The Linglong granitoid complex (LGC) is composed of four major plutonic units that intruded and cooled in the Middle Jurassic (170-155 Ma). Gravity-anomaly modeling indicates that the LGC is a sheet-like laccolith, le...The Linglong granitoid complex (LGC) is composed of four major plutonic units that intruded and cooled in the Middle Jurassic (170-155 Ma). Gravity-anomaly modeling indicates that the LGC is a sheet-like laccolith, less than 10 km thick, that dips shallowly below the surface toward the Tancheng-Lujiang (Tan-Lu) fault, a major lithospheric structure in Eastern China. Measurements of foliation in the field and measurements of planar and linear magnetic fabrics from the study of anisotropy of magnetic susceptibility in the LGC indicate that foliation is dominantly shallowly dipping and magnetic lineation is mainly parallel to the dip direction of the laccolith toward the Tan-Lu fault zone. The trend of lineations is consistent with flow of magma up the thrust to reach shallower levels. The magma of the LGC probably originated by crustal melting within the Tan-Lu fault zone and the emplacement of magma occurred along a shallowly-dipping thrust that drained the Tan-Lu fault zone, the mechanism of which is mainly dike-fed model.展开更多
美国零长弹簧公司(Zero-Length Spring Corporation)生产的贝尔雷斯(Burris)金属零长弹簧自动重力仪,是拉科斯特-隆贝格(LaCoste&Romberg)陆地重力仪的升级产品和重大改进。该仪器具有以下三大特色:先进的U ltra-G ravTM控制系统、...美国零长弹簧公司(Zero-Length Spring Corporation)生产的贝尔雷斯(Burris)金属零长弹簧自动重力仪,是拉科斯特-隆贝格(LaCoste&Romberg)陆地重力仪的升级产品和重大改进。该仪器具有以下三大特色:先进的U ltra-G ravTM控制系统、世界的测量范围、完全综合的整体设计。介绍了零长弹簧思想的提出及拉科斯特-隆贝格重力仪的生产过程。展开更多
基金the National Natural Science Foundation of China (Grant No. 49772149), NFS of the United States (NFS/INT-9507687) and Doctoral Foundation of Ministry of Education of China (1996-1998).
文摘The Linglong granitoid complex (LGC) is composed of four major plutonic units that intruded and cooled in the Middle Jurassic (170-155 Ma). Gravity-anomaly modeling indicates that the LGC is a sheet-like laccolith, less than 10 km thick, that dips shallowly below the surface toward the Tancheng-Lujiang (Tan-Lu) fault, a major lithospheric structure in Eastern China. Measurements of foliation in the field and measurements of planar and linear magnetic fabrics from the study of anisotropy of magnetic susceptibility in the LGC indicate that foliation is dominantly shallowly dipping and magnetic lineation is mainly parallel to the dip direction of the laccolith toward the Tan-Lu fault zone. The trend of lineations is consistent with flow of magma up the thrust to reach shallower levels. The magma of the LGC probably originated by crustal melting within the Tan-Lu fault zone and the emplacement of magma occurred along a shallowly-dipping thrust that drained the Tan-Lu fault zone, the mechanism of which is mainly dike-fed model.
文摘文中指出权威英文词典在物理场定义上的误导并加以澄清。《朗文现代高级词典》(Longman ModernEnglish Dictionary),《朗文当代高级词典》(Longman Dictionary of Contemporary English),《牛津高阶英汉双解词典》(Oxford Advanced Learner s English-Chinese Dictionary),《韦氏词典》(Merriam-Webster s NewCollegiate Dictionary),作为美国勘探地球物理学会(SEG)名词术语,特别是地球物理名词术语标准的《勘探地球物理百科词典》(Encyclopedic Dictionary of Exploration Geophysics)和《应用地球物理百科词典》(TheEncyclopedic Dictionary of Applied Geophysics),以及中国的一些地球物理教科书、专著及词典,把物理场定义为物理作用或效应存在的空间或区域,不同于物理学中场论及国外地球物理文献的定义:空间中存在的作用或效应。定义物理场为物理作用或效应存在的空间,混淆了物理"场"本身及"场域"的概念,不是一个标准的物理学定义。建议物理场定义为:空间中存在的物理作用。
文摘美国零长弹簧公司(Zero-Length Spring Corporation)生产的贝尔雷斯(Burris)金属零长弹簧自动重力仪,是拉科斯特-隆贝格(LaCoste&Romberg)陆地重力仪的升级产品和重大改进。该仪器具有以下三大特色:先进的U ltra-G ravTM控制系统、世界的测量范围、完全综合的整体设计。介绍了零长弹簧思想的提出及拉科斯特-隆贝格重力仪的生产过程。
