共查询到20条相似文献，搜索用时 515 毫秒
1.
2.
3.
为探究不同类型的萤石矿所反映的自然重砂矿物组合所携带的对各类型萤石矿的指示特征,统计了浙江、湖南、湖北、青海、广西、福建、安徽、新疆、甘肃、河北共计10个地区23个典型萤石矿床的自然重砂矿物报出情况,计算各重砂矿物报出率,分析得出热液型矿、后期热液型及热液充填型3种类型萤石矿床各自对应的自然重砂矿物组合和标型矿物组合。结果显示,各类型矿床自然重砂矿物组合既有相同之处也有显示各自的特点。因此,按照矿床类型建立的自然重砂矿物组合及其含量变化,对于新一轮的矿产资源勘查具有重要的意义。 相似文献
4.
5.
走向21世纪的矿床学 总被引：10，自引：2，他引：10
文章简要回顾了百年来矿床学取得的重要进展，包括：（1）矿床成因分类的建立；（2）层控矿床研究与矿床多成因理论的兴起；（3）板块构造与区域成矿规律；（4）矿床模型；(5)型矿床研究；（6）海洋现代热液成矿作用的发现；（7）成矿演化的不可逆性与节律性等。针对21世纪中人类社会可持续发展的需要，矿床学研究出现了两个新趋势；（1）全球化；（2）矿业开发与环境保护一体化。面临着三个主要研究领域；（1）成矿理论的推陈出新；（2）研究开发新型矿产资源，建立广义的矿产资源地质学；（3）建立绿色矿业体制所需的矿床学基础研究。 相似文献
6.
Yu. G. Safonov 《Geology of Ore Deposits》2010,52(6):438-458
The issues of the theory of gold deposit formation are considered. These issues were crucial in the works by N.V. Petrovskaya.
The systematics of gold deposits based on stable mineral assemblages and mineral and geochemical types of ores and their families
characteristic of certain groups of gold deposits is consonant with contemporary analogue classifications of ore deposits,
which, however, require improvement by means of developing their genetic version. Petrovskaya’s proposed subdivision of gold
deposits into families distinguished by depth of their formation is such a version, because in Petrovskaya’s understanding,
the factor of depth integrates genetic features of deposits formed at shallow, medium, and great depths. According to recent
data, the depth interval of localization of ore deposits is estimated at 15–20 km instead of 6–10 km suggested earlier; thus,
the intervals of medium and great depths increase. Attention is called to the Petrovskaya’s ideas of stadial progressive development
of ore formation with change in pyrite-arsenopyrite mineralization by base-metal and telluride mineralization along with advanced
and concomitant deposition of quartz. The stadial formation of shallow-seated deposits and colloidal mineral formation therein,
as well as the concept of gel metasomatism and mechanisms of accompanying destruction of preceding mineral assemblages developed
by Petrovskaya, are considered and their implications are illustrated by specific deposits. Petrovskaya’s views on sources
of ore matter and the polygenetic character of gold and Au-bearing deposits are discussed. 相似文献
7.
陕西省矿床成矿系列的初步划分 总被引：8，自引：4，他引：8
通过系统总结，首次将陕西省主要矿床初步划分为4个矿床成矿系列组合，22个成矿系列类型，42个成矿系列和若干亚系列。其中省内金矿床的主要成矿系列为燕山期与变质一岩浆热液有关的金多金属矿床成矿系列、略勉板内结合带与岩浆热液有关的金矿成矿系列、商丹板块对接带与变质热液有关的金矿床成矿系列、现代河流中的冲一洪积砂金矿床成矿系列、与热水渗滤作用有关的金矿床成矿系列及活动区造山带与碱性碳酸盐类有关的金矿床成矿系列类型，银矿床的主要成矿系列为复理式建造中的菱铁矿银多金属矿床成矿系列，铜矿床的主要成矿系列为与元古代中-酸性岩有关的铁铜矿床成矿系列、加里东-印支期与中性-酸性花岗岩类有关的铁铜金钨萤石矿床成矿系列、与海相中基性火山岩有关的铜锌矿床成矿系列、前寒武系变质火山岩中的铜锌黄铁矿床成矿系列，钼矿床的主要成矿系列为与中酸性浅成-超浅成小岩体(斑岩)有关的钼铁铜矿床成矿系列，铅锌矿床的主要成矿系列为海底热液喷流-沉积铅锌矿床成矿系列、与热水渗滤作用有关的铅锌矿床成矿系列、海底喷流沉积-热液改造铅锌铜矿床成矿系列，汞锑矿床的主要成矿系列为与热水渗滤作用有关的汞锑矿床成矿系列，重晶石矿床的主要成矿系列为寒武系-奥陶系中的钒钼重晶石磷块岩黄铁矿石煤矿床成矿系列、下志留统中的重晶石铀石煤矿床成矿系列，煤矿床的主要成矿系列为大型内陆盆地中的煤油页岩成矿系列及与海陆交互相沉积岩有关的煤铝黄铁矿粘土高岭土矿床成矿系列类型，岩盐矿床的主要成矿系列为产于奥陶系中的岩盐(钠盐)矿床成矿系列。 相似文献
8.
9.
《International Geology Review》2012,54(6):552-565
Examination of mineral deposits in the Central Anatolian Crystalline Complex provides broad new insights regarding their genesis. Collision and postcollision-related magmatic processes during closure of the northern branch of the Neotethyan Ocean, caused by northward subduction of the oceanic crust beneath the Sakarya Microcontinent in the Late Cretaceous-Eocene, led to the formation of several types of mineral deposits. These include: (1) skarn-type deposits (Pb-Zn, Fe, and Fe-W skarns); (2) vein-type deposits (molybdenum, fluo-rite, stibnite-cinnabar, and stibnite-cinnabar-scheelite vein deposits); (3) sedimentary diatomite, kaolinite, salt, and uranium deposits; and (4) volcanogenic perlite, pumice, and sulfur deposits. Considering their regional distribution and relationship to the geologic evolution of the region, the skarn and vein deposits constitute an important part of the metallogeny of the Central Anatolian Crystalline Complex. 相似文献
10.
11.
中国内生稀有稀土矿床的时空分布 总被引：11，自引：5，他引：11
内生稀有稀土矿床在我国广泛分布，矿床的形成时代从太古宙到喜马拉雅期。矿床类型主要有碱性岩型、花岗岩型及花岗伟晶岩型三大类型。碱性岩型矿床的形成时代从元古宙到喜马拉雅期，主要集中在中元古代及华力西－印支期。这类矿床多分布在地台稳定区的边缘，常沿深断裂或裂谷带延展方向呈群分布。花岗岩型矿床绝大多数形成于燕山期，主要见于南岭及其邻区。成矿花岗岩常是花岗岩复式岩体的晚期侵入体，沿大岩体周边或隐伏岩体上方作定向分布。花岗伟晶岩型矿床主要形成于华力西－印支期，大多数分布在地槽褶皱带内。褶皱带内的复背斜及更次一级背斜的轴部及倾没端常是矿化伟晶岩的赋存场所。以攀西裂谷带内的牦牛坪、茨达等碱性岩型矿床，赣南加里东褶皱带内的西华山、荡坪等花岗岩型矿床，闽西北加里东褶皱带内的溪源头、西坑等花岗伟晶岩型矿床为例具体地描述了三类矿床在空间上的定向分布。西部地区是找寻大型内生稀有稀土矿床极有潜力的地区。 相似文献
12.
Mineral Deposit Densities for Estimating Mineral Resources 总被引：1，自引：0，他引：1
Donald A. Singer 《Mathematical Geosciences》2008,40(1):33-46
Estimates of numbers of mineral deposits are fundamental to assessing undiscovered mineral resources. Just as frequencies
of grades and tonnages of well-explored deposits can be used to represent the grades and tonnages of undiscovered deposits,
the density of deposits (deposits/area) in well-explored control areas can serve to represent the number of deposits. Empirical
evidence presented here indicates that the processes affecting the number and quantity of resources in geological settings
are very general across many types of mineral deposits. For podiform chromite, porphyry copper, and volcanogenic massive sulfide
deposit types, the size of tract that geologically could contain the deposits is an excellent predictor of the total number
of deposits. The number of mineral deposits is also proportional to the type’s size. The total amount of mineralized rock
is also proportional to size of the permissive area and the median deposit type’s size. Regressions using these variables
provide a means to estimate the density of deposits and the total amount of mineralization. These powerful estimators are
based on analysis of ten different types of mineral deposits (Climax Mo, Cuban Mn, Cyprus massive sulfide, Franciscan Mn,
kuroko massive sulfide, low-sulfide quartz-Au vein, placer Au, podiform Cr, porphyry Cu, and W vein) from 108 permissive control
tracts around the world therefore generalizing across deposit types. Despite the diverse and complex geological settings of
deposit types studied here, the relationships observed indicate universal controls on the accumulation and preservation of
mineral resources that operate across all scales. The strength of the relationships (R
2=0.91 for density and 0.95 for mineralized rock) argues for their broad use. Deposit densities can now be used to provide
a guideline for expert judgment or used directly for estimating the number of most kinds of mineral deposits. 相似文献
13.
14.
近年来湖南找矿突破前景乐观,如地质四一三队发现了含金刚石的橄榄钾镁煌斑岩体群。为扩大找矿突破成果,在地质项目管理中,需要理顺国家需要与地质可能、导向矿种与一般矿种、大型矿床与小型矿床、矿床新类型与传统类型以及勘查与开发等五种关系。 相似文献
15.
Fractal and Multifractal Modeling of Hydrothermal Mineral Deposit Spectrum： Application to Gold Deposits in Abitibi Area, Ontario, Canada 总被引：2，自引：0，他引：2
ChengQiuming 《中国地质大学学报(英文版)》2003,14(3):199-206
A number of fractal/multifractal methods are introduced for quantifying the mineral de-lmsit spectrum which include a number-size, grade-tonnage model, power spectrmn model,multi-fractal model and an eigeavalue spectrmn model The first two models characterize mineral deposits spec-tra based on relationships among the measures of mineral deposits.These include the number of deposits,size of deposits,concentration and volume of mineral deposits.The last three methods that deal with the spatial-temporal spectra of mineral deposit studies are all expected to be popularized in near future.A case study of hydrothermal gold deposits from the Abitibi area,a world-class mineral district is used to demonstrate the principle as well as the applications of methods proposed in this paper,It has been shown that fractal and multifractal models are generally applicable to modeling of mineral deposits and occurrences.Clusters of mineral deposits were identified by several methods including the power spectral eral deposits in the Timmins and Kirkland Lake camps. 相似文献
16.
华南海西—印支成矿期内,成矿序列完整,类型齐全,矿种繁多,为其它成矿期所莫及。沉积矿床需要稳定的地质背景,层控矿床形成的较有利的地质背景是稳中有动。 相似文献
17.
Barbara Radwanek-Bąk 《Environmental Geology》2007,52(1):137-145
The author deals with a complex, multi-criteria system of protection of mineral resources, based on the evaluation of their
deposits, both with identified and inferred reserves, and perspective areas, i.e., the areas where mineral deposits may occur.
The purpose of valorization is to compare different deposits using the same, uniform criteria, and then assign them to particular
groups with the intention of protecting the most valuable deposits and highly perspective areas more efficiently. The criteria
represent three separate groups: geological and mining assets, the level of certainty (the degree of our knowledge on the
mineral raw material and its deposit), as well as environmental and spatial planning constraints. Inclusion of the prognostic
areas (the D1 category of resources in Poland) to the procedure of deposit valorization forms the basis for their legal protection, especially
when they have not been protected until now. 相似文献
18.
层控矿床形成必须具备二个基本条件:矿源层和矿质富集作用(本文称其为地质驱动作用),二者缺一不可。本文着重分析了我国东南部地区不同时期的矿源层形成的构造环境和各种地质驱动作用及其所形成的矿床特点。 相似文献
19.
20.
铁帽波谱特征及其研究意义以新疆阿勒泰地区为例 总被引：1，自引：0，他引：1
多金属矿床铁帽与铜镍矿床铁帽,由于矿物成分、微量元素的差异而决安其波谱特征是不同的.铁帽波谱特征的研究,对于寻找金属硫化物矿床和矿床评价方面有着十分重要的理论意义和现实意义. 相似文献