula. Particular attention is paid to the two extreme potential subnebulae—“hot” and “cold”. In particular, we show that, for the case of the “hot” subnebula model, the D:H ratio in water ice measured from the regular satellites would be expected to be near-Solar. In contrast, satellites which formed in a “cold” subnebula would be expected to display a D:H ratio that is distinctly over-Solar. We then compare the results obtained with the enrichment regimes which could be expected for other families of icy small bodies in the outer Solar system—the Trojan asteroids and the irregular satellites. In doing so, we demonstrate how measurements by Laplace, the James Webb Space Telescope, HERSCHEL and ALMA will play an important role in determining the true formation locations and mechanisms of these objects.     

B, V, I photometry of 20 dwarf irregular galaxies within 10 Mpc

CCD photometry is presented for 20 dIrr galaxies situated in the nearby complexes CenA/M83, and CVnI as well as in the general field of the Local Volume. We present integrated magnitudes of the galaxies in   B , V , I   bands and also surface brightness profiles to a median isophote  μ _B ∼ 28  mag arcsec⁻². The popular Sersic parametrization of surface brightness profiles generally does a poor job of simultaneously fitting the inner cores and outer exponential surface brightness fall-offs observed in many of our targets. The observed sample is a part of a general project to image about 500 nearby  ( D < 10 Mpc)  dwarf galaxies in multiple bands.     

南秦岭大堡组奥陶纪洋岛玄武岩的识别及其构造意义：来自地球化学和年代学证据

秦岭造山带以商-丹构造带为界分为北秦岭和南秦岭构造带.大堡组位于南秦岭构造带内,由灰色-深灰色的泥岩、粉砂岩和炭硅板岩,以及夹含炭硅质岩、灰岩和基性火山岩块体组成.在大堡组中出露的能干上和蚂蝗峡基性岩块夹于黑色的泥岩之中,岩石地球化学分析结果表明,SiO_2含量为41.53%～53.59%,富TiO_2为2.14%～3.58%,REE的总量为∑REE=282.3×10~(-6),轻稀土元素较重稀土元素富集[(La/Yb)_N=8.34],略显Eu正异常(Eu~*=1.13～1.25),具有较高的Ti/Y(300～622)和Zr/Y(3.8～7.4)比值.大离子亲石元素Rb、Ba和K相对富集,无明显的Nb和Ta异常,其Nb和Ta值为N-MORB标准值的10～20倍,为典型洋岛玄武岩(OIB)地球化学特征.锆石SHRIMP Ⅱ U-Pb测年获得能干上和蚂蝗峡基性岩块体分别形成于446Ma和455Ma.这些资料进一步表明,奥陶纪时期南秦岭存在着古洋盆.