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·The Bayan Obo district is located at the northern margin of the North China Craton bordering the Central Asian Orogenic Belt Fig 1a 12 19 20 The ore district is 16 km long from east to west and 3 km wide from north to south with a total area of about 48 km 2 21 According to the boundary grade of iron the Bayan Obo deposit is composed of three ore
·Ore Controlling Factors of the Ore Fields in Nanjing Wuhu Basin Yi Liu 1 2 Ming Ma 1 Xuehua Shen 1 Jie Fang 1 Hongjian Yu 1 Yong Zeng 1 2 1 Nanjing Center China Geological Survey Nanjing Jiangsu 2 China University of Geosciences Wuhan Hubei th
·Jun Yi Pan Pei Ni Zhe Chi Yu Long Yang Su Ning Li Tan Bao Wen Bin Wang Wencan Zeng Kai Xue; Spatial distribution and variation of ore body alteration and ore forming fluid of the giant Zijinshan epithermal Cu Au deposit SE
·Based on the ore body occurrence conditions of Halazi Iron Mine the stress redistribution range is approximately three times the maximum excavation size of the mining area Due to the influences of geological factors such as rock mechanical properties groundwater rock mass structure and tectonics stope dimensions support methods
·Before estimating economically mineable ore reserves of a deposit the ore body configuration must first be defined After sampling the concentration of components at a set of sample points
·Graphite deposits result from the metamorphism of sedimentary rocks rich in carbonaceous matter or from precipitation from carbon bearing fluids or melts The latter process forms vein deposits which are structurally controlled and usually occur in granulites or igneous rocks The origin of carbon the mechanisms of transport and the factors controlling
·In the mine production process pre established geological models should be updated in a timely manner based on new geologic and mining data Three dimensional 3D geological models of different engineering schedules can effectively visualize the spatial distribution of the ore body in real time displaying changes in its structure and occurrence in a
·Results identified that Sm and Y are the most abundant M−HREE in each types of iron ore in the main ore body and the content of M−HREE accounts for % % of the total REE among which the content of M−HREE in aegirine type Nb REE Fe ore ppm and fluorite type Nb REE Fe ore ppm are higher and the content of M−HREE in
·The development of iron ore deposits is accompanied by the excavation formation of considerable dimensions in the underground space and to ensure high technical and economic indicators of extraction especially when developing high grade iron ore it is necessary to take into account the nature of the geological structure of the massif on the indicators of
·The northeastern margin of the Jiaolei basin extends across several regional tectonic units including the North China plate southern margin Sulu Dabie orogen East Shandong uplift and fold belt Jiaobei uplift Jiaolei basin and the Muping Rushan high pressure metamorphic belt eclogite /granulite facies Fig 1 The Liaoshang deposit is located on the
·Ore deposit types 4 Structure of host rock or ore body unconformity type U stratiform chromite podiform chromite 5 Constituent rock s of a sedimentary sequence in which orebody occurs red bed Cu volcanic red bed Cu 6 Tectonic setting in which ore deposit is formed orogenic gold including greenstone hosted turbidite hosted
·The results from evaluating ore controlling geological factors by the weight of evidence and artificial neural network methods show that the Neoproterozoic Xinzhai Formation Pt 3 x fault F 1 and Silurian granites S 3 L have considerable control effects on the occurrence of In rich ore bodies The results of the ROC curve evaluation show
The field observations of the ore bodies like their mode of occurrence and relationship with the host rocks their relation with the regional stratigraphy and structures give the first hand information about their origin The contact of ore body and host rock is called sharp when there is an abrupt change in the critical physical and
·Ore characterization related losses continue to represent a major cost factor for mining routing processing and tailings handling De bottlenecking of existing or recent design and plant restarts can be executed faster and more
·The Pb Zn Ag Cu Sn Fe Mo metallogenic belt in the southeastern Inner Mongolia is the most important polymetallic concentration area in China Geologists have conducted detailed studies on typical polymetallic deposits but the distribution feature and ore controlling factors of the overall deposits in the study area are still unclear In this research
·Minerals 2022 13 2 3 of 15 considers the key influencing factors such as the occurrence of mining ore body joint de velopment degree and mining stress to ensure the stability of ore and rock
·Based on the theory of the ore formation rate locations with high temperature changes and fast pore fluid flow are conducive to the formation of ore bodies Hobbs et al 2008 Zhao et al 2009 The ore forming structure is closely related to the formation of the ore body The location of the ore body depends on
·Prior to mining all rocks contained in a mineral deposit must be placed in one of several categories known as ore types Each ore type describes a different way that the rock will behave in processing The ore type determines which process stream a particular mined unit will be sent to sets expectations for process engineers and metallurgists and forms the basis for
·It is also known as the ore block caving method whereby natural stress is taken as the main load of the ore body Natural caving is the only mining method that is comparable to open pit mining in
·Components of geostatistical estimation developed as a method for ore deposit assessment are discussed in detail The assumption that spatial observations can be treated as a stochastic process
·preted as having a close spatial link with ore Prospects are the basic units with which explorationists work The explorationist s job is to generate new prospects and then to explore them in order to locate and define any ore body that might lie within them Generating New Projects and Prospects
·The ore occurrence with mining value is called mineral deposit which is the product of mineral accumulation to a certain extent scattered in nature For example the average content of iron in the earth s crust is about 5% and the lowest mining grade of iron ore is 25% which indicates that iron must be enriched more than five times to
