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1.
西藏松多地区位于冈底斯-念青唐古拉中生代、新生代铜钼金铁成矿带中的昂仁-南木林铁铜钼多金属成矿带。1/5万水系沉积物扫面成果显示,该区是铜、铅、锌、银、钨、钼等矿产的有利成矿区。依据元素相关性、空间分布特征和主要指示元素种类,划分出Cu-Pb-Zn-Ag-Sn元素组合、Cu-Au-W-Pb-Zn-Ag-Cd元素组合及Cu-Zn-Sn为主的元素组合等3个组合类型,并指出了元素组合异常内寻找的矿种和矿床类型,即铜多金属斑岩型、构造热液型。通过异常查证,发现了果夏弄铜铅锌多金属矿点及果夏弄南铜矿点等多处矿点,找矿成果明显,为该区找矿指明了方向。 相似文献
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根据休宁地区1∶20万区域化探资料,计算了区内元素的背景值、区域浓集系数,探索了区内元素空间分布与成矿元素共生组合关系;用区域浓集系数对该地区32种元素的成矿潜力进行排序,在省内主攻矿种中,该区的成矿潜力依次为金(银)-钨-钼-铜-锌-铅;根据成矿控矿因素分析,预测了区内找矿有利地段。 相似文献
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西藏春哲地区位于冈底斯—念青唐古拉成矿带中的青都—则学铁铜多金属次级成矿带南部,具有较好的找矿前景。1∶5万水系沉积物测量结果显示,该区是铅、锌、银、钨、钼等矿产的有利成矿区。依据元素相关性、空间分布特征和主要指示元素种类,划分出以Pb、Zn、Cd、Ag元素为主、以W、Mo、Bi元素为主和以As、Sb元素为主的3类元素组合异常,并指出了各类组合异常内寻找的矿种和矿床类型,即矽卡岩型铁铜多金属矿和构造热液型铅锌矿。通过异常查证,发现了恰我铁钨多金属矿、勒翁铁多金属矿等2个中型矿床和多处矿点,找矿成果显著。其中,恰我铁钨共生矿为区域内首次发现的新类型矿产,对该区找矿具有较好的指导意义,亦显示研究区具有较好的找矿潜力。 相似文献
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对内蒙古陶来托钼多金属勘查区进行地质、地球物理、地球化学综合找矿信息的提取来评价矿区找矿潜力。结果表明,陶来托钼多金属矿是一个以斑岩型钼矿为主的勘查区,发现了斑岩型钼矿床及多处热液脉型铅锌银矿(化)点。成矿岩体为早白垩世花岗斑岩,控矿构造为北东-北北东向断裂。斑岩型钼矿化区与环状激电异常和环状磁异常对应性较好,显示出中低视极化率异常为矿致异常的特征。1∶5万化探异常元素由钼矿化区至铅锌银矿化区表现出Mo、W—Ag、Pb、Zn的侧向分带特征。根据综合找矿信息提取及斑岩型矿床成矿系列建立,指出区内钼矿找矿潜力较大,并预测钼矿区北西侧为热液脉型铅锌银矿的成矿有利地段。 相似文献
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为了研究成矿元素地球化学异常,在山东胶东牟平—文登地区,开展了-60目粒级的1∶5万水系沉积物测量,对水系沉积物中元素含量分布、综合异常特征、相关性及异常元素组合特征进行了研究,在研究区圈定综合异常72处,结果发现:研究区内Au、Ag、Cu、Pb、Zn、Mo的异常规模大,异常多分布在断裂构造中,地质及地球化学条件优越,具有较大的成矿潜力,结合区域构造成矿特征揭示水系沉积物和主要地质体中地球化学异常分布及其成因联系。依据综合异常特征和地质信息圈定3处找矿远景区。初村王家泊子和汤村店子金找矿远景区是寻找石英脉型、破碎带型金矿的有利地段,构造发育,且有多期次活动特征,地表可见褐铁矿化、硅化等,异常元素元素组合齐全、强度高、浓集中心明显;解家庄金铅找矿远景区。 相似文献
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内蒙古阿巴嘎旗必鲁甘干钼铜多金属矿床地质特征及找矿前景 总被引：1，自引：0，他引：1
内蒙古自治区阿巴嘎旗必鲁甘干钼铜矿床,是内蒙古二连-东乌旗成矿带上近几年新发现的一个中型斑岩型矿床,矿体主要赋存于二长花岗斑岩及二叠系沉积地层中.化探工作发现,成矿元素Ag、Pb、Zn、Cu、Mo、W异常形态复杂,存在多个浓集中心,总体呈NE向展布,各元素异常浓度中心吻合,元素间套合良好.矿体形成与硅化、钾化、绢英岩化等蚀变有关,成矿与构造、岩浆活动、成矿热液活动关系密切.本文在总结该矿床的地质与化探特征基础上提出其成矿规律,为本区下一步找矿提供借鉴. 相似文献
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西藏纳个丁日矿区位于班怒结合带内，属于班公湖—怒江成矿带中西段。矿体赋存于早白垩世中酸性岩裂隙带及其侵入接触带和围岩滑脱裂隙中。区内化探异常发育，元素组合有利，各元素套合较好，主成矿元素具有三级水系沉积物异常，浓集中心明显。发现多个地表矿（化）体，其中最高Cu品位达9.17%、Au品位1.21g/t。近年来，班怒成矿带陆续发现了多布杂、青草山等大型-超大型矿床，其主要分布于班怒结合带两侧陆内弧上，而纳个丁日矿区位于结合带内，具备优越的成矿地质条件和较大的找矿潜力。 相似文献
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吉拉铜金矿位于冈底斯成矿带中段南缘,谢通门铜金富铁矿集区,与著名的雄村特大型铜金矿毗邻,成矿条件优越,化探异常显示Cu、Au、Pb、Zn、Ag元素标准差、变化系数大,富集能力强,元素套叠好,异常浓集中心突出,浓集中心与矿化（体）相对应,属典型的致矿异常,矿（化）体分布与大理岩和闪长岩接触带上。建议应以冈底斯成矿带铜多金属矿成矿找矿模式及雄村矿床的发现经验来指导找矿,继续加强勘查和研究工作,将有望实现斑岩型、矽卡岩型铜多金属矿,韧性剪切带型、蚀变岩性金铜矿的重大找矿突破。 相似文献
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《物探与化探》2015,(4)
总结了胡家店地区的地质特征,并对该区1∶1万土壤地球化学测量元素含量特征及元素组合特征进行了细致研究,认为该区Au、Ag、Cu、Pb、As、Mo、Hg等地球化学异常显示明显,其中Au、Ag、Cu、Mo是找寻金矿的土壤地球化学指示元素。Au、Ag、Cu、Mo异常强度大、分带好、浓集中心和峰值明显,异常范围受测区内张性构造破碎带及闪长玢岩小岩株或小岩脉等控制。在该区圈定出H-1~H-8八处组合异常,其中H-1~H-4四处组合异常的地质成矿条件优越,各单元素异常内带规模大、强度高,浓集中心和峰值明显,异常叠合程度好,Au、Cu异常浓集中心较吻合,具较好的金矿找矿前景。对H-1组合异常开展了槽探查证工作,新发现2条金矿脉,平均品位(2.03~2.37)×10-6。结合测区地质成矿条件和土壤地球化学异常特征,初步总结了胡家店地区金矿找矿标志,并圈定出测区西北部西寨山—龙宫山一带为金矿找矿靶区,为该区进一步找矿提供指导。 相似文献
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A short period three component seismic system was operated for a period of more than 1000 hrs (distributed over five intervals) at the Badra area, east central Iraq, during the period November 1975–March 1976.
A short review is given of the analyses of the seismograms, such as rate of occurrence of microearthquakes, statistical analysis and spectral analysis of selected events. 相似文献
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R.D. Lawrence R.S. Yeats S.H. Khan A.M. Subhani D. Bonelli 《Journal of Structural Geology》1981,3(4):449-457
During the Cretaceous an andesitic arc developed across south Asia facing the Tethys Ocean. Remnants of this arc are preserved in Iran, Afghanistan, and the Chagai Hills and Kohistan, Pakistan. West of the Chaman fault near Spinatizha, Pakistan (33° 33′N, 66° 23′E) a terrain of crystalline rocks is exposed that links the Chagai Hills portion of this arc with the Kandahar portion of it in Afghanistan. Four units are present. (1) The Spinatizha Metamorphic Complex includes orthogneiss, greenschist, amphibolite, metavolcanics, marble and foliated muscovite granite. Extreme variation in rock type and degree of metamorphism characterises the entire complex. It is the oldest unit west of the Chaman fault in Pakistan. (2) The Bazai Ghar Volcanics consist of weakly deformed tuffs, flow breccias, and other coarse-grained pyroclastics of andesitic-arc type. Andesite flows and at least one silicic welded tuff are also present. The Bazai Ghar Volcanics are everywhere separated from the Spinatizha Metamorphic unit by granitic intrusions and a major fault. (3) Both the above units are intruded by a series of calc-alkaline granitic plutons ranging from diorite to granite. The silicic plutons generally intrude the more mafic ones. The Bazai Ghar Volcanics and related intrusions are probably equivalent to the Cretaceous (?) Sinjrani volcanics and the Cretaceous and younger intrusions of the Chagai Hills. (4) Along the fault zone between the volcanic and metamorphic rocks is a small area of previously unknown clastic sedimentary rocks: conglomerates and slates. The unit is of Palaeogene age but cannot yet be correlated with known units. The Spinatizha crystalline terrain extends south along the Chaman fault into Afghanistan and is covered by the Helmund desert to the west. It is the eastern continuation of the calc-alkaline arc terrain of the Chagai Hills dragged by oroclinal flexing into the Chaman transform zone. To the north it connects with the Kandahar volcanic arc. The metamorphic complex may represent the basement on which the arc terrain rests, only exposed due to strong vertical uplift near the Chaman fault. 相似文献
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西藏改则地区的石炭系 总被引：1，自引：0，他引：1
<正> 关于西藏班公湖—怒江断裂带以北的石炭系,东部(温泉幅)有马查拉组(文世宣等,1984),西部(日土幅)也曾发现过下统和上统(Norin 1946;文世宣等1984),中部的改则地区,王文彬等(1957)于北纬32°30′和东经87°附近的影拉、门斗山一带,发现了厚约 相似文献
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The stratigraphy of the highly deformed and overthrust supracrustal rocks of the Akjoujt area consists of two sequences separated by an angular unconformity. A new stratigraphic framework has been proposed that is virtually the reverse of previously published schemes. The oldest recognisable supracrustal sequence consists of metabasalts overlain by banded iron formations and semipelitic and quartz-rich metasedimentary schists, for which the name Eizzene group has been proposed. This is overlain with angular unconformity by orthoquartzite followed by a suite of siliciclastic rocks, mafic to felsic volcaniclastic rocks, flows and banded iron formations. This well-layered sequence is overlain by poorly layered monotonous submarine metabasalts and coeval dolerites. All the rocks above the unconformity have been assigned to the newly created Oumachoueı̈ma group. The supracrustal rocks of the Akjoujt area are preserved as a complex system of overlapping thrust sheets, representing the disjointed limbs of a large-scale recumbent syncline. Igneous and metamorphic basement, with basal Oumachoueı̈ma group metasedimentary rocks attached, has been overthrust and is preserved in synformal remnants within the supracrustal domain. These are the erosional remnants of refolding by later, upright events. The main tectonic episodes consisted essentially of two periods of thrusting and recumbent folding followed by two episodes of thin-skinned upright folding above the sole thrust. Overthrusting of the suite onto the Archaean Amsaga basement to the northeast along the sole thrust is believed to be a late-stage event. The idiosyncratic Fe–Cu–Au–Mg carbonate mineralisation style of the Akjoujt area shows evidence of having been generated more than once during the evolution of the host rocks. Starting with pre to syn-early thrusting events, the carbonate-rich mineralisation recurred at least until the upright folding. There is strong field evidence for a genetic link to carbonate-rich iron formations by remobilisation, but no evidence of a synvolcanic or synsedimentary mineralising event. 相似文献
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通过对桦甸市腰（土仓）子690铁矿矿区水文地质特征的分析，阐明了矿区的水文地质条件，确定了未来矿床开采技术条件。 相似文献
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四川九寨沟地区黄土的初步研究 总被引：1，自引：0，他引：1
九寨沟地区的黄土孤立产出于海拔2300～2800m的洼地中,其内含古风化界面.通过对黄土的物质成分、结构、扫描电镜形貌、孢粉、ESR测年等分析测试,确定其为冰缘黄土,划分了九寨沟地区更新世冰期. 相似文献
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江西乐平早二叠世地层朱相水（江西师范大学地理系，江西南昌，３３００２７）关键词地层，早二叠世，栖霞期，乐平，江西实测剖面位于江西乐平沿沟煤矿矿区东隅，３ｋｍ无甲村附近，早Ｍ叠世地层发育于象鼻山与鲤鱼山之间。剖面系笔者与乐平矿务局沿沟煤矿的姚克敏、徐光... 相似文献
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An exploratory investigation was conducted to assess the present conditions and evaluate the potential impacts of mining activities on soil and water environments at the Shivee-Ovoo coalmine area in Mongolia. Water quality analysis was conducted on samples from mine dewatering boreholes, a tailings dam, and drinking water sources around the mine area. In drinking water supplies of the area, concentrations of Mg, Fe, and F exceeded the levels set in Mongolian and World Health Organization guidelines. Water type and the principal components analysis indicated that water from the mine area and from public water-supply wells originated from the same aquifer. However, the water quality differed in shallow wells and deep wells because of bedrock differences and geochemical weathering processes, rather than climate effects such as from evaporation. The discharged water poses medium to high salinity hazard for use in irrigation, suggesting the need to manage its use in sustainable agriculture or projects to prevent desertification. The particle size distribution and fractal dimension values of soils revealed the dominance of fine to medium sands, which have strong potential for desertification. X-ray photoelectron spectroscopy analysis showed that the soils currently pose no apparent threat for acid rock drainage. Consequently, the open-pit mining of the study area shows no obvious environmental impact at present in its vicinity. However, for sustainable development and expansion of the mine, environmental changes should be continuously monitored, with consideration of possible measures for waste recycling. 相似文献