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新疆西准噶尔造山带北部晚石炭世I型花岗岩的岩石地球化学和锆石Hf- O同位素特征:对其岩石成因与构造过程的启示

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地质学报 2024年第4期98卷 1146-1163页

作者：张蕊尹继元邱亮陶再礼杨帆陈文自然资源部深地科学与探测技术实验室自然资源部同位素地质重点实验室中国地质科学院地质研究所北京100037 中国地质大学地球科学与资源学院北京100083

新疆西准噶尔造山带发育大量的晚古生代侵入岩,但它们的岩浆源区和形成的构造背景仍然存在较大争议。本文对西准噶尔造山带北部阿尔加提山石英二长岩进行了详细的岩石学、地球化学、锆石Hf-O同位素研究,旨在揭示其岩石成因和构造背景,... 详细信息

新疆西准噶尔造山带发育大量的晚古生代侵入岩,但它们的岩浆源区和形成的构造背景仍然存在较大争议。本文对西准噶尔造山带北部阿尔加提山石英二长岩进行了详细的岩石学、地球化学、锆石Hf-O同位素研究,旨在揭示其岩石成因和构造背景,探讨其与地壳生长的关系。两件样品的锆石U-Pb定年结果分别为301.8±1.4 Ma和303.7±3.1.Ma,形成于晚石炭世。阿尔加提山石英二长岩样品含有角闪石,高硅(SiO_(2)=67.8%~68.9%)、富碱(K_(2)O+Na_(2)O=9.36%~9.89%)、具有低的铝饱和指数(A/CNK=0.96~1.00),伴有低的Ga/Al值(2.27~2.34),Rb/Sr值(0.35~0.50),显示出I型花岗岩的特征。同时,这些样品均富集大离子亲石元素和轻稀土,亏损高场强元素(如Nb、Ta和Ti等),和负的Eu异常(δEu=0.72~0.85),类似于典型俯冲相关的岛弧岩浆特征。这些I型花岗岩具有高的、正的锆石ε_(Hf)(t)值(+1..2~+1..5)和年轻的二阶段Hf模式年龄(t_(DM2)=604~392 Ma),以及比地幔值略高的锆石δ^(1.)O值(5.73‰~6.51.)和高的锆石饱和封闭温度(T_(zr)=854~895℃),可能是新生下地壳在高温背景下部分熔融的产物。结合前人在西准噶尔造山带北部发现的晚石炭世早二叠世A1.A2型花岗岩和埃达克质岩墙,本文认为这些高温岩石组合的形成可能与晚石炭世的洋中脊俯冲及其相关板片窗作用有关。在洋脊俯冲背景下,软流圈地幔上涌加热新生下地壳,促使其发生部分熔融形成I和A_(1.和A_(2)型花岗岩。西准噶尔造山带大多数下地壳主要形成于早古生代,表明该地区在显生宙发生了显著的地壳增长。

关键词：西准噶尔造山带 I型花岗岩晚石炭世洋脊俯冲 Hf-O同位素

AN APPLICATION OF THE ROCK ENGINEERING SYSTEMS(RES) METHODOLOGY IN ROCKFALL HAZARD ASSESSMENT ON THE chenGDU-LHASA HIGHWAY,{1.

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AN APPLICATION OF THE ROCK ENGINEERING SYSTEMS(RES) METHODOL...

中国科学院地质与地球物理研究所2004学术年会

作者： L.Q.zhang~1.Z.F.{1.~2,Q.L.Liao and J.chen 1.2)institute of Geology and Geophysics,chinese academy of sciences,beijing,P.R.china

The purpose of this paper is to present an application of the Rock Engineering System(RES) methodology in hazard assessment of rockfalls which occurred along a 430km long section of the chengduLhasa *** the area under investigation,rockfall hazard analysis is complicated by extensive distribution of blocks and boulders,lack of data,complex {1. structure,difficult site conditions and the high number of interactive factors.A comprehensive approach is developed for evaluating rockfall hazards in the complex environments,allowing the utilization of all the knowledge about intensity, frequency and hazards *** this approach,1. parameters relevant to rockfall intensity and another 4 parameters to rockfall frequency are respectively assessed by two interaction *** matrix coding,classification and rating of those interactive parameters,the rockfall intensity index RII and rockfall frequency index RFI for 1. slopes are computed,and the rockfall hazard index RHI obtained by the product of RII and *** rockfall hazards of the 1. slopes are classified and ordered in terms of the magnitudes of RHI.

关键词： rockfalls rockfall hazards intensity frequency interaction matrix and hazard assessment

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东辛油田东南部油藏描述及滚动勘探目标选择

石油学报 2004年第2期25卷 36-40页

作者：张煜陈恭洋史文东张永贵中石化胜利油田公司山东东营257094 长江大学地球科学学院湖北荆州434023 中石化勘探开发研究院北京100083

通过高分辨率层序地层划分与对比、全三维地震资料构造解释与微构造分析、测井地震约束波阻抗反演、地震资料油气预测等配套新技术的综合应用 ,重新建立了东辛油田东南部地区的油藏地质模型。在对成藏规律认识的基础上 ,提出了工区构... 详细信息

通过高分辨率层序地层划分与对比、全三维地震资料构造解释与微构造分析、测井地震约束波阻抗反演、地震资料油气预测等配套新技术的综合应用 ,重新建立了东辛油田东南部地区的油藏地质模型。在对成藏规律认识的基础上 ,提出了工区构造油藏和岩性油藏两类共 7个滚动勘探目标。前者主要为沙三中以下目的层 ;后者为微构造或斜坡背景下的岩性尖灭型圈闭。

关键词：油藏描述滚动勘探目标选择东辛油田

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中国含硫化氢天然气的研究及勘探前景

天然气工业 2004年第9期24卷 1-4页

作者：朱光有戴金星张水昌李剑金强陈践发中国石油勘探开发研究院石油大学地球资源与信息学院石油大学资源与信息学院

我国目前已在四川盆地、渤海湾盆地、鄂尔多斯盆地、塔里木盆地和准噶尔盆地等发现了含硫化氢气藏 ,含硫化氢天然气和高含硫化氢天然气已成为我国天然气资源的重要组成部分。由于硫化氢极强的毒性和腐蚀性 ,威胁着钻采生产过程中的每一... 详细信息

我国目前已在四川盆地、渤海湾盆地、鄂尔多斯盆地、塔里木盆地和准噶尔盆地等发现了含硫化氢气藏 ,含硫化氢天然气和高含硫化氢天然气已成为我国天然气资源的重要组成部分。由于硫化氢极强的毒性和腐蚀性 ,威胁着钻采生产过程中的每一个环节 ,极易发生事故。而目前国内外对硫化氢的成因机理、分布规律和控制因素等方面的认识尚不能做到有效预测 ,安全钻采等工艺技术尚不配套成熟 ,在硫化氢出现时的防御措施也不到位 ,因此尽快开展硫化氢研究已是当务之急。研究了硫化氢天然气勘探开发中存在的问题 :地质认识不足 ,形成机理掌握不够 ,地化特性考虑不充分等。指出了中国含硫化氢天然气资源潜力在陆上已开发气区和海陆碳酸盐岩储层中都十分巨大。

关键词：硫化氢含硫勘探前景天然气资源气藏渤海湾盆地碳酸盐岩储层中国分等到位

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移动机器人视觉里程计综述

自动化学报 2018年第3期44卷 385-400页

作者：丁文东徐德刘希龙张大朋陈天中国科学院自动化研究所精密感知与控制研究中心北京100190 中国科学院大学北京101408 天津中科智能技术研究院有限公司天津300300

定位是移动机器人导航的重要组成部分.在定位问题中,视觉发挥了越来越重要的作用.本文首先给出了视觉定位的数学描述,然后按照数据关联方式的不同介绍了视觉里程计(Visual odometry,VO)所使用的较为代表性方法,讨论了提高视觉里程计鲁... 详细信息

定位是移动机器人导航的重要组成部分.在定位问题中,视觉发挥了越来越重要的作用.本文首先给出了视觉定位的数学描述,然后按照数据关联方式的不同介绍了视觉里程计(Visual odometry,VO)所使用的较为代表性方法,讨论了提高视觉里程计鲁棒性的方法.此外,本文讨论了语义分析在视觉定位中作用以及如何使用深度学习神经网络进行视觉定位的问题.最后,本文简述了视觉定位目前存在的问题和未来的发展方向.

关键词：视觉里程计视觉定位位姿估计导航移动机器人

Map-based cloning of spl5,a lesion-mimic gene in rice

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Map-based cloning of spl5,a lesion-mimic gene in rice

The Zoulang Nanshan Caledonian Subduct ion Complex in the Northern Qilian Mountains and Its Dynamics

中国遗传学会植物遗传和基因组学专业委员会2007年学术研讨会

作者： Bo Jun Ma~1.Xi Feng chen~1.{1. Jin~1.Yu chen zhang~1.Zhi Min Gu~1.wen Xue Zhai~2 1.College of Chemistry & Life Science,Zhejiang Normal University,Jinhua,321.04,china 2.institute of Genetics and Developmental Biology,Chinses academy of sciences,beijing,1.01.1.china

Plant mutants,which spontaneously produced lesions that resemble disease symptoms in the absence of pathogen attack and other damage or suppressed conditions,were called lesion ***,the research of these mutants became...

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Acta Geologica Sinica(English Edition) 1994年第3期68卷 225-241页

作者： Xu Zhiqin, Xu Huifen, zhang Jianxin, Li Haibing, Zhu Zhizhi, Qu Jingchuan,institute of Geology, chinese academy of geological sciences, beijingchen Daizhang, chen Jinlu, china University of Geosciences, beijingand yang KaichunNo. 2 Q ilian geological Party, Bureau of Geology and Mineral Resources of Q inghai Province, Q ilian County, Q inghai chinese {1. of geological sciences Beijing China

The front of the Zoulang Nanshan Caledonian volcanic island arc zone in the northern Qilian Mountains is a forearc accretionary terrane, composed of multiple accretionary volcanic island arcs, flysch accretionary wedges,high-pressure metamorphosed detachment zones and remnants of ophiolites. It resulted from the northeastward subduction of the Early Palaeozoic Qilan oceanic crust beneath the Alxa block. High-pressure metamorphism, which occurred during the subduction, progressed through three stages: the initial stage of medium T-high P,the main stage of temperature decrease and pressure increase, and the lag stage of pressure decrease and temperature increase. Finally the paper presents a retrotrench subduction dynamic model indicative of northward subduction of the central Qilian block and southward accretion of the Alxa block during the period of 450-500 Ma.

关键词： subduction complex accretionary terrane multiple structure retrotrench subduction dynamics

深度开发油田确定性与随机建模结合的相控建模

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石油学报 2004年第5期25卷 60-64页

作者：吕晓光张永庆陈兵陈舒薇潘懋大庆油田有限责任公司勘探开发研究院黑龙江大庆163712 北京大学地质系北京100871

总结了储层建模研究的几个基本观点 ,提出了采用确定性微相建模与随机参数模拟相结合以提高整体建模精度的思路。在微相确定性建模的基础上 ,采用相控蒙特卡洛模拟预测储层参数分布 ,生成了参数分布。对低弯度分流河道砂体建模实例的研... 详细信息

总结了储层建模研究的几个基本观点 ,提出了采用确定性微相建模与随机参数模拟相结合以提高整体建模精度的思路。在微相确定性建模的基础上 ,采用相控蒙特卡洛模拟预测储层参数分布 ,生成了参数分布。对低弯度分流河道砂体建模实例的研究结果表明 ,相控条件下的参数随机模拟精细刻画了储层的非均质性。对于资料信息点足够大的处于成熟开发的油田 ,采用研究区实际统计分布函数得到的随机模拟结果更接近于地下实际的非均质构型。

关键词：油田开发储层建模地喷约束相控模型随机参数蒙特卡洛模拟非均质性储层

Improvement of cloud microphysical parameterization and its advantages in simulating precipitation along the Sichuan-Xizang Railway

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Science china Earth {1. 2024年第3期67卷 856-873页

作者： Xiaoqi XU Zhiwei HENG Yueqing LI Shunjiu WANG Jian LI Yuan WANG Jinghua chen Pei{1. zhang Chunsong LU china Meteorological Administration Transportation Meteorology Key Laboratory Nanjing Joint Institute for Atmospheric SciencesNanjing 210041China Heavy Rain and Drought-Flood Disasters in Plateau and Basin Key Laboratory of Sichuan Province Institute of Plateau MeteorologyCMAChengdu 610072China State Key Laboratory of Disaster Weather Chinese Academy of Meteorological SciencesBeijing 100081China Collaborative Innovation Center for Western Ecological Safety Lanzhou UniversityLanzhou 730000China china Meteorological Administration Aerosol-Cloud and Precipitation Key Laboratory and Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD) Nanjing University of Information Science and TechnologyNanjing 210044China

The Sichuan-Xizang Railway is an important part of the railway network in china, and {1. disasters, such as mountain floods and landslides, frequently occur in this region. Precipitation is an important cause of these disasters;therefore,accurate simulation of the precipitation in this region is highly important. In this study, the descriptions for uncertain processes in the cloud microphysics scheme are improved;these processes include cloud droplet activation, cloud-rain autoconversion, rain accretion by cloud droplets, and the entrainment-mixing process. In the default scheme, the cloud water content of different sizes corresponds to the same cloud droplet concentration, which is inconsistent with the actual content;this results in excessive cloud droplet size, unreasonable related conversion rates of microphysical process(such as cloud-rain autoconversion), and an overestimation of precipitation. Our new scheme overcomes the problem of excessive cloud droplet size. The processes of cloudrain autoconversion and rain accretion by cloud droplets are similar to the stochastic collection equation, and the mixing mechanism of cloud droplets is more consistent with that occurred during the actual physical process in the cloud. Based on the new and old schemes, multiple precipitation processes in the flood season of 2021.along the Sichuan-Xizang Railway are simulated, and the results are evaluated using ground observations and satellite data. Compared to the default scheme, the new scheme is more suitable for the simulation of cloud physics, reducing the simulation deviation of the liquid water path and droplet radius from 2 times to less than 1.time and significantly alleviating the overestimation of precipitation intensity and range of precipitation center. The average root-mean-square error is reduced by 22%. Our results can provide a scientific reference for improving precipitation forecasting and disaster prevention in this region.

关键词： The Sichuan-Xizang Railway Cloud microphysics Precipitation Model improvement