山门银矿黄铁矿的找矿矿物学研究及其地质意义     

崔海 《吉林地质》1993,12(4):42-54

本文对山门银矿矿体及围岩中黄铁矿进行了成因和找矿矿物学特征的研究,并在矿床研究方面和找矿方面得到应用。  相似文献   

河南灵宝地区绿岩型金矿找矿方法研究     

李洪志  杨泓清  王登红  任胜利  李艳兵 《河南国土资源》1995,(2)

本文分析了河南灵宝地区绿岩型金矿一般地质特征。并以找矿为目的，建立了５大类型１４种金矿找矿特征分类，提出了以神经网络模型为基础建立的河南灵宝地区绿岩型金矿找矿新方法，并用实例展示了该方法的应用前景。  相似文献   

An Ipswichian fluvial deposit at Fulbeck,Lincolnshire and the chronology of the Trent terraces     

Allan Brandon  Michael G. Sumbler 《第四纪科学杂志》1988,3(2):127-133

Mammalian fossils recently discovered near Fulbeck in Lincolnshire, include abundant hippopotamus, suggesting an Ipswichian date for the Fulbeck Sand and Gravel (new name). These deposits mark a former course of the River Witham; clasts indicate derivation from outcrops of Jurassic rocks and chalky till to the south and south-east. The relationship of the Fulbeck Sand and Gravel to the terrace deposits of the River Trent necessitates a revised chronology. The Balderton Sand and Gravel (new name), laid down by the Trent along its former course to the Lincoln Gap, is shown to be older than the Ipswichian Fulbeck Sand and Gravel, and was probably deposited during the Wolstonian Stage. The Eagle Moor Sand and Gravel (new name), probably glaciofluvial outwash from the chalky tills of the region, is considerably older than the Balderton Sand and Gravel and, together with the tills, is assigned to the early part of the Wolstonian, or the Anglian glacial Stage. It is suggested that the Balderton and Eagle Moor terraces equate with the lower and upper facets of the composite Hilton Terrace of the Middle Trent.  相似文献   

Evidences of Holocene transgression on Domingos Petrolini Swamp, southern coastal plain, Rio Grande do Sul, Brazil     

Soraia G.Bauermann  Paulo C.P.Neves  Marleni Marques-Toigo  Abdul R.Ashraf 《东北亚地学研究》2005,(Z1)

The Domingos Petrolini Swamp, located on the Southern Coastal Plain of Rio Grande do Sul, near the town of Rio Grande, constitutes an ample holocene lagoonal deposit. Events related to the holocene transgression and their diverse phases of glacial-eustatic ocillations were found through palynological analysis. Bases on these palynological data, four distinct phases to the paleoenvironmental evolution of the ecosystem were identified. It has also shown a transgressive restricted marine sequence on the base , which suggests the existence of a coastal brackish lagoon or a marisme type of environment. Later, there was a gradation for continentality conditions along with a scarce pollinical record. The third phase is characterized by the presence of marine components and halophyte vegetation, showing another transgressive event in that place. Lastly, the end of direct marine influence over the swamp was recorded and also the vegetation development as it appears these days.  相似文献   

高精度磁测直接找油方法技术     

周绵远  张工会  郭新顺 《地球科学与环境学报》1992,(2)

本文从成岩磁铁矿理论出发,讨论了油气藏上方的磁异常形态,阐述了利用高精度磁测直接寻找油气田的可能性及其方法技术。文章指出,用磁测直接找油,不仅要提高磁测精度,而且关键在于要能找到并能成功提取与油气藏有关的磁异常信息的方法。文中还列举了引用本文所述方法预测油气田的效果。  相似文献   

辽宁清原花岗岩-绿岩带金矿资源预测     

李俊建  韩国刚 《国土资源》1993,(3)

采用1:5万区域地质调查资料,选取16个地层、构造、火成岩及其接触带和化探数据变量。每一种预测方法,抽取了与金矿资源有关的676×16的原始数据矩阵,并且建造了金矿资源和地质环境之间的数学模型以预测区域金矿资源远景。采用的数学模型有:因子空间的欧氏距离、因子分析和特征分析法,其结果绘制在综合成矿预测图上,共圈出8个1级金矿远景区。本区已知的金矿床、矿点均落入了预测区内,并首次圈定了一些新的金矿远景区,有待进一步详细勘查工作的证实。  相似文献   

三种金银矿物的初步研究及其意义     

孙启松 《湖南地质》1994,13(4):201-204

湘西某金矿区发现的三种金银矿物，其化学成分分别为金银汞互化物和银汞互化物。本文就其镜下特征、产出形态、共生矿物、成因等作一简要介绍，期望引起关注，促进深入研究。  相似文献   

对浙江地质找矿的几点思考     

李长江  麻土华  徐有浪 《浙江国土资源》1996,(2)

本文根据矿床分布的分形丛集性、亲缘性，矿床密度分布律和储量分布律。对浙江地质找矿提出了一些新认识，并指出有待进一步研究的关键问题。  相似文献   

辽东硼镁石型硼矿床地质特征及成矿作用     

张景山 《国土资源》1994,(4)

辽东硼镁石型硼矿床赋存于早元古宙富铁、硼火山沉积岩建造中，表现出明显的地层岩性控矿性。硼的成矿作用是多期的，沉积成矿作用是基础，变质成矿作用对原始沉积矿床起了改造和富集作用，构造变形作用使硼矿体发生了重就位。硼矿床的硼质来源以火山源为主，陆源为次，矿床成因属叠生层控变质火山沉积矿床。  相似文献   

Characteristics of Quaternary deposits near Songjianghe Town on west slope of Changbai Mountain     

WANG Xi-kui  LI Jun-min  ZHANG Hong-yanCollege of Earth Sciences  Jilin University  Changchun  Jilin  China 《东北亚地学研究》2004,7(2):143-148

1GeologicalsettingThe researched area is located at the east margin of Eurasia plate and is 50 km from Changbaishan Vol-cano to west. The average elevation of the studied area is about 1 200 m and rivers flow mainly from the east to the west. There are To…  相似文献