数字城市地理空间框架城乡规划管理信息系统的设计与应用研究

本文研究在数字城市地理空间框架相关成果的基础上,通过共享地理信息公共平台基础地理数据,提出城乡规划一张图数据库组织结构及建设标准,在共享联合的基础上实现规划项目管理信息化、规划业务审批电子化、规划决策管理一体化的建设思路与方法,并以数字黄冈地理空间框架城乡规划管理信息系统建设为示范进行系统实践应用,替代有纯文本的办公环境,以一体化的数据管理方式为规划审批与决策提供信息化手段与支持。     

河北省变质核杂岩

河北省变质核杂岩形成于中一新生代,围绕华北拗陷盆地呈环带状分布在太行山,燕山地区。分为穹状和长垣状两种。同美国科迪勒拉式变质核杂岩相比,在主拆离断层内缺失巨厚的韧性剪切带。其形成的动力机制包括岩浆底辟、区域大陆伸展和地幔（亚）柱上隆作用。     

数字省区地理空间框架的理解认识与建设

首先综述了数字省区地理空间框架的概念,剖析了其构成,即基础地理信息数据体系、目录与交换体系、公共服务体系、政策法规与标准体系和组织运行体系等五部分,在此基础上提炼并归结为基础地理信息数据库和地理信息公共平台两项任务,接下来阐述了它们的建设内容及流程。     

可拓理论在矿区土地破坏程度评价中的应用

将矿区破坏土地、评价指标、指标现状结合为一体,利用可拓集理论,通过关联函数,给出了各评价指标影响矿区土地破坏程度的量化描述,进而确定了所选矿区土地的破坏程度,并结合Arcmap软件精确确定了不同破坏程度土地的面积;采用了集值统计的方法确定了物元特征权重,从而提高了评价的精确性;科学地确定了评价单元划分要求,使得评价结果更能指导实际工作,评价结果能够为矿区破坏土地的合理利用提供有利的依据,同时也证明了可拓理论在矿区土地破坏程度评价中的应用是可行的。     

Geodynamically indicated targeting strategy for shale‐hosted massive sulfide Pb–Zn–Ag mineralisation in the Western Fold Belt,Mt Isa terrane

There is ongoing debate with respect to the genetic models for shale‐hosted massive sulfide Pb–Zn–Ag deposits contained in the Palaeoproterozoic to Mesoproterozoic intracontinental Isa Superbasin in the Western Fold Belt, Mt Isa terrane. Favourable sites of mineralisation can be predicted based on understanding the tectonic setting of the Isa Superbasin, the structural controls of mineralisation and the chemically favourable environments for ore deposition. Shale‐hosted massive sulfide Pb–Zn–Ag deposits are hosted in successions deposited during the dominant sag‐phase of the Isa Superbasin. These deposits are localised at the intersections of major basin‐scale extensional faults and are hosted in both shallow‐marine and deeper water carbonaceous shales that are characteristically anoxic and located near or at maximum flooding surfaces. All major shale‐hosted massive sulfide Pb–Zn–Ag deposits are located to the west of the Mt Isa Rift (ca 1710–1670 Ma). This spatial association is explained by an asymmetrical lithosphere extension model for the evolution of the Isa Superbasin. Elevated geothermal gradients at the location of maximum subcrustal lithospheric thinning to the west of the Mt Isa Rift may have driven the migration of basinal brines. Increased subsidence at this location produced favourable anoxic sedimentary horizons for metal precipitation during orebody formation.     

Ordovician system

Rocks in the Brungle‐Darbalara area of the Tumut Trough form two distinct domains: basement (mainly Bullawyarra Schist), of Cambrian‐Ordovician age, and an Ordovician ‐ Early Silurian sedimentary and volcanic cover sequence. These two domains are separated by a sharp discontinuity that marks an abrupt change in rock type, structure, metamorphic grade and deformation style. Cover sequences have undergone only one major penetrative deformation during the Late Silurian, involving sub‐greenschist facies metamorphism and upright folding. In contrast, the basement also underwent at least two older deformations at greenschist facies and contains distinct high‐strain zones subconcordant with the basement‐cover contact. The high‐strain zones, characterized by a ubiquitous south‐southeast trending mineral lineation, record a discontinuous history of ductile followed by brittle behaviour, consistent with an extensional origin.

The structural and metamorphic discontinuity separating basement from Silurian cover is characterized by widespread cataclasis and alteration and is interpreted as a major detachment fault associated with lithospheric extension and the development of the Tumut Trough in the Early Silurian. During the main period of movement on the detachment, which took place prior to intrusion of the Blacks Flat Diorite into the Bullawyarra Schist, mafic and serpentinized ultramafic rocks either were tectonically emplaced or intruded into the high strain zones. This preceded and accompanied extensional faulting of the cover and deposition of Silurian trough sediments and volcanics which unconformably overlie and onlap older units.

The development of the Tumut Trough, in the Brungle‐Darbalara area, bears many similarities with that of Cordilleran metamorphic core complexes. Such a model is consistent with environments suggested for the trough by previous workers. The south‐southeast extension direction parallels the trough‐bounding faults and implies an overall strike‐slip tectonic setting.     

Extension of TOPMODEL Applications to the Heterogeneous Land Surface

At present,the Topographic Index Model(TOPMODEL) has been recommended for integration in Land Surface Models(LSMs).But,the applicable scope of the original TOPMODEL(OTOP) is limited because the OTOP derivation relies on three fundamental but unrealistic assumptions.In this paper,several versions of a generalized TOPMODEL(GTOP),which relax some unrealistic assumptions involved in OTOP,are presented,and the theoretical derivationsn to obtain these modifications are demonstrated in detail.Specifically,the exte...     

初论变异性不整合--以滇西北中甸地区为例

通过对滇西北中甸地区１：５万地质填图,并结合地质构造综合研究,首次提出了下三叠统布伦组与下伏上古生界为变异性不整合的新看法,它是在大陆引张环境下形成的一种层接触关系,主要识别标志是：区域性强烈起伏的不整合面;下伏基盘伸 引张环境玄武岩的发育;上覆沉积厚度显著变化、相变急剧;不整合表现形式多样,以及“基质”＋“岩块”的图面效应,它的识别对地质填图、地质构造演化以及构造运动的时空论形式等方面的研究具有     

Cretaceous–Tertiary structures and kinematics of the Serbomacedonian metamorphic rocks and their relation to the exhumation of the Hellenic hinterland (Macedonia, Greece)

 The kinematic pattern and associated metamorphism of the predominant ductile deformation and the subsequent deformational stages of the Serbomacedonian metamorphic rocks and granitoids are presented in terms of peri-Tethyan tectonics. A systematic record of structural and metamorphic data gives evidence of a main top-to-ENE to ESE ductile flow of Cretaceous age (120–90 Ma) associated with a crustal stretching and unroofing. A subordinate WSW to WNW antithetic sense of movement of the tectonic top is observed in places. The associated metamorphic conditions are estimated at 4.5–7.5 kbar and 510–580  °C. During Eocene to Miocene times these fabrics were successively deformed by low-angle extensional D_e ductile shear zones with top-to-NE and SW sense of movement and brittle shear zones of similar kinematic pattern, suggesting a transition from ductile to brittle deformation. D_e deformation was accompanied during its later stages by NW/SE-directed shortening. We also discuss the relation of this Cretaceous–Tertiary deformation of the Serbomacedonian metamorphic rocks with the Eocene to Miocene ductile, top-to-southwestward crustal shear of the adjacent Rhodope crystalline rocks. We regard the Serbomacedonian and the Rhodope metamorphic rocks to represent related metamorphic provinces, the most recent exhumation and cooling history of which is bracketed between the Eocene and Neogene. Received: 8 December 1998 / Accepted: 19 April 1999     

可拓工程方法在自然地理界线划分中的应用

应用可拓工程方法和主成分分析方法,对福建省境内南亚热带北界最佳位置的确定建立了识别对象的物元模型,模型输出的结果获得满意的自然地理意义解释。