SZW-1A型数字式温度计（V2004）通讯故障诊断及排除     

龚永俭  陈嵩  胡雪琪  马丽丽 《内陆地震》2013,(4):370-375

基于SZW．1A型数字式温度计（V2004）的维护管理经验和仪器组成,对SZW．1A型数字式温度计（V2004）的通讯故障原因进行了研究。结果表明,导致SZW-1A型数字式温度计（V2004）通讯故障的主要原因有网络链路故障、网络通讯接口故障和仪器主机故障3大类。针对SZW-1A型数字式温度计（V2004）常见非网络链路通讯故障的判定提出了一套诊断流程,并提出了该型号数字式温度计常见通讯故障的排除方法。这些故障的排除方法,对和SZW-1A型数字式温度计（V2004）有类似硬件组成的SWY-1A型水位仪、SWY-Ⅱ型水位仪、SWDW-1型水位地温综合观测仪等“十五”流体观测仪器的维护,有一定参考意义。  相似文献   

U–Pb ages and trace elements in metamorphic zircon and titanite from UHP eclogite in the Dabie orogen: constraints on P–T–t path     

X.‐Y. GAO  Y.‐F. ZHENG  Y.‐X. CHEN 《Journal of Metamorphic Geology》2011,29(7):721-740

Laser ablation inductively coupled plasma mass spectrometry analyses of U–Pb isotopes and trace elements in zircon and titanite were carried out on epoxy mounts and thin sections for ultrahigh‐pressure (UHP) eclogite in association with paragneiss in the Dabie orogen. The results provide a direct link between metamorphic ages and temperatures during continental subduction‐zone metamorphism. Zircon U–Pb dating gives two groups of concordant ages at 242 ± 2 to 239 ± 5 Ma and 226 ± 2 to 224 ± 6 Ma, respectively. The Triassic zircon U–Pb ages are characterized by flat heavy rare earth element (HREE) patterns typical of metamorphic growth. Ti‐in‐zircon thermometry for the two generations of metamorphic zircon yields temperatures of 697 ± 27 to 721 ± 8 °C and 742 ± 19 to 778 ± 34 °C, respectively. We interpret that the first episode of zircon growth took place during subduction prior to the onset of UHP metamorphism, whereas the second episode in the stage of exhumation from UHP to HP eclogite facies regime. Thus, the continental subduction‐zone metamorphism of sedimentary protolith is temporally associated with two episodes of fluid activity, respectively, predating and postdating the UHP metamorphic phase. The significantly high Ti‐in‐zircon temperatures for the younger zircon at lower pressures indicate the initial ‘hot’ exhumation after the peak UHP metamorphism. There are two types of titanite. One exhibits light rare earth element (LREE) enrichment, steep MREE–HREE patterns and no Eu anomalies, and yields Zr‐in‐titanite temperatures of 551 to 605 °C at 0.5 GPa, and the other shows LREE depletion and flat MREE–HREE patterns, and gives Zr‐in‐titanite temperatures of 782–788 °C at 2.0 GPa. The former is amenable for U–Pb dating, yielding a discordia lower intercept age of 252 ± 3 Ma. Thus, the first type of titanite is interpreted to have grown in the absence of garnet and plagioclase and thus in the early stage of subduction. In contrast, the second one occurs as rims surrounding rutile cores and thus grew in the presence of garnet during the ‘hot’ exhumation. Therefore, there is multistage growth of zircon and titanite during the continental subduction‐zone metamorphism. The combined studies of chronometry and thermobarometry provide tight constraints on the P–T–t path of eclogites during the continental collision. It appears that the mid‐T/UHP eclogite facies zone would not only form by subduction of the continental crust in a P–T path slightly below the wet granite solidus, but also experience decompression heating during the initial exhumation.  相似文献   

变质岩中金红石研究进展及存在问题   总被引：4，自引：0，他引：4       下载免费PDF全文

张贵宾  张立飞 《地学前缘》2011,18(2):26-32

随着原位微区分析技术的发展,金红石作为常见的副矿物,受到越来越多的关注.结合目前地学研究的热点科学问题,文中总结了金红石在变质岩石学中研究进展及存在的问题:(1)金红石在变质岩中的产状及形成过程;(2)金红石Zr含量温度计的进展及在低级、中级及高级变质岩中的应用;(3)金红石微量元素在弧岩浆过程和俯冲带变质作用的行为;...  相似文献   

三亚湾海水中Sr/Ca、Mg/Ca 变化及对珊瑚微量元素温度计的响应     

吴伟中  韦刚健  谢露华  刘颖 《海洋科学》2014,38(3):46-55

对海南岛南岸三亚湾海水2008~2009年周间隔取样,用全谱直读等离子体原子发射光谱(ICP-AES)分析方法对其Sr、Mg、Ca的含量m(Sr)、m(Mg)、m(Ca)进行了测定。结果显示,m(Sr)/m(Ca)=8.558×10-3~9.227×10-3、m(Mg)/m(Ca)=4.924~5.403,与全球各大洋和主要珊瑚礁区有明显的高异常偏差,而且在春末夏初和秋末冬初两个过渡期,三亚湾海水m(Sr)/m(Ca)波动幅度比m(Mg)/m(Ca)相对较大,且体现了一定的差异性。在此基础上,结合海水的m(Sr)/m(Ca)、m(Mg)/m(Ca)在时间和地域空间上的变化对珊瑚温度计标定的影响,对不同站点建立的珊瑚m(Sr)/m(Ca)温度计进行了重新校正,并与分配系数法对比分析,我们认为利用珊瑚的m(Sr)/m(Ca)、m(Mg)/m(Ca)重建古海水表面温度(SST)记录时必须综合考虑包括海水微量元素比值变化在内的各种影响因素对温度计标定的干扰,为进一步了解气候环境演变具有重要意义。  相似文献   

TCM-3型硐体测温仪的设计及误差分析     

杨江  吕宠吾 《大地测量与地球动力学》2007,27(Z1):111-115

TCM-3型测温仪采用Pt100铂电阻作为温度传感元件,结合铂电阻稳定性和重复性好、线性度高的特点及实际应用环境的限制,通过后续电路的设计使TCM-3型测温仪达到了要求的测量精度,并从理论上进行误差分析,检验了其测量精度的可靠性.  相似文献   

俄罗斯白海地区太古代榴辉岩的金红石Zr温度计应用及其地质意义     

李小犁  张立飞  魏春景  张贵宾 《岩石学报》2017,33(10):3263-3277

金红石Zr温度计在研究高级变质岩的热演化过程中可以发挥重要的作用。而电子探针显微分析技术得益于其较小的分析束斑(直径1~2μm)和适中的轰击能量,通过合理的实验条件设定和仪器参数设置,是对薄片中金红石Zr含量进行原位分析的理想实验手段。本文中,我们对俄罗斯白海地区的太古代榴辉岩-退变榴辉岩中的金红石Zr含量进行了电子探针原位分析,并进行了金红石Zr温度计计算。结果表明,其中石榴子石包裹体类型(产状1)金红石的Zr含量比较稳定,主要集中在400×10~(-6)~500×10~(-6)范围,个别金红石颗粒中的Zr含量可以达到1000×10~(-6);而基质后成合晶中(产状2)金红石的Zr含量的波动范围则相对更广一些(200×10~(-6)~1000×10~(-6)),这可能与后期退变过程中的Zr重置和/或扩散有关。总体上,不同产状金红石的Zr温度计计算结果都给出了两个主要的温度区间:T1=700~750℃和T2=800~850℃。结合前人对白海榴辉岩变质温压条件的研究以及金红石Zr体系封闭温度的控制,我们认为金红石Zr温度计的计算结果区间T1更有可能代表的是榴辉岩的退变冷却温度,而温度区间T2则反映的是榴辉岩在抬升过程中受到高温麻粒岩相变质作用阶段的温度峰期条件。  相似文献   

2016-08-24缅甸M_S6.9地震热红外异常研究     

何案华  邓卫平  李国佑 《大地测量与地球动力学》2017,37(10):1092-1095

利用中国静止气象卫星FY-2E/G热红外亮温资料,采用小波变换和相对功率谱法对2016-08-24缅甸M_S6.9地震震前热红外资料进行分析。研究表明,地震震前存在显著的亮温变化,其热异常现象具体特征为:1)在2016-04-26开始出现热异常,相较以往震例表现出异常凸显、出现时间早且持续时间久的特点;2)异常区的时移性,该次异常区范围随时间推移逐渐扩大,至震前2个月左右异常面积达到最大,随后逐渐衰减直至完全消失;3)功率谱信息表现出增强的特征,异常持续时间在50d以上,特征周期为16d,最大相对变化率大于16倍。  相似文献   

变形石墨对构造- 热过程的定量约束及流变弱化意义   总被引：1，自引：0，他引：1  

曹淑云  吕美霞 《地质学报》2022,96(10):3573-3588

岩石变形过程的精细厘定是构造地质学研究中的难点和重点。石墨是碳的同素异形体，摩擦实验研究表明，增加少量石墨化碳质物能够显著降低岩石的摩擦系数和力学强度，具有固体润滑剂的流变学意义。本研究针对红河- 哀牢山剪切带新生代变形，开展了详细的野外观测和构造解析，针对不同变形- 变质程度的天然含石墨岩石样品，利用光学显微镜、场发射扫描电子显微镜、电子背散射衍射(EBSD)、拉曼光谱方法，开展了详细的显微及亚显微变质与变形构造、矿物晶格优选定向、石墨拉曼地质温度计应用等深入分析。发现深变质岩中，石墨晶体常常与黑云母共生且定向拉伸或生长，呈现出晶质片状、条带状、膝折等变形构造特征；在强烈塑性变形的岩石中，石墨表现出塑性到超塑性流动构造特征；细粒化石墨富集形成微型滑移带/面，承载流变弱化的“干”润滑作用；在低级变质- 弱变形岩石中，石墨有序度低，呈弥散状分布。EBSD组构显示石墨发育柱面、菱面到低温底面晶格滑移系，对应的石墨拉曼地质温度范围为600~500℃、530~460℃、450~400℃。变形石墨的位错滑移系具有与石英位错滑移系类似的演化特征，具有成为变形温度计的潜力。  相似文献   

广州夏季地基微波辐射计红外传感器观云性能分析     

潘赟  王振会  姜苏麟  雷连发  李青  马丽娜 《气象科技》2020,48(1):40-45

为进一步评估地基微波辐射计红外传感器的观云性能,收集了2017、2018两年5—7月布设在广州野外雷电实验基地的一台MWP967KV型地基微波辐射计红外传感器与一台K/LLX502B型激光测云仪观测的云底高度数据,并利用人工观测的天空状况、云状数据进行分类,在不同云类、天空状况下对地基微波辐射计红外传感器云识别和观测云底高度的性能进行分析。结果表明:①地基微波辐射计红外传感器具有良好的云识别能力,准确率达80.4%,由于观测视角的原因,未能识别出有云存在主要发生在"多云"情况下。②地基微波辐射计红外传感器与激光测云仪所测云底高度相关系数为0.63,有着较好的一致性。③因为观测原理不同,地基微波辐射计红外传感器所测云底高度总是高于激光测云仪,且两部仪器在低云阴天时所测的云底高度一致性要优于中、高云多云。综上所述,地基微波辐射计红外传感器用来识别云、观测云底高度具有一定的可行性,尤其是在低云、"阴天"条件下,有着较好的观云性能。  相似文献   

Relationship between coral growth rate and sea surface temperature in the northern part of South China Sea during the past 100 a   总被引：4，自引：0，他引：4  

Baofu Nie  Tegu Chen  Meitao Liang  Youqiang Wang  Jinliang Zhong  Yuanzhi Zhu 《中国科学D辑(英文版)》1997,40(2):173-182

To research the relationship between coral growth rate and sea surface temperatnre (T_ss), 5 cores of livingPorites lutea were collected from the Xisha Islands and the southern Hainan Island waters and measured. The results of the study show that there is an obviously positive correlation between the coral growth rates and theTss records from the northern part of South China Sea. The annual growth rates of the five samples ofPorites lutea during the past 100 a are in the range of 7—15 mm/a, and their mean value is 11 mm/a. The correlation coefficients between the coral growth rates and the T_ss records from the waters during 1961—1993 are in the range of 0.77—0.89. As a result, a thermometer of the coral growth rate is established. A hindcasting T_ss, in the waters from 1993 to 1961 has been obtained with an error of about 0.12—0.17°C. Based upon the calculated result, the rising rate of T_ss in the northern part of South China Sea during the past 100 a is 0.20°C. which is higher than that of the air temperature in China (0.09°C/100 a), but lower than that of the global temperature and that of T_ss in the tropical western Pacific Ocean. Project supported by the National Nutural Science Foundation of China and the Multidesciplinary Oceanographic Expedition Team of Chinese Academy of Sciences to the Nansha Islands.  相似文献