BP神经网络在天然气水合物化探中的应用     

马金凤  梁建  郭军  等 《江苏地质》2016,40(1):113-117

地球化学方法在天然气水合物勘探评价过程中的参数存在不确定性,且误差传递易导致结果不可信。运用BP神经网络技术,在天然气水合物勘探区域选取相关的应用切入点,通过训练建立神经网络模型,利用其非线性映射技术,揭示天然气水合物勘探评价中涉及的多个属性之间的非线性关系。计算结果显示,神经网络的分类方案有效弥补了当前地球化学评价方法存在的多解性等缺点,运用在地球化学数据的基础上建立的BP神经网络模型,对研究区块进行仿真预测,可以实现水合物矿藏的分等级评价。  相似文献   

《岩矿测试》征稿简则     

《岩矿测试》2014,(3)

正《岩矿测试》是中国地质学会岩矿测试技术专业委员会和国家地质实验测试中心共同主办的地质分析测试科学综合性学术期刊,是中文核心期刊(地学类),中国科技核心期刊,"中国期刊方阵"双效期刊。已被国内外19家数据库和文摘收录。本刊以发表优秀的地质与地球化学分析研究成果为核心目标,报道国内外地质科学、环境保护、  相似文献   

The Petrology, Geochemistry, and Petrogenesis of E-MORB-type Mafic Rocks from the Guomangco Ophiolitic Mélange, Tibet     

XU Mengjing  LI Cai  WU Yanwang  XIE Chaoming 《《地质学报》英文版》2014,88(5):1437-1453

The Guomangco ophiolitic melange is situated in the middle part of the Shiquanhe- Yongzhu-Jiali ophiolitic melange belt （SYJMB） and possesses all the subunits of a typical Penrose- type ophiolite pseudostratigraphy. The study of the Guomangco ophiolitic melange is very important for investigating the tectonic evolution of the SYJMB. The mafic rocks of this ophiolitic melange mainly include diabases, sillite dikes, and basalts. Geochemical analysis shows that these dikes mostly have E-MORB major and trace element signatures; this is the first time that this has been observed in the SYJMB. The basalts have N-MORB and IAB affinities, and the mineral chemistry of harzburgites shows a composition similar to that of SSZ peridotites, indicating that the Guomangco ophiolitic melange probably originated in a back-arc basin. The Guomangco back-arc basin opened in the Middle Jurassic, which was caused by southward subduction of the Neo-Tethys Ocean in central Tibet. The main spreading of this back-arc basin occurred during the Late Jurassic, and the basalts were formed during this time. With the development of the back-arc basin, the subducted slab gradually retreated, and new mantle convection occurred in the mantle wedge. The recycling may have caused the metasomatized mantle to undergo a high degree of partial melting and to generate E- MORBs in the Early Cretaceous. E-MORB-type dikes probably crystallized from melts produced by about 20%-30% partial melting of a spinel mantle source, which was metasomatized by melts from low-degree partial melting of the subducted slab.  相似文献   

廊坊地源矿物测试分选公司实验室简介     

张江满 《西北地质》2010,(4):274-274

<正>廊坊地源矿物测试分选公司实验室专业技术力量雄厚,下设选矿中心、重砂鉴定、岩矿鉴定、化学分析、岩矿制片及碎样五个专业项目组。测试鉴定设备齐全,并拥有较先进的无污染样品加工和全套选矿设备,可承担单矿物分选、无污染碎样、重砂鉴定、岩矿鉴定、岩矿制片、化学分析等工作。多年来为地质矿产研究工作提供了大量准确、可靠、公证的检测数据及鉴定报告,为我国地质事业的发展做出了较大贡献。  相似文献