THRUST TECTONICS AND RELATED CROSS-SECTION BALANCING IN THE SOUTHWESTERN FUJIAN FORELAND FOLD AND THRUST BELT

l-Intr0ductionThesouthwestemregionofFujianprovinceinChinawasregardedastheforelandfoldandthrustbeltbelongingtotheTnassicS0uthChinaOrogenicZone(Lijiliang,l992).Thethrustandnappetectonics,whichdevelopedwidelyinthisregion,havebeenstudiedforoveradecadebymanyChinesegeologists(suchas,HouQuanling,LiPeijun&LiJiliang,1995,HouQuanling,&LiJiliang,l993,GuanYuxiang&YangTianshui,l994,GuanYuxiangetc.l989,TaoJianhua,l987,etc.).Basedontheachievementsmadebythosegeologyworkersandourownresearches,thetyP…     

招远大尹格庄金矿床微量元素特征及其意义

该文以山东招远大尹格庄金矿床中微量元素为研究对象,通过对矿床围岩、矿石等微量元素的研究,表明大尹格庄金矿围岩中微量元素以富含 Bi,Au,Pb,W,Ag,Sn 为特点,矿体和矿化体中元素组合为 Au,Ag,As,Sb,Hg,B, Cu,Zn,Bi,Mo,Mn,Co,Ni,W。在5个成矿阶段中,第二阶段与第三阶段微量元素的富集程度较明显,表现为 Au, Ag,As,Co,Bi,Cu,Pb,Zn 等的富集,成矿元素可分为2个分带序列,主成矿元素为 Au Ag Cu Pb Zn Bi 组合、头晕元素 As Sb Hg 组合和尾晕元素 Co Ni 组合。     

平阴县浅层地下水地球化学环境质量评价

平阴县浅层地下水调查采样密度为1点/16km2,分析测试27项指标的含量变化规律后,认为调查区浅层地下水中除K,Mn,NO-2等指标含量变化较大,局部富集外,其他指标含量变化小,在浅层地下水中分布较均匀.选择As,Ba,Be,Cd,Co,Cu,Fe,Hg,Mn,Mo,Ni,Pb,Se,Zn,F-,Cl-,Cr6+,NO-2,COD,pH等20项指标,按<地下水质量标准>对浅层地下水环境质量进行的单因子和综合评价,结果显示较好级以上者达88.4%,而较差级仅占11.6%,无极差级分布,调查区内浅层地下水环境质量状况良好.     

Distribution of Selected Critical Elements in the Carboniferous Coal-bearing Series of the Upper Silesian and Lublin Coal Basins (Poland)

The distribution of selected critical elements in the sedimentary rocks of the Carboniferous coal-bearing series within the Polish Coal Basins is presented.Critical elements such as Be,Mg,Si,P,Sc,V,Co,Y,Nb,In,Sb,La,Ce,Hf,Ta,W,Bi were analysed using inductively-coupled plasma mass spectrometry(ICP/MS).Concentrations of elements such as Sb,Bi,In and,to a slightly lesser extent,Nb,as well as Sc,show average concentrations higher than those from the upper continental crust.The average concentrations of elements like Hf,Mg,P,Y,La,and Ce are slightly lower than in the upper continental crust.Other elements,such as Be,Co,Si,Ta,W and V have average concentrations that are similar,but slightly enriched or slightly depleted,relative to the upper continental crust.The research showed enrichment of some critical elements in the analysed samples,but not high enough that extraction would be economically viable.Statistical methods,which include correlation coefficients between elements and cluster analysis,reveal a strong positive correlation between elements like Be,Bi,Nb,Sc,Ta,W and V.Very high,almost total,positive correlation is also noted between La and Ce.     

LIST OF NEW MEMBERS

A.凡now吕舍具Brooke,N.P.束四牌楼瞪士胡同福公司搏Chow,K.C.周阴基,子建,湖北大冶孩瘫探鞍股Drake,F.5.,Shantung ohristian University,T,inan,Shantuug.Edmond,Jilla西直四外尸,颐裤煤蛾公司Garretson,Mary Welleek,Colu一n飞,ia University,New York City,U.5.A.Hsu,Y.M.徐渊摩,厚甫,北京女子大率徐竟甫收搏Kao,L.高鲁,曙青,北京中央觑象台King,sohtsu G.金招基,叔初,北京嘎嘎胡同Kil:g,Kunpei c.金城,常伯,北京束城技搔胡同Kobayashi,B.小林胖生,热河阜新森大典煤绩公司K,ung,K.H.孔夏锹,章虎,北京都城煌厢街Liu,0.F…     

浙北地区土壤元素有效量及其影响因素研究

浙江省北部地区调查研究表明,受成土母质来源、土壤类型及其理化性质等因素的影响,土壤元素全量、有效量及其有效度表现为:1)低山丘陵岗地土壤中As,Cd,Mo,Pb和Se全量较高,As,Cd,Fe,Pb,Se和Zn有效量较高;而山前平原区土壤中Hg,Pb和Zn元素全量较高,由地表向深部的下降递度较小,显示为原始沉积成因特点。2)中酸性、富含有机质的红壤和水稻土中As,Cd,Cu,Fe,Mn,Pb,Se,Zn等元素有效度较高,水稻土Hg有效度最低;弱碱性或碱性、贫有机质的潮土和滨海盐砂土中As,Cd,Cu,Fe,Mn,Pb,Se,Zn等元素有效量较低,但B有效量及有效度均较高。3)统计分析表明,土壤中Mn,Cu,Zn,Mo,Cd,Pb,Se等元素全量与有效量间具显著正相关性,表明全量是有效量的重要影响控制因素;有机质含量与Fe,Cu,Zn,Cd,As和Pb有效度间为显著正相关,说明有机质较高有利于土壤元素活化;Fe,Cu,Zn,Cd,As,Pb和Se有效度与pH值为显著负相关,表明土壤酸性增强(酸化)会增加这类元素的生物有效性。     

http://www.sciencedirect.com/science/article/pii/S1674987111000193

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 Geophysical and Geochemical Exploration) laboratory and composited to 190 samples according to the 160 km 160 km GNT (Global Terrestrial Network) cells. In addition to the FOREGS elemental analysis package, Au, Pt, Pd, B, Ge, Br, Cl, 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 techniques 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 for about 23 elements, viz: SiO2, Sr, 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, Sm, La, Ce, Pr, Nd, Eu, Ho, Er, Tm, Yb, Lu, Ta, Nb, Hf, 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. Sensitivities of FOREGS analytical methods for W, Bi, Sn, Te, Be, and I are insufficient to produce reportable values in at least 80% of the samples. Although the detection limits of Ag for both FOREGS and IGGE are sufficient to provide reportable values, a large bias was found between the two datasets. This study demonstrates that consistent analytical data for certain elements of global geochemical mapping samples can be achieved by different qualified laboratories, such as China’s IGGE laboratory and some European laboratories. For some elements, such as Ag, further research on the selection of the proper analytical methods and on the development of quality control methods should be undertakendwith final recommendations adhered to by all participants of the global geochemical mapping program.     

LITHOLOGIC OIL RESERVOIR OF ES_3 IN LUOJIA AREA IN ZHANHUA SAG

1.IntroductionTheLuojiaareaisinthesouthZhanhuasagofnorthJiyangdepression,andtheareaofLuojianosestrUctUreis250kmZ(Fig.l).ThesouthpartisChenilavillageuplift,tothenorthpartissouthfaultofBonan,tothewestpartisLuoxifaultzone,andtotheeastpartiswestKenxiuplift.Thereare122wildcatssinceitwasdrilledinlate1960s.Thereare10oil-bearingserieshavebeenfound,theyareCambrian-Ordovician,Permo-carboniferous,Mesozoic,Kongdianformation,fourmembersofShahejieformation,Dongyingfonnation,GUantaoformation,theprov…     

Geochemical and Environmental Evaluation of Um Shashoba Gold Mine Area,Southeastern Desert,Egypt

A suite of elements(Ag,Au,Ba,Bi,Cd,Co,Cr,Cu,Ga,Hf,Hg,Mn,Mo,Ni,Pb,Rb,Sb,Se, Sr,Te and Zn),total organic carbon(TOC)and pH were analyzed in stream sediment and tailing samples from Um Shashoba area,in order to evaluate Au placer and the sediments being impacted by old mining activities.Analytical results were examined using statistical,graphical and mapping methods.In spite of the results revealing that Au and most of the elements in sediments were in general significantly lower than those in tailing,Au wa...     

中国几个主要煤产地煤中微量元素特征

采用原煤直接溶样和使用ＩＣＰ－ＭＳ方法对我国平朔,大同,六盘水和唐山几个主要煤产地煤的微是元素进行了检测,报道了这几个主要煤产地煤中５１种微量元素含量,并对基含量特征进行了讨论,研究表明,与海水有关的过渡相沉积环境中的煤的Ｌｉ,Ｂｅ,Ｓｃ,Ｔｉ,Ｖ,Ｚｎ,Ｃｕ,Ｇａ,Ａｓ,Ｓｅ,Ｙ,Ｚｒ,Ｓｎ,Ｐｂ,Ｔｈ,Ｕ和稀土元素含量相对较高,内陆湖泊沉积环境中的煤的微量元素含量相对较低。     

滇西北香格里拉市红牛—红山铜矿勘查系统模型

滇西北红牛—红山铜矿床是义敦—沙鲁里岛弧上与晚白垩纪中酸性侵入体有关的典型的斑岩-矽卡岩-热液型铜矿床。本文通过对其成矿地质背景、矿床地质特征、矿化富集规律及成矿模式、矿床地球物理和地球化学特征的综合研究，建立了红牛—红山铜矿床的"大比例尺地质填图和综合研究+重力+激电和高精度磁测+土壤化探测+工程验证"组合勘查技术方法、"燕山晚期石英二长斑岩+接触带矽卡岩和层间破碎带矽卡岩+重力低异常+高磁异常+高视极化率和低视电阻率异常+Cu-Mo-Pb-Zn-Ag-Au等元素综合异常"组合勘查模型。地质调查研究确定矿床成矿地质体和找矿地质体、矿化类型及其空间分布规律，建立矿床"四位一体"的成矿模式和区域-矿区地质找矿模型。区域中小比例尺的土壤化探测量确定区域找矿靶区，大比例尺土壤化探测量进一步缩小找矿靶区，逼近矿体赋存部位。矿区处于1∶5万土壤测量圈定的Cu-Pb-Zn-Mo-Au-Ag元素综合高异常区，1∶2.5万土壤测量圈出Cu-Pb-Zn-Ag-W元素综合异常面积较大、强度高、浓集中心明显、元素套合好，与矿区铜（铁）矿体赋存区域异常相对应。区域重力低异常区和正磁异常强度高区域是重要的找矿靶区，矿区大比例尺磁异常和激电异常区确定了矿体的空间位置和产状；矿区铜（铁）矿体赋存区为低视电阻率、高视极化率异常区，高精度磁测表现为正负磁异常相伴。矿区地质-地球化学-地球物理综合勘查模型对矿区深边部找矿起到重要的指导作用。     

庐枞地区1:5万综合物化探调查的初步应用

庐江—枞阳地区是长江中、下游铁铜成矿带的重要组成部分,近年来开展了1:5万综合物化探调查,提供了丰富的地质信息,为普查找矿提供了重要的线索。本文侧重介绍该区综合物化探调查在解决基础地质问题方面的应用。     

小热泉子铜矿床物化探找矿效果及综合找矿模式

对小热泉子铜矿进行了一系列物探找矿方法的试验研究工作,其中包括：重力、井中充电激发极化法、高精度磁测、地－井方式激发极化法、甚低频电磁法、瞬变电磁法、天然电磁场测深、可控源音频电磁法、分布式被动源陈列电磁法及中间梯度激发极化法等。仅钻孔原生晕取得一定的地质效果。     

湖南清水塘铅锌矿区物化探异常特征

湖南清水塘铅锌矿位于邵阳—郴州断裂带上,是典型的中低温热液充填脉状铅锌矿床。矿体呈网脉状、脉状、透镜状赋存于硅化破碎带中,赋矿围岩为寒武、奥陶系板岩。在该区开展了地面高精度磁法、激电中梯测量以及土壤地球化学测量等工作,对物化探异常特征进行综合研究,总结物化探找矿标志。结果表明,中高值磁异常结合激电中梯异常特征可有效推断断裂构造位置,铅锌矿体呈低阻高视幅频率的异常特征,Pb、Zn地球化学异常是该区铅锌矿体最主要的找矿标志。经工程查证,在异常区均发现了铅锌矿体,进一步证明物化探方法在清水塘铅锌矿区的应用效果较好,为矿区下一步找矿指明了方向,对于同类型矿床的找矿具有一定的参考价值。     

喀拉通克铜镍矿物化探方法的应用效果

在1:20万航空磁测中仅发现小而弱的磁异常,在地表发现了铁帽,并在铁帽下发现了铜矿化的基性岩后,通过地表磁测,发现磁异常,经钻探发现了致密块状铜镍矿.选用重力、磁测、激发极化法及化探土壤测量等方法进行工作,获得明显的综合异常,指导了钻探工程的正确部署,钻到了工业矿体.     

综合物探在新疆1∶50000矿产普查中的应用

为了在新疆1∶50000矿产普查中研究成矿地质条件圈定成矿远景区域,在普查过程中通过重、磁、电等多种物探手段的综合应用,来探测深部和隐伏矿,效果明显。通过采集标本对其工作区的物性特征加以归纳分析,指导物探方法(重、磁、激电)的运用,为后续开展物探工作提供借鉴。首先在工作区利用重力和航磁资料,查明勘探区内地质构造特征及岩体分布规律,得到重、磁高值异常区多与岩体、岩体接触带及断裂带有关,而该区域的成矿与接触带或断裂构造密切相关,在接触带及断裂构造带上有利于硫化物发育,再利用大功率激发极化法的低阻高极化特征圈定含硫化物的有利区域,最后优选重、磁、电综合物探异常特征明显、成矿部位有利地段,并结合地质、化探异常特征对工作区定性的综合评价,指导寻找含硫化物的岩(矿)体,最终圈定找矿靶区一处,为矿产普查工作提供基础资料和找矿依据。     

铀成矿区域物(化)探判据的初步探讨和应用

本文研究和分析了川北砂岩和康滇地轴几个铀矿床和矿化地段的各种地球物理场分布特征与铀矿化的关系,及其反映的铀成矿可能性。充分利用和分析研究工作区现有的大量放射性测量及航磁、重力测量资料,总结和建立铀成矿的区域物(化)探判据:高变异、剩余值、零值线、过渡带、富铀体、复合晕。利用成矿判据在区域和矿区成矿预测中划分成矿有利区、段,为区域找矿和矿床扩大提供了可靠的依据。     

中国东南部内生成矿区的地球物理特征和深部构造

本文目的是为了有助于讨论中国东南部的地球物理场、深部构造、花岗岩类的成矿专属性及其与内生矿化的关系。应用深地震测深和重力异常建立的地壳与上地幔模型是划分地壳类型和成矿预测的基础。莫霍面深度和地壳不均匀性是划分区域成矿带的主要准则。区域重力异常的模拟和解释肯定了W-Sn成矿与莫霍面坳陷和岩石圈中低密度带的关系,以及Cu—Fe、Pb-Zn成矿带与莫霍面隆起和陡坡带的关系的观点的有效性。还注意到了成矿区与局部重磁异常、侵入体的化学成分、以及不同方向深断裂的关系。根据岩石磁性和岩石化学参数确定了花岗岩类的成矿专属性。应用重力模拟确定了花岗岩类的三维地下形态和内部结构,这有利于提供深部找矿线索和研究侵入体的含矿性。中国东南部获得的资料证明了应用重磁场研究地壳构造、岩浆岩、成矿预测的效果和前景。     

赫章营盘铅锌矿区地球物理、地球化学特征及异常含矿性研究

对营盘铅锌矿区的地球物理、地球化学特征进行了系统总结，研究结果表明：物化探异常与F1含矿断裂及铅锌矿体产出呈明显的藕合关系，藕合关系强弱主要受矿体埋深、剥蚀程度制约，藕合程度低的弱异常具有较好的找矿前景，也是今后重点评价对象。     

成都市区域化探深层样品元素异常与物探重、磁异常及遥感解译构造的关系

通过深层样化探异常与物探重力、航磁和遥感解译关系的研究,认为深层样元素异常是由隐伏构造指示元素Au、Hg,与重力负异常有关的酸性岩元素Sn、Be、F、Y,与航磁正异常有关的基性岩元素Fe、Co、Ni、V、Cr和与地层有关元素Cd、C、Tl四部分组成;解释了深层样元素异常的原因,开拓出区域化探与区域物探、遥感解译相结合的新路。