To explore the genesis of the laminated calcite veins developed in the black shale of Chang 73 submember of the Ordos Basin,the petrology,microstructure and geochemistry of calcite veins are studied using thin section...To explore the genesis of the laminated calcite veins developed in the black shale of Chang 73 submember of the Ordos Basin,the petrology,microstructure and geochemistry of calcite veins are studied using thin sections,fluid inclusions,trace elements and isotopic geochemistry.The source,the time of formation,the mechanism of formation,and the dynamic background of the veins are discussed.The veins are mostly made up of calcite,mixed with lenticular or spindle-shape solid wall rock inclusions.Three structures are identified in the calcite minerals:fibrous,rhombic cleavage,and wedge-like structure.Trace elements and isotopes of carbon and oxygen confirm that the calcite veins were formed from a high density hydrothermal fluid.It is assumed that calcite veins formed prior to wall rock consolidation during the formation of the Qinling Orogenic Belt in the Middle and Late Triassic.The results show that the sedimentary sources of Chang 73 submember were influenced by hydrothermal materials besides terrigenous detritus.The fibrous calcite is different from the fibrous calcite reported in the morphology and mechanism of formation.In this way,the research complements and improves the morphology and the mechanism of formation of fibrous calcite.展开更多
随着大靶面拼接探测器技术的发展,保障数据处理终端能够高速、无误地接收大规模、高分辨率图像数据至关重要。终端数据接收系统由具备两路光纤接口,八路串口,一路PCIe接口的硬件设备及其配套国产系统设备驱动组成。其中,硬件设备以FPGA...随着大靶面拼接探测器技术的发展,保障数据处理终端能够高速、无误地接收大规模、高分辨率图像数据至关重要。终端数据接收系统由具备两路光纤接口,八路串口,一路PCIe接口的硬件设备及其配套国产系统设备驱动组成。其中,硬件设备以FPGA芯片作为核心处理单元。本文详细阐述了终端数据接收系统的硬件结构设计及若干关键技术,包括光纤数据的接收,数据校验与缓存方案设计,设备驱动程序控制串口收发数据的方案设计,采用分散/聚集映射直接内存访问技术(Scatter-Gather Direct Memory Access,SG-DMA)优化硬件设备与计算机之间大容量数据通信的能力和国产系统设备驱动的方案设计。实验结果表明,设备的数据接收速率可以达到2.26 GB/s,连续长时间运行未发生任何错误,驱动响应时间最短为111μs。该终端数据接收系统在稳定性、传输速率和传输延迟等方面均表现优异,展现了出色的性能和广泛的应用潜力。展开更多
文摘To explore the genesis of the laminated calcite veins developed in the black shale of Chang 73 submember of the Ordos Basin,the petrology,microstructure and geochemistry of calcite veins are studied using thin sections,fluid inclusions,trace elements and isotopic geochemistry.The source,the time of formation,the mechanism of formation,and the dynamic background of the veins are discussed.The veins are mostly made up of calcite,mixed with lenticular or spindle-shape solid wall rock inclusions.Three structures are identified in the calcite minerals:fibrous,rhombic cleavage,and wedge-like structure.Trace elements and isotopes of carbon and oxygen confirm that the calcite veins were formed from a high density hydrothermal fluid.It is assumed that calcite veins formed prior to wall rock consolidation during the formation of the Qinling Orogenic Belt in the Middle and Late Triassic.The results show that the sedimentary sources of Chang 73 submember were influenced by hydrothermal materials besides terrigenous detritus.The fibrous calcite is different from the fibrous calcite reported in the morphology and mechanism of formation.In this way,the research complements and improves the morphology and the mechanism of formation of fibrous calcite.
文摘随着大靶面拼接探测器技术的发展,保障数据处理终端能够高速、无误地接收大规模、高分辨率图像数据至关重要。终端数据接收系统由具备两路光纤接口,八路串口,一路PCIe接口的硬件设备及其配套国产系统设备驱动组成。其中,硬件设备以FPGA芯片作为核心处理单元。本文详细阐述了终端数据接收系统的硬件结构设计及若干关键技术,包括光纤数据的接收,数据校验与缓存方案设计,设备驱动程序控制串口收发数据的方案设计,采用分散/聚集映射直接内存访问技术(Scatter-Gather Direct Memory Access,SG-DMA)优化硬件设备与计算机之间大容量数据通信的能力和国产系统设备驱动的方案设计。实验结果表明,设备的数据接收速率可以达到2.26 GB/s,连续长时间运行未发生任何错误,驱动响应时间最短为111μs。该终端数据接收系统在稳定性、传输速率和传输延迟等方面均表现优异,展现了出色的性能和广泛的应用潜力。
