水文地球化学及水文地球动力学异常图像是短期地震预测实用化方法(以阿拉木图预报实验场为例)(外文)

Впрежнихпубликацияхнамиразвиваласьконцепцияобавтономной,локальнойгенерацииГГХпредвестниковыханомалийнаканунеземлетрясения[1～ 5] .Такаямодельбазироваласьнаиндивидуальнойинформативностикаждойнаблюдательнойстанциивпрямойзависимостиотгеолого- структурнойилито…     

~(40)Ar/~(39)Ar dating of shear deformation of the Xianshuihe fault zone in west Sichuan and its tectonic significance

TheNW-SEstrikingXianshuihefaultzoneslicesthesoutheasternTibetanPlateauandconnectssoutheastwardwiththeAnninghe-Zemuhe-Xiaojiangfaultzone,whichformahuge,activesinistralstrike-slipfaultzone(fig.1).ThisfaultzoneisanimportantseismicfaultineastTibet[1-5].EarthquakegeologystudiesandoffsetpatternsofyounggeologicalfeatureshaveshownthatlateQuaternarysinistralsliprateoftheXianshuihefaultzonereaches13mm/a[1,2].TheXianshuhefaultzoneconsistsoftwomainbranches,theDaofufaultbranchinthewestandtheXianshuih…     

二维高斯迭代平滑滤波曲率属性及其应用

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利用IPA技术精细识别裂缝——以柴达木盆地南翼山工区为例

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关于单点高密度地震数据的室内组合分析

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相位拟合法的去调谐效应研究

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基于改进的广义S变换的低频阴影检测

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Complicated responses of stalagmite δ ~(13)C to climate change during the last glaciation from Hulu Cave, Nanjing,China

Secondary carbonates deposited inside caves have been considered as good archives of past climate variations at orbital, millennial to centennial, and de-cadal to annual timescales[1-3]. Change in δ 13C value is generally believed to reflect a change in the ratio of C4 to C3 plants, which have different photosynthetic pathways[4]. However, for given vegetation, the bio-genic CO2 production in soils can cause δ 13C to vary from ?12‰ to ?4‰[5]. Also, enhanced precipitation can lead to rapi…     

大凉山断裂带温泉水文地球化学特征

2010—2021年对大凉山断裂带10个温泉开展采样,测定了15个水样中的常量元素和氢氧同位素,进行温泉水文地球化学特征研究,建立了温泉水文地球化学循环模型。研究结果表明：(1)δD、δ¹⁸O的测量值分别为-86.8%～-100.54%和-11.7%～-13.7%,分布于大气降水线附近,表明大凉山断裂带温泉水主要为大气降水补给,其补给高程为2.1～2.5 km;(2)温泉水化学类型主要有HCO₃-Ca·Mg、SO₄·HCO₃-Ca·Mg、HCO₃-Ca、HCO₃-Na·Ca、HCO₃-Na和SO₄·HCO₃-Ca;(3)主量元素来自碳酸盐矿物和硅酸盐矿物的水-岩反应;(4)Na-K-Mg三角图表明该区温泉水样均为未成熟水;(5)运用硅-焓模型图解法得到该区热储温度为105.9℃～203℃,冷水混入比例约为68%～86%,其循环深度为1.9～3.9 km;(6)循环深度越深,地震活动性越强。     

Analysis on the decadal scale variation of the dust storm in North China

Dust storm is a disastrous weather that can cause serious environmental consequences and hazards. It causes excessive soil mass and nutrient loss in source areas, and air pollution in deposition area, which result in bad influence on agriculture, industry, traffic, and peoples’ daily life[1-4]. Dust storm can also affect the thermal balance of planetary radiation and then lead to meso- to macroscale climatic modification[5-7]. North- west China and North China are two high-frequency centers …     

Seismic multi-arch structures in East China

The deep seismic reflection method has been play-ing an important role in revealing lithospheric struc-tures as well as geodynamic processes within the crustand uppermost mantle[1-3]. After careful analyzing the deep seismic reflection profiles along some of the Mesozoic plutons, the author found that the crustalstructures around these intrusions usually correlate with a special seismic fabric called the seismic multi-arch structure[1]. A seismic multi-arch structure consists of some arch refl…     

Differential retardation of organic matter maturation by overpressure

Thetraditionalhydrocarbongenerationmodeldoesnottakeintoaccounttheeffectofpressure[1].Astotheroleofpressureinorganicmattermaturationandpetroleumgeneration,threeconflictingopinionshaveeverbeenproposed:(1)Increasingpressurehasnodetectableeffectonorganic-mattermaturation[1,2];(2)increasingpressureenhanceshydrocarbon-thermaldestruction[3];(3)increasingpressuresignificantlyretardsorganic-mattermaturationandhydrocarbongeneration[4,5].Therearemorethan180overpressuredbasinsintheworld.Theroleofoverpress…     

地球内核处于熔融状态

地球的磁场是由液态铁核形成的地磁发电机所产生的,这种液态铁核在上覆层地幔岩石的冷却下导致对流.地核由最里面向外冷却,生成固态的内核和释放轻元素.这些驱动着组分上的对流[1-3].地幔从地核以一定的速率吸收了热量,且吸热速率在空间上存在着很大的横向变化和差异[4].本文利用地磁发电机模拟显示这种横向差异会传递至内核边界,从而足以导致热量流入内核.如果地球内部确实是这样,将导致局部的熔融作用.熔融释放密度较重的液体形成变化的组分层,这一点可由内核上边界向上150 km处的地震波速度异常来解释[5-7].     

Diatom assemblages and quantitative reconstruction for paleosalinity from a sediment core of Chencuo Lake,southern Tibet

Changing salinity in lakes and especially in closed lakes depends mainly on the balance between precipitation, runoff and evaporation in arid and semi-arid areas, hence influencing lake levels di-rectly[1-4]. Past salinity has been recovered by a vari-ety of environmental indicators from lake sediments such as diatoms, chironomids, ostracoda, isotopes of ostracoda shells, geochemistry, and isotopes of authi-cabonates[3,5—10]. Recently, with extensive data-base study on diatom-salinity transfe…     

Direct evidence of transformation from smectite to palygorskite: TEM investigation

Palygorskiteusuallyisonlyaminorcomponentofmodernsedimentsandsoils.Onlyinspecificenvi-ronmentscanitoccurinlargeamountsandformeco-nomicaldeposits.Inspiteofitsscarcity,thismineralhasbeenrecordedinnumerousenvironments,rangingfromdeepseaandperitidalflatstosoilsandlacustrinesedimentaryrock[1—4].Palygorskiteinsedimentaryrocksandsoilscanbeofthreedifferentorigins:inherited,detritalandauthigenic[5].Theformationmechanismsofauthigenicpalygorskitearestillcontroversial,andvariousproc-esseshavebeenproposedf…     

《防灾减灾工程学报》文后参考文献表著录示例

专著：[1]李宏男.结构多维抗震理论与设计方法[M].北京：科学出版社,1998. Li H N.Theoretical Analysis and Design of Structures to Multiple Earthquake Excitations[M].Beijing：Science Press,1998.     

新源地震台前兆数据跟踪分析典型事件浅析

前兆数据跟踪分析工作开展以来,各区域前兆台网开展了如何改善跟踪分析质量及推进产出应用、台网观测背景等方面的研究[1-3],部分前兆观测台站也就自身存在的问题提出解决方案[4],前兆数据异常排查与判断方法也进一步拓展和深入[5-8].新源地震台始建于20世纪70年代,前兆观测以形变学科为主,2015年5月对原有的前兆观测...     

Effect of gas emissions from Tianchi volcano (NE China) on environment and its potential volcanic hazards

One of largest eruptions in the Tianchi volcano during the Holocene occurred in about 1000 years ago[1―3]. The volcanic ash erupted had been found in Japan, which is more than 1000 km from the Tianchi volcanic vent[4,5]. Moreover, this eruption has been recognized in the study of Greenland ice core (GISP2)[6,7]. There have been many studies about eruption products of the Tianchi volcano, which dominantly focused on petrological, geochemical and volcanic eruptive dynamic aspects[8―10]. On…     

Salt-related structural styles of Kuqa foreland fold belt,northern Tarim basin

It is indicated that the salt beds have a bearingupon the hydrocarbon accumulation more than 80%discovered oil-gas reserves of the world[1]. The saltbeds can change the occurrence of overlying horizons,forming various structural traps[2,3]. The salt bed itselfis the most effective caprocks. The deposits ofhigh-saliniferous environment may have favorablepetroleum-generating conditions[4]. The salt beds withlow specific thermal conductivity may result in highergeothermal gradient of sub-salt str…     

Synchrotron radiation X-ray diffraction in situ study of fine-grained minerals in shock veins of Suizhou meteorite

The Suizhou meteorite is an L6chondrite,which fell on April15,1986in Dayanpo,12.5km in the southeast of Suizhou City,Hubei Province,China[1].This meteorite is shock-metamorphosed to shock stage3—4[2].A few thin shock melt veins of0.02—0.09mm in width were observed in this chondrite[1,2].Similar to many other L6chondrites[3—5],the Suizhou shock veins contain two assemblages of high-pressure minerals[2,6—8]:(i)the“coarse-grained”assemblage of ringwoodite+majorite+NaAlSi3O8-hollandite…