铁辉砷镍矿的电子探针研究

借助电子探针、扫描电镜、Ｘ射线衍射等手段，研究了中、低温热液型金铜矿床中的铁辉砷镍矿。结果表明，该矿物由Ｎｉ、Ａｓ、Ｆｅ、Ｃｏ和Ｓ等元素组成。矿物的物理性质、光学性质和晶胞参数与辉砷镍矿相似或相近。     

原油中镜质体碎屑的检出及其地质意义

应用共聚焦激光扫描显微镜观察和分析了准噶尔盆地侏罗系原油，在国内首次发现这些原油中存在镜质体碎屑。这些镜质体碎屑均具有明显的棱角，其反射率值和侏罗纪煤的反射率值相近，且产出镜质体碎屑的原油均普遍检出了具有高等植物为母质输入的生物标志化合物。因此原油中镜质体碎届的检出为确认准噶尔盆地煤成油的存在提供了可靠的依据。     

钙稀土氟碳酸盐中四种B10S8新规则混层矿物的透射电镜研究

根据HRTEM研究，在四川西昌地区的钙稀土氟碳酸盐矿物衍生多晶体中发现了四种不同的B10S8型[即氟碳怖矿（B）／直氟碳钙铈矿（S）为10：8]新规则混层矿物（B10S8－I，B10S8－Ⅱ，B10S8-Ⅱ和B10S8－Ⅳ）。用SAED和HREM方法确定了四种新规则混层矿物的晶体结构对称性、晶胞参数、结构堆垛模式及晶体化学式等。四种B10S8新规则混层矿物结构中，Ce－F离子层的堆垛层序以及两个Ce－F离子层之间的碳酸根离子层的排列方式均不同。同时还观察到该类矿物中的畸结构及堆垛层错等。     

组合逻辑自动综合的超前试探法

自动逻辑综合是复杂组合电路设计中必须面对的问题之一。本文采用超前试探策略，在改进的Ｑ－Ｍ法基础上，提出了一个新的组合自动综合的新算法，该算法提高了运算速度，有较强的实用价值     

Newly Discovered Submicron-Scale Weathering in Quartz: Geographical Implications*

Quartz is regarded as one of the minerals most resistant to chemical weathering. Nevertheless, quartz does weather under certain conditions. Several geographic phenomena, including downstream sorting of fluvial sediments, the distribution of loess, and the absence of silica in tropical soils, may be directly or indirectly related to quartz weathering. Weathering may impact the use of quartz in geographic applications of geochronology and paleoenvironmental analysis. This paper defines the molecular-scale mechanisms of chemical weathering in quartz, and presents the first examination of quartz weathering in the terrestrial environment using high resolution transmission electron microscopy (HRTEM). HRTEM images illustrate crystalline disintegration, or amorphization, of exterior surfaces and internal fractures of quartz sand grains collected from tills of the Eastern Sierra Nevada, California. Of several alternative mechanisms, in situ hydration of the crystalline matrix is the most plausible for quartz amorphization. Scale and mineral structure appear to be prominent factors in quartz amorphization; microenvironment and weathering rates may also be significant, but data are insufficient to make more precise generalizations.     

辉石相变的矿物物理特征及滑石瓷老化机理的探讨

本文采用X射线衍射物相定量分析,透射电子显微镜及X射线电子能谱分析研究了原顽辉石→斜顽辉石的相变特征,提出了滑石瓷老化的实质是当原顽辉石Pbcn相向斜顽辉石P2_1/c相转变时,由于体积缩小和钡玻璃相拉应力的减少,导致滑石瓷表面产生微裂缝,从而加剧老化的过程。     

Electron spin resonance of stabilized free radicals in sedimentary organic matter

Electron spin resonance (ESR) is evaluated as a method to study the thermal degradation of sedimentary organic matter which consists mainly of kerogen. Whole rock and separated kerogen samples were pyrolysed stepwise (ambient to 700°C at 50°C increments), extracted and analysed for elemental composition and ESR spectra at each step. Whole rock samples give rise to complex spectra which include those of paramagnetic metals and are therefore unsuitable in most cases for this purpose.The ESR parameters g value, ΔH and N_g differ for different types of immature organic matter. An increase in N_g,shift of g value to 2.0026–2.0028 and reduction in h are the main trends during pyrolysis and in natural heating of sedimentary organic matter.The peak generations of liquid and gaseous hydrocarbons coincide with maxima of free radical density. ESR spectroscopy in combination with complementary geochemical characterization of the sedimentary organic matter can serve to indicate maturity with respect to peak oil-gas generation.     

河南小关低品位铝土矿矿物成分的扫描电镜研究

本文用扫描电子显微镜和能量色散谱仪对河南小关低品位铝土矿的主要矿物成分及其微观结构进行了观察分析,并与高品位铝土矿进行了比较,发现有如下特点:低品位铝土矿的矿物成分复杂,常见多种矿物共生;铝矿物主要为硬水铝石,晶体化程度较差,或晶形不完整,结构比高品位铝土矿致密;淋滤次生孔洞及结晶完好的次生软水铝石晶体较少。     

Analytical electron microscope studies of size-segregated particles collected during AGASP-II,flights 201–203

Cascade impactor samples were collected over the Alaskan Arctic during the first three research flights of AGASP-II. These samples were analyzed using analytical electron microscopy to determine the morphology, mineralogy and elemental composition of individual particles. For analytical considerations, a typical impactor sample was run for approximately 20 min, thus giving excellent time resolution of discrete events.Samples collected during flights 201 and 202 consisted of stratospheric aerosol and lower-altitude haze samples. Stratospheric samples were characterized by moderate loadings of H₂SO₄ droplets with relatively few particles of other types. Samples collected in tropospheric haze layers generally exhibited light-to-moderate particle loadings. H₂SO₄ was again the most prevalent species, with crustal and anthropogenic particles also observed. One sample taken over south-central Alaska near the end of flight 203 showed high concentrations of solid crustal particles, with relatively little associated H₂SO₄. Giant particles larger than 5 m were occasionally observed in this aerosol. The composition of this material closely matches that of bulk ash from the Mt. Augustine volcano, which erupted 9–13 days before collection of this sample. This brings forth the possibility that pockets of ash-rich aerosol existed over parts of south and central Alska during the AGASP-II field mission. There is no evidence that these volcanic aerosols were present in the AGASP study area north of the Brooks Range.