峨眉宝光研究之二——对宝光伴生大光环的研究

根据四个宝光实例的分析，指出峨眉宝光的伴生大光环并不都是主虹。由冰晶去雾产生的宝光，其伴生的大光环实为对日（月）晕，从而肯定了近年来盛行的范氏（Van de Hulst)宝光形成的后向散射机理，不能用以解释一切宝光现象，否定了冰晶云雾不能产生宝光的局限认识。还指出了《国际气象词典》中“布格晕”条释义的错误。     

用转换波检测煤层裂隙的方法探讨

根据理论模型计算结果对比分析找出的煤层纵波场和转换波场和转换波场与煤层裂隙状态变化间的相关关系，探讨了综合使用纵波和转换波检测煤层裂隙的可行方法，对有效开展转换法地震勘探工作具有指导意义。     

西昌—滇中地区大、中型内生矿床分布规律及预测

用王亚光研究大型矿床空间分布规律理论来研究西昌—滇中地区大、中型内生矿床的分布规律及预测,用“矿结”一词来表明经纬线方向深大断裂交汇处是大矿的分布空间。1990年所预测的一些成矿区为1991年地质找矿工作所证实,如大红山式铁铜矿的新发现和会东发嵩铝锌矿的新进展。     

Deep crustal growth of quartz, kyanite and garnet into large-aperture, fluid-filled fractures, north-eastern Connecticut, USA

Abstract A petrographic and petrological analysis of exceptionally well-preserved hydrothermal veins from the Merrimack synclinorium, north-eastern Connecticut, has been carried out in order to place new field-based constraints on fracture aperture dimensions and porosity in the lower continental crust. The veins preserve substantial open space today in outcrop, and contain mineral assemblages including subhedral to euhedral crystals of quartz, kyanite and almandine-rich garnet. Textural evidence indicates unequivocally that the vein minerals grew into macroscopic (mm- to cm-scale) open space between the vein walls. The veins are interpreted to have been large-aperture fractures along which significant advective fluid infiltration and chemical reaction occurred. The porosity of the rock mass due to open space between fracture walls today is c . 0.3%, but it could have been as large as several percent when the flow system was active. Quantitative thermobarometry results from vein mineral assemblages indicate that the fractures formed at pressures and corresponding crustal depths of c. 0.8 GPa and c. 30km, and temperatures of 550–600° C. The depth of fracture formation corresponds to published estimates of the maximum burial depth of the Merrimack synclinorium during the Acadian orogeny. The formation of large-aperture fractures could increase significantly the transient permeability of the deep crust, and therefore influence metamorphic heat and mass transfer.     

新疆库松木切克山喇嘛萨依式铜矿的勘查标志

本文通过对库松木切克山喇嘛萨依铜矿地质特征及控矿因素的研究,总结出该类矿床的若干勘查标志,其中地层层位、含矿岩相、地球化学异常、容矿岩石、围岩蚀变、活化脉体及同生断裂等最为明显。在区域内如能确定出这些标志,尤其是标志组合的存在,则将可能取得该类矿床找矿的新突破。     

NGC 4650 A: A nearly edge-on ring galaxy?

The peculiar galaxy NGC 4650 A (α=12^h 42^m. 1; = δ—40° 26′; 1950·0) has been studied by means of direct and spectral observations with the ESO 3·6-m telescope. It is interpreted as a prolate, elliptical galaxy surrounded by a warped ring of H II regions, dust and stars. The distance is 47 Mpc (H ₀=55 km s⁻¹ Mpc⁻¹). The ring is seen nearly edge-on (inclination 85°) and it rotates. It has a diameter of about 21 kpc and is bluer than the elliptical galaxy for which the (M/L _v) ratio is ∼12 in solar units. The observed configuration may be the result of interaction with the nearby galaxy, NGC 4650.     

Contributions to the Ring Current Energy During Geomagnetic Storms

The purpose of this research was to study the complexity of the energization of the ring current during a geomagnetic storm, produced during southern Bz(IMF) by the injection of plasma sheet ions, accelerated by enhanced convective electric fields. This model assumes that the plasma sheet is continuously populated by H⁺ from the sun and the ionosphere, and sporadically by ionospheric O⁺, making the ring current a coupled system whose energy can hardly be expressed analytically. When Bz(IMF) turns north, the ring current becomes uncoupled, and the energy decays exponentially if the storm is weak, or can be expressed as a combination of exponentials during strong storms representing the quick decay of O⁺ and the slower decay of H⁺, as has been shown.     

山西义兴寨金矿床金矿物颗粒的产出及其成矿动力学意义

山西义兴寨金矿床的金主要呈包体金和裂隙金两种产出状态.文章根据成矿地球化学动力学理论,论证了金元素在含矿断裂发生脆性破裂和脆-韧性扩张活动中析出的化学反应类型,以及受反应动力学条件的制约,形成矿石中金不同产出状态的规律.指出热液矿床中普遍存在的包体金为热液成矿早期阶段断裂发生脆性破裂和成矿流体沸腾,导致快速反应结晶的产物;而裂隙金和晶隙金为成矿晚期金等矿质在流体中残余富集,同时成矿断裂再次发生脉动破裂,即成矿热力学演化与有利的构造动力学因素耦合作用的结果.得出金矿物颗粒的产出状态具有成矿动力学意义的结论.     

一种改进的Delaunay三角化算法研究

Delaunay三角化在诸多应用领域具有极其广泛用途,也一直是计算机图形图像学和科学计算可视化技术的重要研究内容。针对二维约束Delaunay三角化问题,提出一种快速生成算法。该算法首先建立环形矩形,分环分治平面散乱点;然后依据Delaunay三角形的性质,从外环到内环分治逐步插入新点,一环插入完毕后,整理有效Delaunay三角形;依次循环快速生成二维约束Delaunay三角网格。本算法计算过程简单,计算效率高,程序编写十分容易无需复杂的递归过程,技巧性地解决了二维约束Delaunay三角化问题。实例证明,该算法具有较好的应用效果。