共查询到20条相似文献，搜索用时 78 毫秒
1.
通过在西昆仑黑恰—三十里营房地区开展1∶5万水系沉积物扫面、大比例尺矿产地质填图、地质-物探-化探综合剖面测量及槽探等工作,在查明地质特征、成矿类型及成矿规律的基础上,评价该区矿产资源潜力。结果表明: 研究区主要有黑恰海底喷流沉积(改造)型铁多金属矿、阿克塔河南海相沉积型含钛铁矿及阿克塔河北层控型铜金矿3种成矿类型; 划分了7处成矿预测区,其中A类预测区1个,B类预测区1个,C类预测区5个; 铁矿石预测资源量为1 565.69万t,锰矿石预测资源量为39.73万t,铜金属预测资源量为0.35万t,铅金属预测资源量为1.33万t,锌金属预测资源量为2.58万t,钛金属预测资源量为14.76万t; 圈定了5处找矿靶区,其中A类找矿靶区2处,B类找矿靶区3处; 建议进一步对黑恰铁多金属成矿带开展Fe、Pb、Zn找矿工作,扩大找矿成果; 首次在阿克塔河南早石炭世帕斯群发现海相沉积型含钛铁矿矿体,有望取得重大找矿突破。 相似文献
2.
柞水-山阳金铜银多金属矿集区成矿条件优越,找矿潜力较大,区内可划分出与晚侏罗世—早白垩世构造-岩浆热液活动相关的金、铜、银、铁、铅、锌、锑成矿亚系列,与晚三叠世中酸性岩浆活动相关的钼、钨成矿亚系列,与泥盆纪热水喷流沉积作用相关的碳酸盐岩容矿的铜、铁、铅、锌、银成矿亚系列等5个。归纳总结了矿集区金铜银多金属矿床找矿标志,分别建立了夏家店金矿床、池沟铜钼矿床、银洞子银铅多金属矿床、龙头沟金矿床、王家坪金矿床的综合找矿模型。通过区内综合找矿方法、找矿模型的具体运用,进行找矿预测,取得了较好的找矿进展。在圈定的夏家店和风沟-西田家沟2个找矿靶区预测金资源量42 t、银资源量450 t、铅资源量4×104t。提出了研究区金铜银多金属矿床找矿预查选区、普查评价和详查勘探3个阶段不同的找矿方法技术组合,为研究区进一步的找矿工作提供了参考模型和方法依据。 相似文献
3.
雄村铜金矿集区位于南拉萨地块南缘的冈底斯斑岩铜矿带,资源潜力大(仅查明的铜金属资源量超过250万吨、伴生金金属资源量超过250吨、伴生银金属资源量超过1 100吨)、成矿地质背景特殊。通过对雄村矿集区的勘查和研究成果的系统分析,本文从矿床地质特征、地球物理特征、地球化学特征、遥感特征等四个方面进行了详细的归纳总结,分析了各类成矿要素的特征及内在联系。以找矿勘查为宗旨,扩大资源量为目的,建立了综合信息找矿模型。找矿模型显示,早、中侏罗世含矿斑岩和雄村组凝灰岩是主要的赋矿岩石,钾硅酸盐化、钠化-钙化、黄铁绢英岩化、青磐岩化是主要蚀变类型,Cu-Au-Ag元素地球化学异常是重要的地球化学找矿标志,矿体产出受NW、EW向的断裂构造控制,地面磁测的高磁异常及低磁异常、遥感蚀变异常(钾硅酸盐化蚀变、绢云母化蚀变和地表铁染)及线-线和线-环交切结构是主要的地球物理和遥感找矿标志。利用构建的综合信息找矿模型,在雄村矿集区共圈定出了3个A类找矿靶区(A-1,A-2和A-3),4个B类找矿靶区(B-1,B-2,B-3和B-4)和2个C类找矿靶区(C-1和C-2),并对各找矿靶区进行了评价。 相似文献
4.
查明蚀变和硫化物分带特征是建立斑岩-浅成低温铜金成矿系统的矿床模型与找矿预测的关键。?ukaru Peki铜金矿床是特提斯西段塞尔维亚Timok矿集区近几年新发现的超大型斑岩-浅成低温热液型铜金矿床(上部矿带资源量铜154万吨@2.45%,金86吨@1.37 g/t;下部矿带资源量铜1428万吨@0.83%,金295吨@0.17 g/t),矿体主要产于晚白垩世安山岩中。目前关于该矿床热液蚀变与矿化分带特征及其找矿方向的研究程度相对较低,本文根据钻孔编录信息,利用短波红外(SWIR)光谱技术、光学显微镜和电子探针分析技术,对典型剖面钻孔中的岩矿石样品开展研究,厘定了?ukaru Peki铜金矿床的热液蚀变和金属硫化物分带特征。研究发现该矿床具有垂向分带特征:下部斑岩铜金矿体、中部斑岩-浅成低温过渡铜金矿体和上部高硫型浅成低温热液铜金矿体。矿区热液蚀变分带特征明显,其中斑岩铜金矿体以岩体为中心,由内向外可划分为钾硅酸盐化带、青磐岩化带、绿泥石-白云母带和石英-白云母带,绿泥石-白云母带中的白云母SWIRAl-OH 2200nm吸收峰波长高于石英-白云母带;斑岩向浅成低温过渡铜金矿体发育硬水... 相似文献
5.
矿产资源地球化学模型建立与定量预测研究以成矿成晕地质、地球化学理论为指导,以各尺度勘查地球化学数据为基础,以现代GIS信息技术为手段,通过研究总结典型矿田(矿集区)、矿床的异常特征,建立成矿带内典型矿床地球化学找矿模型,为预测区的地球化学定量预测提供类比依据,从而进行资源量预测。在资源量预测过程中加入了相似度、剥蚀程度、衬值等要素,有效地加大了预测靶区遴选的可信度,通过类比法与面金属量法两种预测方法的加权平均,使预测资源量合理。文章对草河掌—桓仁地区铜矿资源量进行了估算,共新增预测铜资源量21 812.9t。 相似文献
6.
建立地质-地球化学找矿模型
——以西藏甲玛铜多金属矿床为例 总被引：1，自引：0，他引：1
区域地球化学定量预测是全国重要矿产资源潜力评价项目的组成部分之一。为了提高其预测结果的可信度,科学合理的地质-地球化学找矿模型是关键,也是地球化学找矿预测区圈定和资源量估算过程中相似类比的“标准样本”。在中国地球化学找矿模型历史沿革的基础上,提出了地质-地球化学找矿模型建立的基本思路、理论基础和主要内容。通过收集、整理、归纳西藏冈底斯成矿带甲玛“三位一体”（夕卡岩型-角岩型-斑岩型）铜多金属矿床的最新资料,构建了甲玛典型铜多金属矿床的地质-地球化学找矿模型。该模型由区域地质特征、矿床地质特征、矿床地球化学特征、地球化学异常特征、地质-地球化学特征、重要控矿因素6个方面组成。 相似文献
7.
内蒙古自治区已发现的火山岩型铅锌矿(陆相)规模较大,集中分布于大兴安岭地区,与中晚侏罗世火山活动联系密切,已知矿床的深部及外围找矿潜力巨大。依据前人的地质、矿产、物探、化探等资料,采用"火山岩型"预测方法类型,分别以比利亚谷铅锌矿、甲乌拉铅锌矿和扎木钦铅锌矿作为典型矿床,在全区选取比利亚谷、甲乌拉和扎木钦3个预测工作区进行矿产预测。圈定铅锌矿最小预测区109个,其中A级最小预测区18个,B级最小预测区37个,C级最小预测区54个。预测334-1级别Pb+Zn总资源量1732548t,334-2级别Pb+Zn总资源量588930t,334-3级别Pb+Zn总资源量4608682t。可利用的Pb+Zn总资源量为3179267t。反映内蒙古大兴安岭地区中生代火山岩型铅锌矿(陆相)找矿潜力较大。 相似文献
8.
9.
【研究目的】矿产资源定位预测的核心是矿产分布与控矿地质因素之间的非线性关系,大数据及机器学习技术在解决这类复杂非线性关系问题方面已经体现出巨大的优势。小比例尺地物化遥信息的预测数据集具有高维和极不平衡的特点,依靠传统的逻辑假设或统计分析很难适应。本文尝试将随机森林算法引入到小比例尺找矿预测领域来开展研究,探索大数据及机器学习技术在小比例尺找矿预测中的应用。【研究方法】近年来,冈底斯成矿带西段新发现了鲁尔玛、拔拉扎、达若、红山和罗布真等多个斑岩型、浅成低温热液型铜金多金属矿床（点）,证实冈底斯西段具有寻找斑岩型、浅成低温热液型铜金多金属矿的巨大潜力。本文以新发现的典型矿床为研究对象,在总结冈底斯成矿带西段斑岩铜矿成因模式的基础上,结合物化遥综合信息,构建地物化遥综合找矿模型,最后利用随机森林法开展研究区找矿预测。【研究结果】本文结合典型矿床与区域地质、地球物理、地球化学及遥感综合信息,利用随机森林法在冈底斯成矿带西段开展斑岩型、浅成低温热液型铜金多金属矿的找矿预测,圈定出斑岩—浅成低温热液型铜多金属矿找矿远景区11个（包含Ⅰ级远景区2个,Ⅱ级远景区3个,Ⅲ级远景区6个）,其中罗布真、打加... 相似文献
10.
西藏扎囊县克鲁铜金矿找矿远景预测研究 总被引：2，自引：0，他引：2
在总结克鲁铜金矿产出地质背景、矿床地质特征的基础上,探讨了矿床成因,认为该矿床属中高温接触交代矽卡岩型成因为主。通过对矿区地质、地球化学、地球物理特征的分析与研究,对克鲁铜金矿的深部及其外围找矿远景做出了预测,初步认为克鲁铜金矿的深部及西侧找矿潜力大．是寻找隐伏-半隐伏的矽卡岩型或斑岩型铜金矿的重要远景区。 相似文献
11.
Emily Keeble David I. Whiteside Michael J. Benton 《Proceedings of the Geologists' Association. Geologists' Association》2018,129(2):99-119
Pant-y-ffynnon Quarry in South Wales yielded a rich cache of fossils in the early 1950s, including articulated specimens of new species (the small sauropodomorph dinosaur Pantydraco caducus and the crocodylomorph Terrestrisuchus gracilis), but no substantial study of the wider fauna of the Pant-y-ffynnon fissure systems has been published. Here, our overview of existing specimens, a few described but mostly undescribed, as well as freshly processed material, provides a comprehensive picture of the Pant-y-ffynnon palaeo-island of the Late Triassic. This was an island with a relatively impoverished fauna dominated by small clevosaurs (rhynchocephalians), including a new species, Clevosaurus cambrica, described here from a partially articulated specimen and isolated bones. The new species has a dental morphology that is intermediate between the Late Triassic Clevosaurus hudsoni, from Cromhall Quarry to the east, and the younger C. convallis from Pant Quarry to the west, suggesting adaptive radiation of clevosaurs in the palaeo-archipelago. The larger reptiles on the palaeo-island do not exceed 1.5?m in length, including a small carnivorous crocodylomorph, Terrestrisuchus, and a possible example of insular dwarfism in the basal dinosaur Pantydraco. 相似文献
12.
Gilles Serge Odin 《Comptes Rendus Geoscience》2002,334(6):409-414
Lithostratigraphy, physicochemical stratigraphy, biostratigraphy, and geochronology of the 77–70 Ma old series bracketing the Campanian–Maastrichtian boundary have been investigated by 70 experts. For the first time, direct relationships between macro- and microfossils have been established, as well as direct and indirect relationships between chemo-physical and biostratigraphical tools. A combination of criteria for selecting the boundary level, duration estimates, uncertainties on durations and on the location of biohorizons have been considered; new chronostratigraphic units are proposed. The geological site at Tercis is accepted by the Commission on Stratigraphy as the international reference for the stratigraphy of the studied interval. To cite this article: G.S. Odin, C. R. Geoscience 334 (2002) 409–414. 相似文献
13.
The effect of water on accessory phase solubility in subaluminous and peralkaline granitic melts 总被引：4，自引：0，他引：4
The solubilities of columbite, tantalite, wolframite, rutile, zircon and hafnon were determined as a function of the water contents in peralkaline and subaluminous granite melts. All experiments were conducted at 1035 °C and 2 kbar and the water contents of the melts ranged from nominally dry to approximately 6 wt.% H2O. Accessory phase solubilities are not affected by the water content of the peralkaline melt. By contrast, solubilities are affected by the water content of the subaluminous melt, where the solubilities of all the accessory phases examined increase with the water content of the melt, up to 2 wt.% H2O. At higher water contents, solubilities are nearly constant. It can be concluded that water is not an important control of accessory phase solubility, although the water content will affect diffusivities of components in the melt, thus whether or not accessory phases will be present as restite material. The solubility behaviour in the subaluminous and peralkaline melts supports previous spectroscopic studies, which have observed differences in the coordination of high field strength elements in dry vs. wet subaluminous granitic glasses, but not for peralkaline granitic glasses. Lastly, the fact that wolframite solubility increases with increasing water content in the subaluminous melt suggests that tungsten dissolved as a hexavalent species. 相似文献
14.
15.
Muriel Rocher Stéphane Baize Stéphane Jaillet Edward Marc Cushing Yannick Lozac&#x;h Francis Lemeille 《Comptes Rendus Geoscience》2003,335(8):701-708
Calcite samples were extracted both from the rock matrix and the superficial coating of a karstified fault plane of an underground quarry, located in the eastern border of the Paris basin. The karstification is dated as Quaternary. Analysis of mechanical calcite twinning reveals that only the calcite matrix has also undergone a compression trending WNW that can be attributed to the Mio-Pliocene alpine collision. Both coating and matrix have undergone a strike-slip regime with σ1 roughly trending north–south, that could correspond to the regional present-day state of stress, a strike-slip compression rather trending NNW, modified by local phenomena. To cite this article: M. Rocher et al., C. R. Geoscience 335 (2003). 相似文献
16.
正20141520 Bo Ying(Key Laboratory of Metallogeny and Mineral Assessment,MLR,Beijing 100037,China);Liu Chenglin Saline Spring Hydrochemical Characteristics and Indicators for Potassium Exploration in Southwestern and Northern Tarim Basin,Xinjiang(Acta Geoscientica Sinica,ISSN1006-3021,CN11-3474/P,34(5),2013,p.594-602,5 illus.,3 tables,28 refs.) 相似文献
17.
正20141243Chen Ge(Hangzhou Research Institute of Petroleum Geology,PetroChina,Hangzhou 310023,China);Si Chunsong Study on Sedimentary Numerical Simulation Method of Fan Delta Sand Body(Journal of Geology, 相似文献
18.
正20142599Chen Sanming(Guangxi Key Laboratory of Concealed Deposits Exploration,Guilin University of Technology,Guilin541004,China);He Yuzhou Block Model and Reserves Estimation of Panzhihua Iron Deposit Based on 3D Geological Modeling(Journal of Guilin University of Technology,ISSN1674-9057,CN45-1375/N,33(4),2013,p.610-615,9illus.,1table,15refs.) 相似文献
19.
正20140594 Bai Daoyuan(Hunan Institute of Geology Survey,Changsha 410016,China);Zhong Xiang Faults in the Jingzhou Basin and Their Tectonic Settings(Geotectonica et Metallogenia,ISSN1001-1552,CN44-1595/P,37(2),2013,p.173-183,6illus.,59refs.)Key words:basin evolution,tectonic setting,South China In the Upper Paleozoic and Jurassic se- 相似文献
20.
正20141912Cao Hui(State Key Laboratory for Continental Tectonics and Dynamics,Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China)Gravitational Collapse and Folding during Orogenesis:A Comparative Study of FIA Trends and Fold Axial Plane Traces(Geology in China,ISSN1000-3657,CN11-1167/P,40(6),2013,p.1818-1828,9illus.,35refs.,with 相似文献