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Archean relic body at lower crust in Sulu area:Evidence from magnetic data

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Chinese Science Bulletin 2003年第6期48卷 589-593页

作者： WU Qifan1,2, LU Fengxiang3. LIU Qingsheng3. ZHENG Jianping3. wang Maoji2 & WU Wenli4.1. Department of Engineering Physics, Tsinghua University, Beijing 100084. China 2. Aero {4. Survey & Remote Sensing Center, Beijing 100083. China 3. China University of Geosciences, Wuhan 4.0}074. China 4. institute of {4. & geochemical Exploration, Langfang 065000, China Aero geophysical Survey & Remote Sensing Center Beijing 100083 China China University of Geosciences Wuhan 430074 China institute of geophysical & geochemical Exploration Langfang 065000 China Department of Engineering Physics Tsinghua University Beijing 100084 China

After the new 1︰1000000 aero magnetic data were processed and the three-dimensional inversion work was carried out, a vast high magnetic body northwestward was discovered. The magnetic body is located at the depth of about 20 km on the west side of Tanlu fault and at about 25 km on the east side of Tanlu fault beneath the Sulu area. There is a difference of vertical distance of 3.5 km in depth between both sides. We think that the magnetic body is an Archean metamorphic plate and belongs to the North China block. The discovery of the magnetic body is significant for us to reconstruct the structure model of the Sulu orogenic belt, delineate the suture of collision between the North China block and the Yangtze block, and estimate the depth of slipping surface when the eastside of Tanlu fault moved northward.

关键词：苏鲁地区地壳下层太古代残余体地球物理调查区域性磁场三维反演苏鲁造山带郯鲁断裂带大别-苏鲁超高压变质带

Digital Element Earth

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Acta Geologica Sinica(English Edition) 2011年第1期85卷 1-16页

作者： xie xuejing wang {3. CHENG Hangxin CHENG Zhizhong YAO Wensheng institute of geophysical and geochemical Exploration CAGS 84 Jinguang Road Langfang Hebei Province 065000 China

The resources and environmental problems are the two most fundamental issues facing all nations in the world. Everything in and on the Earth - minerals, animals and plants -is made from one, or generally some combination of, chemical elements, which are scientifically listed in the periodic table. Thus it is important to understand the present abundance and spatial distribution of all the elements across the Earth＇s surface. Such kinds of data can only be obtained at present and for the foreseeable future by on-earth geochemical mapping at all scales. The 3.-year efforts made by Chinese geochemists in carrying out multi-element, multi-media, multi-scale geochemical mapping projects to delineate 3.-76 element distribution at home and abroad culminated in a successful case of high- quality geochemical data acquirement. The new idea for a four-level plan for global geochemical mapping was advanced to obtain global data in the foreseeable future and the collection of updated geochemical information. Such information needs to be easily accessible not only by the science community, but also by industry, agriculture, governments, and even individuals, by all who would make an effort to promote sustainable riving on our planet. The concept of a Digital Element Earth （DEE） fulfills the aims.

关键词： Digital Element Earth chemical elements geochemical mapping sustainable development

Comparison of results analyzed by Chinese and European laboratories for FOREGS geochemical baselines mapping samples

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Geoscience Frontiers 2011年第2期2卷 247-259页

作者： Wensheng Yao xuejing xie xueqiu {3. institute of geophysical and geochemical Exploration CAGS 84 Jinguang Road Langfang Hebei 065000 China

geochemical subsoil data obtained from China and European laboratories have been compared in this study. 787 C horizon subsoil samples from FOREGS （Forum of European Geological Surveys） geochemical baselines mapping project were sent to China＇s IGGE （institute of {3. and geochemical Exploration） laboratory and composited to 190 samples according to the 160 kin x 160 km GNT （Global Terrestrial Network） cells. In addition to the FOREGS elemental analysis package, Au, Pt, Pd, B, Ge, Br, CI, Se, N, Li and F were also analyzed by using the IGGE＇s 76 element analytical scheme. geochemical data statistics, scatter plotting, and geochemical map compilation tech- niques have been employed to investigate differences between FOREGS and IGGE analytical results. The results of two datasets, the IGGE＇s analysis data for composited samples, and the FOREGS average data of samples in each GNT cell, agree extremely well lor about 23.elements, viz： SiO2, St, Al2O3. Zr, Ba, Fe2O3. Ti, Rb, Mn, Gd, CaO, Ga, MgO, P, Pb, Na2O, Y, Th, As, U Sc, Cr, and Co. There are slight differences between-laboratory biases shown as proportional errors between the datasets for Ni, K2O, Tb, Tl, Cu, S, Sin, La, Ce, Pr, Nd, Eu, Ho, Er, Tin, Yb, Lu, Ta, Nb, HE and Dy. For Cd, Cs, Be, Sb, In, Mo, I, Sn, and Te, the correlation of the two datasets and the similarity of the geochemical maps are fairly good, but obvious biases exist between the two datasets at values near detection limits.

关键词： geochemical mappingAnalytical method Analysis data FOREGS Soil samples

A Microscopic and Nanoscale Understanding of the Formation of Gold geochemical Provinces

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Acta Geologica Sinica(English Edition) 2014年第3期88卷 995-1003页

作者： YE Rong wang xueqiu ZHANG Bimin School of the Earth Sciences and Resources China University of Geosciences institute of geophysical and geochemical Exploration Chinese Academy of Geological Sciences Key Laboratory of geochemical Exploration Ministry of Land and Resources of P.R.China

Gold geochemical provinces in China were delineated through stream sediment or catchment sediment sampling in this *** gold geochemical province delineated by a threshold value of 2.5 ng/g covers an area of thousands of *** is a dilemma that geochemists traditionally thought that gold could not migrate for a long distance in rivers or streams to form a large-scale geochemical anomaly due to its chemical inertness and high specific *** quantitative spectroscopic analysis and observations under a scanning electron microscope （SEM） indicate the presence of submicroscopic gold particles （〈5 μm in diameter） in large quantities,and observations under a Transmission Electron Microscopy （TEM） further suggest the presence of nanoscale gold particles （several tens of nanometre in diameter） in ores,rocks,soils and stream ***,submicroscopic and nanoscale gold particles less than 5 μm were only found in samples having a low gold content （〈10ng/g）.This result shows that geochemical provinces,delineated by a threshold value of 2.5 ng/g,are formed by long-distance transport of ultrafine gold in *** findings may provide direct microscopic evidence for gold migration to form geochemical provinces.

关键词： Gold geochemical Provinces Formation Mechanism Microscopic particles nanoscaleparticles

Late Paleozoic Element Migration and Accumulation under Intracontinental Sinistral Strike-slip Faulting in the West Junggar Orogenic Belt, NW China

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Acta Geologica Sinica(English Edition) 2020年第6期94卷 2012-2030页

作者： wang Ye CHEN Xuanhua NIE Lanshi DING Weicui wang xueqiu XU Shenglin MA Feizhou HAN Lele SinoProbe Center Chinese Academy of Geological Sciences and China Geological SurveyBeijing 100037China institute of geophysical and geochemical Exploration Chinese Academy of Geological SciencesLangfangHebei 065000China China University of Geosciences Beijing 100083China

The migration,accumulation and dispersion of elements caused by tectonic dynamics have always been a focus of attention,and become the basis of ***,the effects of faulting,especially strike-slip faulting,on the adjustment of geochemical element distribution,are still not *** this paper,we select the West Junggar Orogenic Belt(WJOB),NW China,as a case study to test the migration behavior of elements under tectonic *** WJOB is dominated by NE-trending large-scale sinistral strike-slip faults such as the Darabut Fault,the Mayile Fault,and the Baerluke Fault,which formed during the intracontinental adjustment under N-S compression during ocean-continental conversion in the Late *** maps of 13.elements,Al,W,Sn,Mo,Cu,Pb,Zn,As,Sb,Hg,Fe,Ni,and Au,are analyzed for the effects of faulting and folding on element distribution at the regional *** results show that the element distribution in the WJOB is controlled mainly by two mechanisms during tectonic deformation:first is the material transporting mechanism,where the movement of geological units is consistent with the direction of tectonic movement;second is the diffusion mechanism,especially by tectonic pressure dissolution driven by tectonic dynamics,where the migration of elements is approximately perpendicular or opposite to the direction of tectonic *** conclude that the adjustment of element distributions has been determined by the combined actions of transporting and diffusion mechanisms,and that the diffusion mechanism plays an important role in the formation of geochemical Au blocks in the WJOB.

关键词： tectono-geochemistry strike-slip fault system element distribution gold West Junggar Central Asian Orogenic Belt

二氧化锰改性粉煤灰制备及其对地下水中砷的吸附特性

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地球科学 2024年第3期49卷 1005-1016页

作者：王丽楠杨保国谢作明赵欣鑫石天池中国地质大学环境学院湖北武汉430078 宁夏回族自治区地球物理地球化学调查院宁夏银川750001 中国地质大学生物地质与环境地质重点实验室湖北武汉430078

高砷地下水在我国广泛分布,开发绿色高效的除砷材料对于促进地区发展和保障居民饮用水安全具有重要意义.采用共沉淀法结合NaOH水热处理技术制备了二氧化锰改性粉煤灰吸附材料MFA150,并研究其对地下水中As(Ⅲ)和As(Ⅴ)的吸附特性.结果表... 详细信息

高砷地下水在我国广泛分布,开发绿色高效的除砷材料对于促进地区发展和保障居民饮用水安全具有重要意义.采用共沉淀法结合NaOH水热处理技术制备了二氧化锰改性粉煤灰吸附材料MFA150,并研究其对地下水中As(Ⅲ)和As(Ⅴ)的吸附特性.结果表明,NaOH水热处理破坏了原始粉煤灰的玻璃体结构,且在这一过程中生成沸石相,粉煤灰比表面积由1.3. m^(2)/g增加至4..26 m^(2)/g.在负载MnO2后,MFA150比表面积达到14..82 m^(2)/g.此外,吸附材料表面-OH的含量显著增加,为As(Ⅲ)和As(Ⅴ)提供了更多的吸附活性位点.MFA150对As(Ⅲ)和As(Ⅴ)的吸附过程符合Elovich模型和Freundlich模型.在中性条件下MFA150对As(Ⅴ)和As(Ⅲ)的吸附量分别达到2.55 mg/g和9.71 mg/g,酸性条件更有利于吸附.溶液中共存的HCO_(3.-和PO_(4.^(3.)会抑制As(Ⅲ)和As(Ⅴ)的吸附,而SO_(4.^(2-)对As(Ⅲ)和As(Ⅴ)的去除具有轻微促进作用.在模拟地下水中,MFA150对总砷的去除率达到91.90%.MFA150制备方法简单,制备原料廉价易得,吸附性能好有望用于含砷地下水处理.

关键词：高砷地下水粉煤灰锰氧化物吸附资源化利用环境地质

Characteristics and main controlling factors of helium resources in the main petroliferous basins of the North China Craton

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Acta Oceanologica Sinica 2024年第2期43卷 23-33页

作者： Zihan Gao Zhi Chen Hongyi He Zhaofei Liu Chang Lu Hanyu wang Yili Luo Ying Li institute of Earthquake Forecasting China Earthquake AdministrationBeijing 100036China College of Geosciences China University of Petroleum-BeijingBeijing 102249China School of Earth Science and Resources China University of Geosciences(Beijing)Beijing 100083China

At present, the main controlling factors of helium accumulation is one of the key scientific problems restricting the exploration and development of helium reservoir. In this paper, based on the calculation results of He generation rate and the geochemical characteristics of the produced gas, both the similarities and differences between natural gas and He resources in the Bohai Bay, Ordos and the surrounding Songliao Basin are compared and analyzed, discussing the main controlling factors of helium resources in the three main petroliferous basins of the North China Craton. It is found that the three basins of Bohai Bay, Ordos and Songliao have similar characteristics of source rocks, reservoirs and cap rocks, that's why their methane resource characteristics are essentially the same. The calculated ~4.e generation per cubic metamorphic crystalline basement in the three basins is roughly equivalent, which is consistent with the measured He resources, and it is believed that the ~4.e of radiogenic from the crust is the main factor controlling the overall He accumulation in the three basins;there is almost no contribution of the mantle-derived CH_4. which suggests that the transport and uplift of mantle-derived ~3.e carried by the present-day magmatic activities along the deep-large faults is not the main reason for the mantle-derived ~3.e mixing in the basins. Combined with the results of regional volcanic and geophysical studies,it is concluded that under the background of the destruction of North China Craton, magma intrusion carried a large amount of mantle-derived material and formed basic volcanic rocks in the Bohai Bay Basin and Songliao Basin, which replenished mantle-derived ~3.e for the interior of the basins, and that strong seismic activities in and around the basins also promoted the upward migration of mantle source ~3.e. This study suggests that the tectonic zone with dense volcanic rocks in the Cenozoic era and a high incidence of historical strong ear

关键词： Helium Bohai Bay Basin destruction of the North China Craton fault Cenozoic volcanic rocks strong earthquake activity

Silurian granulite-facies metamorphism,and coeval magmatism and crustal growth in the Tongbai orogen,central China

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Silurian granulite-facies metamorphism,and coeval magmatism ...

An integrated north–south paleo-Dadu-Anning River: New insights from bulk major and trace element analyses of the Xigeda Formation

中国矿物岩石地球化学学会第13.学术年会

作者： wang Hao~1,WU Yuan-bao~(1,2),GAO Shan~1,ZHANG Hong-fei~1, LIU Xiao-chi~1,GONG Hu-jun~2,PENG Min~3.wang Jing~4.YUAN Hong-lin~2 1.State Key Laboratory of Geological Processes and Mineral Resources,Faculty of Earth Sciences,China University of Geosciences, Wuhan 4.1}074.China 2.State Key Laboratory of Continental Dynamics,Department of Geology,Northwest University,Xi’an 710069,China 3.institute of {3. and geochemical Exploration CAGS,Langfang 065000,China 4.Anhui institute of Geology,Hefei 23.001,China

It is intriguing whether the formation of granulite in an orogenic belt is related to magmatism and crustal *** Tongbai orogen is one of the particular areas in the Qinling-Tongbai-Dabie-Sulu orogen that contains both granulites and associated arc magmatic rocks,and thus is an optimal place to address this ***,the formation age and genesis of the granulites and their relations to the magmatic rocks have not yet been well *** situ LA(MC)-ICPMS U-Pb dating,and trace element and Lu-Hf isotope analyses were undertaken on zircon grains from gneiss,granulite,gabbro and granodiorite *** zircons in three granulite samples and a gneiss sample have core-rim *** cores have oval or rounded shapes,oscillatory zones,high Th/U ratios and variable U-Pb ages,suggesting a detrital *** youngest group of the detrital zircons yields a weighted mean pb/U age of(4.0-±5) Ma,which is interpreted as the maximum depositional age of their protoliths.A major age cluster is ca.4.0～4.0 Ma,corresponding to prolonged arc magmatism in the northern Tongbai and Qinling *** group of ages range from 660 to 950 Ma,implying that the Qinling Group

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China Geology 2024年第1期7卷 91-103页

作者： Yong Zheng Hai-bing Li Jia-wei Pan Ping wang Ya Lai Zheng Gong Key Laboratory of Deep-Earth Dynamics Institute of GeologyChinese Academy of Geological SciencesChina Geological SurveyMinistry of Natural ResourcesBeijing 100037China Jiangsu Donghai Continental Deep Hole Crustal Activity National Observaion and Research Station Lianyungang 222300China Southern Marine Science and Engineering Guangdong Laboratory Guangzhou 511458China geophysical Exploration Center China Earthquake AdministrationZhengzhou 450002China institute of Geophysics China Earthquake AdministrationBeijing 100081China

The Xianshuihe-Anninghe fault extends SE–S and constitutes the southeastern margin of the Tibetan ***,the Dadu River which is associated with the fault does not flow following the path,but makes a 90ºturn within a distance of 1 km at Shimian,heading east,and joins the Yangtze River,finally flowing into the East China *** to the abrupt turn,a low and wide pass near the Daqiao reservoir at Mianning separates the N–S course of the Dadu River from the headwater of the Anning River which then flows south into the Yunnan Province along the Anninghe ***,many previous studies assumed southward flow of the paleo-Dadu River from the Shimian to the Anning ***,evidences for the capture of the integrated N–S paleo-Dadu-Anning River,its timing,and causes are still *** study explored the paleo-drainage pattern of the Dadu and Anning Rivers based on bulk mineral and geochemical analyses of the large quantities of fluvial/lacustrine sediments along the trunk of the Dadu and Anning *** with sands in the modern Dadu River,the Xigeda sediments also exhibit a granitoid affinity with the bulk major mineral compositions of quartz(>50%),anorthite(about 10%),orthoclase(about 5%),muscovite(about 5%),and clinochlore(about 4.).Correspondingly,bulk major elements show high SiO_(2),with all samples>60%,and some of them>70%,low TiO_(2)(≤0.75%),P_(2)O_(5)(≤0.55%),FeO*(≤5%),and relatively high CaO(1.02%–8.51%),Na_(2)O(1.60%–2.52%),and K_(2)O(2.17%–2.71%),with a uniform REE ***,synthesizing all these results indicate that these lacustrine sediments have similar material sources,which are mainly derived from its course in the Songpan-Ganzi flysch block,implying that the paleo-Dadu originally flowed southward into the Anning River and provided materials to the Xigeda ancient *** rearrangement of the paleo-Dadu River appears to be closely related to the locally focused uplift driven by strong activities of the Xians

关键词： Dadu River Anninghe fault River diversion Xigeda Formation Tectonic uplift Provenance Songpan-Ganzi flysch Ancient lake Xianshuihe-Xiaojiang fault system Tibetan Plateau