青山洞金矿床成因及找矿模型探讨     

唐卫国 《矿产与地质》2009,23(5):426-430

青山洞金矿位于湖南西南部的雪峰弧形构造成矿带上,是该成矿区带近年来新发现的重要金矿床。通过对青山洞金矿床地质特征的研究,分析其矿床成因类型属构造岩浆＋变质热液并以充填交代方式形成的韧脆性剪切带型金矿床,具硫化物-自然金矿石建造,工业类型为破碎蚀变岩型。并初步总结了成矿模式并建立了找矿模型,为寻找同类型金矿提供参考和指导。  相似文献   

狼山-渣尔泰山成矿带铁铜铅锌多金属硫化物矿床特征研究   总被引：2，自引：0，他引：2  

陈喜峰 《矿产与地质》2009,23(4):291-296

狼山-渣尔泰山多金属成矿带位于华北地台北缘西段的中元古代被动陆缘裂陷槽内,其产出的多处大型-超大型铜、铅、锌、铁多金属硫化物矿床的矿床特征具相似性和可对比性。通过分析该成矿带的区域地质背景、含矿建造特征及其产出的典型矿床（东升庙、炭窑口、霍各乞、甲生盘）的矿床地质特征,得出该成矿带内铜铅锌铁多金属硫化物矿床的以下特征：①盆地控矿特征十分明显;②成矿过程中伴有与成矿作用关系密切的同生断裂活动和同沉积期火山活动;③成矿元素具分带性和规律性组合的特征;④各典型矿床具鲜明的“时控”、“层控”和“岩控”特点;⑤成矿作用具有间歇性和多期演化成矿的特征;⑥含矿建造具有典型地球化学剖面结构序列特征;⑦矿体的产状与含矿岩系一致,且相应类型的矿石对应相应的容矿岩性。  相似文献   

内蒙古哈拉胜铅-锌、银矿床地质特征及其构造控矿机理探讨     

孙振江  张福江 《矿产与地质》2009,23(1)

通过对哈拉胜铅锌银矿床成矿地质背景、矿床地质特征及邻域大地构造运动演化史分析,探讨了矿床的控矿构造特征和该区今后的找矿方向。  相似文献   

青海都兰吉给申地区铜铅锌多金属矿床地质特征及找矿方向   总被引：1，自引：0，他引：1  

肖文进 《矿产与地质》2009,23(1)

吉给申铜铅锌多金属矿床处于柴北缘铅锌银铜金多金属成矿带东段,受上奥陶统滩涧山群(O3tn)地层控制,文章介绍了铜铅锌多金属矿床的地质特征,认为其成因为热水沉积—热液改造型铜铅锌型矿床,提出找矿标志,结合以往资料,指出了该区的找矿方向。  相似文献   

湖北省宜昌市彭家河石榴石矿床地质特征及成因分析   总被引：1，自引：1，他引：0  

晏久平 《矿物岩石》2009,29(1)

运用矿物学、岩石学的方法对宜昌黄陵地区彭家河石榴石矿床中含矿层的矿物组合、化学成分、变质相及原岩特征进行分析与研究,结果表明彭家河石榴石矿床的含矿层位为水月寺群的周家河组,石榴石主要赋存于含(石墨)矽线石榴黑云斜长片麻岩及石榴黑云斜长片麻岩中,前者石榴石含量较高10%～50%,后者含量稍低12%～36%,X衍射及电子探针分析矿床中石榴石以铁铝榴石为主,其次是镁铝榴石,少量钙铝榴石.运用变质反应平衡温压方程计算出成矿温压条件为:P=600 MPa～800 MPa,T=650℃～750℃;变质相为高角闪岩相,高角闪岩相的富铁铝质沉积变质岩系--孔兹岩系是寻找此类石榴石矿床的重要找矿标志.  相似文献   

上扬子晚古生代海相地层锶同位素曲线的LOWESS拟合   总被引：1，自引：0，他引：1  

黄喻  黄思静 《矿物岩石》2009,29(1)

目前仍难以有一种具体的函数关系来描述随时问或随地层厚度变化的地质数据,L0wESS方法被证明是拟合这类数据的较为有效的方法.采用LOWESS方法对我国上扬子地区晚古生代98个海相碳酸盐的锶同位素数据进行科学的拟合,使拟舍得出的曲线具有更好的全球可对比性,从而提高我国锶同位素地层学的研究水平,并使之与相应的国际研究接轨.同时,还从数学角度讨论参数回归和非参数回归的区别,并对影响拟合结果的两个参数和误差范围进行讨论.  相似文献   

西天山伊宁地块主褶皱幕鄯善运动的确立及地质意义   总被引：7，自引：0，他引：7  

李永军  杨高学  张天继  栾新东  王晓刚 《地球科学进展》2009,24(4):420-427

地层不整合接触是研究地质发展历史及鉴定地壳运动特征和运动时期的重要依据,主褶皱幕是一造山带多幕构造运动中起决定性作用和最为重要的一次构造运动。天山的构造运动幕次多且因地而异,前人认识多有分歧,也没有确立主褶皱幕。伊宁地块伊什基里克山一带上、下石炭统之间为角度不整合接触关系,在岩石组合、沉积环境、古生物地理区系、构造样式、区域大地构造背景等方面差异最为显著,凸显了鄯善运动对区内构造格架和盆山演化起到决定性的作用,因而是主褶皱幕。鄯善运动记录了西天山沟—弧—盆格局消亡,天山残余小洋盆终结,塔里木板块和准噶尔板块最终拼合在一起,形成了统一大陆的重要演化信息。  相似文献   

贵州务川瓦厂坪铝土矿床地质特征   总被引：4，自引：0，他引：4  

金中国  武国辉  赵远由  苏之良 《矿产与地质》2009,23(2)

研究表明[2~5],铝土矿产于中下志留统韩家店组(S1-2hj)页岩或上石炭统黄龙组(C2h)灰岩侵蚀面上,含矿层位为中二叠统梁山组(P2l),赋矿围岩主要为炭质页岩和铝土质页岩,分布受向斜构造控制,含矿岩系厚度与铝土矿层厚度、铝土矿石质量关系密切;矿床成因属古风化壳沉积型。  相似文献   

Determination of Rare Earth Elements, Sc, Y, Zr, Ba, Hf and Th in Geological Samples by ICP-MS after Tm Addition and Alkaline Fusion   总被引：2，自引：0，他引：2  

Germain Bayon  Jean Alix Barrat  Joël Etoubleau  Mathieu Benoit  Claire Bollinger  Sidonie Révillon 《Geostandards and Geoanalytical Research》2009,33(1):51-62

We present a revised method for the determination of concentrations of rare earth (REE) and other trace elements (Y, Sc, Zr, Ba, Hf, Th) in geological samples. Our analytical procedure involves sample digestion using alkaline fusion (NaOH-Na₂O₂) after addition of a Tm spike, co-precipitation on iron hydroxides, and measurement by sector field-inductively coupled plasma-mass spectrometry (SF-ICP-MS). The procedure was tested successfully for various rock types (i.e., basalt, ultramafic rock, sediment, soil, granite), including rocks with low trace element abundances (sub ng g⁻¹). Results obtained for a series of nine geological reference materials (BIR-1, BCR-2, UB-N, JP-1, AC-E, MA-N, MAG-1, GSMS-2, GSS-4) are in reasonable agreement with published working values.  相似文献   

Sulfur Determination in Geological Samples Based on Coupled Analytical Techniques: Electric Furnace-IC and TGA-EGA     

Maria F. Gazulla  Maria P. Gómez  Mónica Orduña  Eulalia Zumaquero  Sonia Vicente 《Geostandards and Geoanalytical Research》2009,33(1):71-84

A study has been undertaken to determine sulfur in geological samples by coupled analytical techniques. Two measurement methods have been developed: one using an electric furnace coupled to an ion chromatograph (electric furnace-IC) and another using infrared (IR) and quadrupole mass spectrometry (QMS) for evolved gas analysis (EGA) coupled with a thermogravimetric analyser (TGA). In the electric furnace-IC method, measurement was performed without any sample pre-treatment. The measurement conditions were optimised by varying sample quantity, type of catalyst (WO₃, Cu, W and V₂O₅) and sample/catalyst ratio, and the detection limit was 10 μg g⁻¹. Sulfur ores decompose at different temperatures. However, TGA-EGA allowed identification of the different forms of sulfur in the sample, even when they were found in very low concentrations, because the sulfur was continuously analysed. The developed chromatographic method allowed simultaneous analysis of several sample components, such as S, Cl and F, with a low detection limit. The method was much faster and more specific than the methods described in the literature. The results of the sulfur determination had low scatter, possibly because the samples underwent little handling during analysis: the operator only weighed and placed the sample in the furnace, the rest of the measurement process was fully automated. The results obtained by both the developed methods have been validated by using reference materials and comparison with combustion-IR spectroscopy, a standard method for determining total sulfur in a sample.  相似文献