共查询到20条相似文献，搜索用时 46 毫秒
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<正>1研究目的（Objective）东秦岭洛南高耀—丹凤—商南地区是中国重要伟晶岩区之一,前期找矿工作主要围绕伟晶岩型铀矿和锂铍铌钽铷等稀有金属矿,发现了一系列矿床（点）,构成了重要的商州—丹凤伟晶岩型铀矿集区。陕西高耀—河南官坡一带伟晶岩区分布有规模大、强度高的锡化探异常以及锡石自然重砂异常。近年来,陕西省矿产地质调查中心在商洛市庾岭—峦庄一带,针对伟晶岩脉、锡化探异常及锡石自然重砂异常,开展以锡为主的关键矿产调查评价,在洛南县高耀镇发现了伟晶岩型锂铍锡钽矿点（图1）,填补了陕西省锡矿空白,对区内进一步开展伟晶岩型锡及稀有金属找矿工作具有重要意义。 相似文献
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为探究不同类型锡矿床所反映出的自然重砂矿物组合特征,统计了云南、福建、江西、浙江、湖南、青海和广西7省共35个典型锡矿床的自然重砂情况,通过计算和分析各自然重砂矿物在所对应类型矿床中的报出频率,得出矽卡岩型、热液脉型和斑岩型3种锡矿所对应的自然重砂矿物组合。所反映出的重砂矿物组合既有相似之处,如均出现锡石+白钨矿(或黑钨矿)的矿物组合,亦反映出不相同的地方,如矽卡岩型锡矿石榴子石报出率高,斑岩型锡矿锆石报出率高等。因此,按照矿床类型建立的自然重砂矿物组合对于建立自然重砂找矿模型具有重要意义。 相似文献
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为明确找矿方向,实现找矿突破,在坤得来扎拉格地区开展了1∶10 000土壤地球化学测量和自然重砂测量,对土壤中W、Sn、Pb、Zn等10种元素的地球化学特征和自然重砂的重矿物特征进行了初步总结。利用相关分析对元素的共生组合关系进行了研究,显示区内地球化学元素组合为Pb-Zn-Ag-Cu和Sn-W-Mo-Bi,其中Sn富集分异最为强烈,Sn含量峰值大于300×10-6。通过自然重砂测量查明了矿区内有锡石、石榴子石、钛铁矿、锆石等23种重矿物,并通过重矿物组合特征、锡石延伸系数和地质特征初步查明了矿区锡多金属矿的成因为热液脉型。最终结合元素地球化学特征、锡石分布组合特征和异常区内已发现的矿化线索,优选出了坤得来扎拉格Sn-W多金属找矿预测区和坤得来扎拉格南Pb-Zn-Ag-Cu-Sn多金属找矿预测区。 相似文献
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江苏宁芜北段自然重砂异常特征及其对铜金矿的响应 总被引：2，自引：0，他引：2
宁芜火山岩盆地是长江中下游成矿带中重要的铁、硫、铜、金成矿区。基于宁芜北段自然重砂建库数据,通过ZSAPS2.0软件GIS平台,选择与火山热液充填型铜金矿相关的特征矿物,圈定了自然重砂组合异常。通过自然重砂组合异常特征发现,铜矿物(黄铜矿、斑铜矿、蓝铜矿、辉铜矿、孔雀石)、自然金、黄铁矿、重晶石等重矿物组合对火山热液充填型铜金矿响应明显。在组合异常的基础上,圈定自然重砂综合异常,以成矿地质条件、与已知矿床的对应关系、异常强度、异常规模、重砂异常套合程度等为指标,对综合异常进行评价,从而为宁芜火山岩盆地北段铜金矿找矿远景区的划定提供依据。 相似文献
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粤北地区锡矿主要有石英脉带型锡矿、矽卡岩型锡矿、矽卡岩-破碎带复合型锡矿、脉状锡铅锌多金属矿、花岗岩风化壳型锡矿、云英岩型锡矿和砂锡矿等类型。根据区域成矿地质和物化探异常等特征,认为粤北地区石英脉型锡矿与矽卡岩-破碎带复合型锡矿具有良好的找矿前景,前者可作为今后该区域锡矿的主要找矿类型。根据区域成矿地质特征划分为5个找矿远景区,即锯板坑—瑶岭找矿远景区、杉木洞—禾尚田找矿远景区、大东山找矿远景区、岭脚找矿远景区、谢家山找矿远景区。 相似文献
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一、前言云南地跨华南褶皱系、扬子准地台、三江褶皱系以及松潘-甘孜褶皱系和冈底斯-念青唐古拉褶皱系五个大地构造单元,各构造单元内与锡矿有关的花岗岩分布广泛。过去除个旧锡矿外,其它地区较少发现锡矿,近几年根据锡石自然重砂异常发现了许多新的锡矿床(点)。在1:20万区 相似文献
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牛屎坡砂锡矿是个旧西区最大的砂锡矿床.弄清砂矿的物质来源,不仅对揭示砂锡矿的成因,而且对指导深部找矿评价,都有现实意义. 从1973年起,笔者曾对砂矿、蚀变花岗岩、电气石细脉、氧化矿及围岩进行了野外和室内研究工作.下面着重讨论应用锡石标型特征研究砂锡矿物质来源所取得的初步成果. 矿区地质概况 相似文献
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《华南地质与矿产》2018,(2)
上宫-吉家洼矿集区位于河南省西部的熊耳山地区,区内发育上宫、干树、吉家洼等金矿床,是河南省重要的黄金产地。在充分收集、整理矿集区地质、矿产、物探、化探、重砂、遥感等资料的基础上,总结矿集区的金矿成矿规律并建立了找矿模型。提取和构置断裂构造、剩余布格重力异常、Au化探异常、Ag化探异常、Cu化探异常、Pb化探异常、Mo化探异常、重砂异常、燕山期花岗岩体等9个预测要素作为证据因子,基于MRAS证据权重法进行了成矿预测并圈定18个最小预测区。依据后验概率和找矿标志将最小预测区分为1级、2级和3级,针对不同的级别提出了相应的勘查建议,为矿集区下一步的找矿工作指明了方向。 相似文献
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Inter-regional correlation of transgressions and regressions in the Cretaceous period 总被引：1，自引：0，他引：1
T. Matsumoto 《Cretaceous Research》1980,1(4):359-373
Well investigated platforms have been selected in each continent, and the history of Cretaceous transgressions and regressions there is concisely reviewed from the available evidence. The factual records have been summarized into a diagram and the timing of the events correlated between distant as well as adjoining areas.On a global scale, major transgressions were stepwise enlarged in space and time from the Neocomian, via Aptian-Albian, to the Late Cretaceous, and the post-Cretaceous regression was very remarkable. Minor cycles of transgression-regression were not always synchronous between different areas. Some of them were, however, nearly synchronous between the areas facing the same ocean.Tectono-eustasy may have been the main cause of the phenomena of transgression-regression, but certain kinds of other tectonic movements which affected even the so-called stable platforms were also responsible for the phenomena. The combined effects of various causes may have been unusual in the Cretaceous, since it was a period of global tectonic activity. The slowing down of this activity followed by readjustments may have been the cause of the global regression at the end of the Cretaceous. 相似文献
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The Afyon stratovolcano exhibits lamprophyric rocks, emplaced as hydrovolcanic products, aphanitic lava flows and dyke intrusions, during the final stages of volcanic activity. Most of the Afyon volcanics belong to the silica-saturated alkaline suite, as potassic trachyandesites and trachytes, while the products of the latest activity are lamproitic lamprophyres (jumillite, orendite, verite, fitztroyite) and alkaline lamprophyres (campto-sannaite, sannaite, hyalo-monchiquite, analcime–monchiquite). Afyon lamprophyres exhibit LILE and Zr enrichments, related to mantle metasomatism. 相似文献
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正20140876 Gao Junbo(College of Resources and Environmental Engineering,Guizhou University,Guiyang 550025,China);Yang Ruidong Study on the Strontium Isotopic Composition of Large Devonian Barite Deposits from Zhenning,Guizhou Province(Geochimica, 相似文献
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正20141470 Chai Lu(Shenyang Institute of Geology and Mineral Resources,CGS,Shenyang110034,China);Zhu Qun Distribution of Significant Metal Mineral Resources the in Adjacent Areas of China,Russia and Mongolia(Geology and Resources,ISSN1671-1947,CN21-1458/P,22(5),2013,p.397-402,2 illus.,3 tables,20 refs.)Key words:metal ores,China,Russia,Mongolia 相似文献
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正20141944Bao Hanyong(Research Institute of Exploration and Development,Jianghan Oilfield,SINOPEC,Wuhan 430223,China);Guo Zhanfeng Tectonic-Thermal Evolution of the Subei Basin since the Late Cretaceous(Geological Journal of China Universities,ISSN1006-7493,CN32-1440/P,19(4), 相似文献
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正20140692 Duo Tianhui(No.402 Geological Team,Exploration of Geology and Mineral Resources of Sichuan Authority,Chengdu611730,China);Wang Yongli Computer Simulation of Neptunium Existing Forms in the Groundwater(Computing Techniques for Geophysical and Geochemical Exploration,ISSN1001-1749,CN51-1242/P,35(3), 相似文献
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正20142512Chen Xiaoan(Jiangxi Provincial Research Institute of Soil and Water Conservation,Nanchang 330029,China);Yang Jie Distribution Characteristics and Causes of Collapse Erosion(Journal of Mountain Research,ISSN1008-2786,CN51-1516/P,31(6),2013,p.716-722,2illus.,7tables,14refs.) 相似文献
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正20140644Cao Ying(Earthquake Administration of Yunnan Province,Kunming 650224,China);Wu Xiaoping Research on Structural Stress Field Basing on Focal Mechanism Solutions Data in Sichuan-Yunan Area(Journal of Seismological Research,ISSN1000-0666,CN53-1062/P,36(2),2013,p.165-172,6illus.,2tables,16refs.) 相似文献
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正20140806Cai Jinhui(Wuhan Center of China Geological Survey,Wuhan 420205,China);Wei Changshan Zircon U-Pb Ages of Magmatic Rocks of Dabaoshan Molybdenum-Polymetallic Deposit,Guangdong Province(Geolo- 相似文献
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正20141251Ban Junsheng(Central Laboratory,Second Geological Team,Henan Provincial Non-Ferrous Metals Geological and Mineral Resources Bureau,Pingdingshan 467021,China);Ren Jinxin Determination of the Magnetic Material Composition in Magnetite Ore 相似文献