郑州市区断裂深循环型地热资源计算与评价     

李学问  师晶  刘玉梓  庞良  彭妮 《地下水》2009,31(6):140-142

地热资源是一利用前景广阔的新型清洁环保能源。对郑州市区断裂深循环型热储模型进行了分析,采用积存热量法（体积法）对断裂深循环型地热资源进行了计算与评价,最后提出建议：建议河南省加大地热资源勘查投入力度,严格执行有关行业标准,进行系统的地热勘查评价工作。  相似文献   

The biotic and environmental response to the geological events on the Earth during the Late Mesozoic.   总被引：1，自引：0，他引：1       下载免费PDF全文

LIU Yong-Qing KUANG Gong-Wei JI Shu-An LV Jun-Chang LIU Yan-Hua JIANG Xiao-Jun BANG Nan 《地学前缘》2009,16(5):37

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物源分析方法的综合运用 ——以苏北盆地高邮凹陷泰一段地层为例   总被引：4，自引：0，他引：4  

徐田武  宋海强  况昊  王英民  陈莉琼  齐立新 《地球学报》2009,30(1):111-118

目前高邮凹陷深层勘探以寻找岩性油气藏为主,准确预测岩性体储层是寻找油气藏的关键,而对岩性体做出准确的预测,需要对沉积时期的物源做出准确的判断。利用重矿物法、碎屑岩类分析法、沉积法对高邮凹陷的物源进行了分析。重矿物的相关性分析及R型聚类分析表明本区存在南北两大物源;碎屑岩类分析法表明本区物源来自再旋回造山带,砾岩和岩屑的分析表明本区也存在南北两大物源;沉积法表明本区除了南北两大物源外,还存在一个来自盆地西部菱塘低凸起的次级物源。结果表明：高邮凹陷泰一段沉积时期,存在3个方向的物源,分别来自凹陷南部的通扬隆起、北部的建湖隆起、西部的菱塘低凸起,物源对凹陷的贡献的大小也如上隆起顺序依次递减。  相似文献   

双误差回归模型在ICP-MS测定饮用水中锶的不确定度评定的简化应用     

郑松  况云所  赵平 《岩矿测试》2012,31(3):484-488

在计算电感耦合等离子体质谱法测定饮用水中锶的浓度(x)时,由于标准系列配制和仪器检测过程中信号(y)漂移产生的不确定度会传递给最终的计算结果。普通的一次或多次线性拟合结果不能真实地反映对于x、y值都含误差的数据拟合情况。文章对标准曲线进行了双误差回归计算,从双误差回归线性方程推导出校准曲线拟合过程产生不确定度的计算公式,建立了方法检出限与曲线拟合参数(x、y、曲线截距和斜率)及其相关不确定度之间的关系式,依据误差连续传递公式及不确定度分量计算公式简化了合成不确定度的表达式。从合成不确定度计算公式中可得出,水样中锶含量的浓度越低,其对应的不确定度越大;标准系列配制过程不细致、仪器灵敏度低,方法检出限越差,与实际测试情况符合。  相似文献   

Molar‐Tooth Structure from the Mesoproterozoic Wumishan Formation in Lingyuan,Yanshan Region,North China,and Geological Implications   总被引：1，自引：0，他引：1  

KUANG Hongwei  LIU Yongqing  PENG Nan  LUO Shunshe  LI Jiahu  CEN Chao  CHEN Mingpei 《《地质学报》英文版》2012,86(1):85-95

Although its origin has not yet reached a consensus so far, MTS (Molar-Tooth Structure) has been documented for more than 100 years. Current study reports a discovery of MTS from the Mesoproterozoic Wumishan Formation, Lingyuan, Yanshan Region, North China, and the features and geological implications of MTS are further discussed. Here, straitigraphic horizons of MTS’s occurrences show that it was mainly located within the top part of the Wumishan Formation, i.e., limestone unit. Four kinds of morphology of MTS, i.e., fine fusiform, debris, ribbon, ptigmatic and nodular (irregular), were recognized and thought to be highly related to the sedimentary environments and facies. Geochemistry of MTS including oxides, trace elements and C, O and Sr isotopes indicates that the horizons of MTS-bearing is of higher Sr/Ba and Ca/Mg ratios, lower positive δ13C and highly negative δ18O values than the adjacent stratigraphic levels of rare MTS. Lithology, morphology and geochemistry of MTS in the Wumishan Formation suggest that MTS occurs mainly in shallow subtidal near the storm wave base, which is typically characterized by warm temperature, oversaturated calcium carbonate seawater and high organic productivity. Furthermore, occasional enrichment of algae bacteria here is more favorable for the calcification of calcium oozes and catalytic for MTS. C isotope composition of the Wumishan Formation and MTS of this study is well correlated with that of the Mesoproterozoic Belt Supergroup, North America and Riphean, Siberia, suggesting that MTS acts as a sedimentary record responding to global changes and is a perfect indicator in Precambrian stratigraphic correlation worldwide.  相似文献   

Stratigraphy and Geochronology of Vertebrate Fossil‐Bearing Jurassic Strata from Linglongta,Jianchang County,Western Liaoning,Northeastern China     

PENG Nan  LIU Yongqing  KUANG Hongwei  JIANG Xiaojun  XU Huan 《《地质学报》英文版》2012,86(6):1326-1339

Northeastern China contains widely distributed Jurassic terrestrial strata that have yielded many spectacular mammal and pterosaur fossils, in addition to feathered dinosaur fossils and more recent discoveries from Jianchang, particularly from western Liaoning. However, the fossil-bearing stratigraphic succession, regional correlation, and age estimates of the fossils found in Jianchang County and nearby areas have been contentious. Here, we report on the vertebrate fossil-bearing Jurassic stratigraphy from Linglongta, Jianchang County, western Liaoning, including a SHRIMP U-Pb zircon date unambiguously associated with the fossil horizons. The primary goal was to determine the vertebrate fossil-bearing succession. A further aim was to provide age estimations for the fossil-bearing horizon as well as the earliest appearance of feathered dinosaurs, the eutherian–placental clade, and transitional pterosaurs. Field investigations showed that the vertebrate fossil-bearing stratigraphic succession in Jianchang County mainly consists of basal andesites overlain by rhythmic tuffs and tuffaceous lacustrine sediments, with the upper intermediate or acidic lavas interbedded with laminated more or less tuffaceous lacustrine deposits. This sequence correlates well with the Middle Jurassic Lanqi/Tiaojishan Formation in northeastern China. Detailed and accurate field observations showed that the well-preserved vertebrate fossils were buried in either the middle or the upper fine-grained laminated lacustrine deposits. Previous and current SHRIMP U-Pb zircon dates provide an age estimation of 161–159 Myr for the fossil-bearing horizon and vertebrates. This indicates that the earliest appearance of feathered dinosaurs here was more than 159 Myr ago and unquestionably older than Archaeopteryx from Germany, making these the earliest known feathered dinosaurs in the world. Furthermore, the eutherian–placental clade and the known transitional pterosaurs first emerged no later than 161 Myr. The vertebrate assemblage unearthed recently from Linglongta and neighboring areas in Jianchang County belongs to the Daohugou Biota. In addition to feathered dinosaurs, this biota was characterized by mammals, primitive pterosaurs, insects, and plants and was present in Inner Mongolia, western Liaoning, and northern Hebei in northeastern China during the Middle–Late Jurassic.  相似文献   

湘西南铜山岭地区钨多金属矿床地质特征及成矿机制探讨 ——以祥霖铺矿床为例   总被引：1，自引：0，他引：1       下载免费PDF全文

杨冲  申志军  匡文龙  张万虎 《地质找矿论丛》2012,27(2):156-161

祥霖铺夕卡岩型钨多金属矿床位于南岭纬向构造带的中段,矿床产于NE向、NW向和EW向断裂的交汇处,矿化集中赋存于背斜的倾伏端附近.通过对矿床地质特征、地球物理、地球化学特征等方面的研究,认为燕山期构造运动所导致的岩浆活动为矿床的形成提供了大量热源,区内的断裂构造为成矿提供了良好的构造条件,中泥盆统棋梓桥组在成矿过程中提供了大量的物质来源;在夕卡岩化过程中形成了不同的矿物组合,成矿过程可以分为2个成矿期、4个成矿阶段;预测在矿区的西部有望找到隐伏矿体.  相似文献   

顾及三维方向的GNSS坐标时间序列粗差探测方法     

许炜  吕志平  董行  邝英才  杨凯淳  黄辉 《大地测量与地球动力学》2021,41(10):1018-1023

针对GNSS坐标时间序列中粗差为三维位置粗差的特点,提出综合三维坐标的迭代最小二乘粗差探测方法。通过实验模拟数据,分别利用3倍中误差（3σ）准则和四分位距（interquartile range, IQR）准则对单方向和综合N、E、U三方向的粗差进行探测。结果表明,2种判别准则中,综合考虑3个方向的探测效果远好于单方向的探测效果,且探测效率均超过95%;3σ准则的探测效率稍高于IQR准则,但误判率也较高。在实测数据中的应用表明,SOPAC(Scrips Orbit and Permanent Array Center)提供的部分raw类型全球IGS站时间序列中粗差占0.1%~4.7%;运用IQR准则综合3个方向的粗差探测得到的时间序列要比cleaned trend类型更加干净。  相似文献   

贵州省平坝外郎田地区上二叠统合山组的层序地层及沉积特征     

况忠  黎勇  黄欣欣 《贵州地质》2011,(4):290-294

本文从层序界面和基本层序特征入手,对平坝外郎田地区的合山组进行了层序地层划分和研究,并探讨了成煤阶段与层序地层间的关系和沉积特征。  相似文献   

兴蒙造山区及邻区早白垩世盆地岩石地层格架 与沉积古地理演化   总被引：2，自引：0，他引：2  

旷红伟  柳永清  刘燕学  彭楠  许欢  董超  陈军  刘海  徐加林  薛沛霖 《地质通报》2013,32(7):1063-1084

在重点梳理兴蒙造山区及其相邻地区早白垩世地层分布与沉积古地理特征的基础上,从地层沉积学角度探讨了研究区早白垩世沉积盆地特征。兴蒙造山区中东部在晚侏罗世巨厚粗碎屑沉积建造之上发育了巨厚的酸性－中性火山岩－火山碎屑岩与河流－湖泊相沉积岩系,构成中国东北部巨型NE向火山岩－沉积岩带。兴蒙造山区中东部早白垩世早中期以断陷（裂谷）盆地为主,古地貌以高地、河流和湖泊共存为特征,气候温湿且炎热,热河生物群萌生;早白垩世中晚期,北东向地壳强烈伸展并进一步向外围地区扩展,沉积盆地及充填建造和热河生物群也相应地向更广泛区域辐射发展。兴安岭-燕山沉积-火山岩带与古太平洋板块俯冲无关,板内软流圈上涌导致的区域性伸展是其主要的成因动力机制,也是中国东部早白垩世中晚期更大规模区域性伸展作用的序幕。兴蒙东部早白垩世晚期沉积盆地发育和古地理格局受Izanagi板块向亚洲大陆东部俯冲弧后伸展构造机制约束。  相似文献