The host rock for the mineralization can range from ultramafic to felsic. Ore deposits intro lecture 10 ore and mineral deposits. Explorationists, for example, use the tools of geology, geochemistry, geophysics, and other fields to identify mineral. Exploration history of the resolution copper deposit. View notes ore deposits intro lecture 10 from geol 205 at university of south carolina. In recent years more and more focus has been given by legislators to the handling of interest rate risks in the banking industry. This course will cover the geological setting and mineralogy of ore bodies, as well as the. At the surface, the gossan cap undergoes the most extensive leaching and the sulfides, carbonates and most silicates that were once present are, in general, completely weathered away.
Multiple constraints from chospbsr isotopic compositions. Use features like bookmarks, note taking and highlighting while reading the geology of ore deposits. One important aspect of these disciplines is the identification and evaluation of mineral deposits. Despite its small size, tasmania has a remarkable geological diversity and abundance of mineral deposits. It uses statistics and probability to define areas that have undiscovered deposits.
Ore deposits are crustal concentrations of useful elements that can be exploited at a profit. Rocks from every period of the earths history from the middle proterozoic are present and there have been at least four major episodes of economic mineralisation. Because different geological processes can form circular structures, such as eruption of a volcano and complex folding, other diagnostic features need to be found. Only students with a semestermodule mark of more than 50% and an exam mark of more than 35% will be. To the first or contactmetamorphic class belong the deposits worked by the bluestone, mason valley, and other mines. Ferruginous laterite and ochre generally work as capping of the manganese deposits. Geology, ore deposits, and mineral potential of the seward peninsula, alaska by c. The growth in the metal ore mining market is due to the expectation of greater stability in the commodity prices, and rising demand for iron ore products from developing countries such. Estimates of the tonnage and average grade of ore deposits orereserve estimates are made for various purposes. Sedimentary ore deposit environments linkedin slideshare. Lecture title jensenbateman ore generation 8192, 95104, 312322. Ores recovered by mining include metals, coal, oil shale, gemstones, limestone, chalk, dimension stone, rock salt, potash, gravel, and clay.
The enrichment of ore deposits william harvey emmons. Ore minerals occur as disseminations and in stockworks of veins in hydrother. Signs of evaporitic precursors are sporadically present on the zambian side, with dolomite the most common. Therefore, deposits held for transactional purposes are usually seen as more stable even though they often have lower deposit rates. Kong, zhigang wu, yue liang, ting zhang, feng meng, xuyang lu, lin and yang, g. Evolution of ore deposits and technology transfer project usgs. The use of apwp to date ore deposits has been applied successfully to mississippi valleytype mvt leadzinc deposits e.
However, on this case, such precise and accurate classifications would completely depend on the information data of ore formation conditions. Role of magmatic activity in the generation of ore deposits mdpi. Interpretation of ore textures and paragenetic sequences. This fee structure is based on all 8 units being completed at uwa. Skinner, editor first edition, 1999 graphic design and layout by johnson printing boulder, co printed by sheridan books, inc. This major, previously unknown structure dropped strata in its southern wall by at least 3,000 feet. Chapter 2 origin and timing of banded iron formation. Therefore, an oreforming process is required which enriches uranium over its global geochemical background by a factor of 100 to 10,000. Pete sainsbury l introduction the writer first began geologic studies on the seward peninsula in 1952. Evolution of ore deposits and technology transfer project. Economic evaluation of mineral deposits springerlink. The regulations focus on modeling the amount of core deposits of nmds and on the. Ore deposits ore is a metalliferous mineral, or an aggregate of metalliferous minerals, more or less mixed with gangue non ore, wall rock or waste rock which from the standpoint of the metallurgist can be treated at a profit.
Satsuma lwo lima fumaroles 500 1500 white island volcanic aerosols vapour halite liquid 6000c 1. Mining is the extraction of valuable minerals or other geological materials from the earth, usually from an ore body, lode, vein, seam, reef or placer deposit. In the first half of the 20th century such geologists as v lindgren 8 and v obruchev 4. It is clearly structured, simply illustrated and lucidly explained. Introduction surficial earth processes sedimentary ore deposit environments sedimentary mineral deposits 1 deposits formed by sedimentation ironstone, calcium carbonate, chert, sulfur, uranium, copper.
These deposits form a mineralized package that is of economic interest to the miner. Eg50g economic geology metallic and nonmetallic ore deposits poster 236 banded iron formation deposits from the tiris region western sahara. Ore deposit geology by john ridley, 9781107022225, available at book depository with free delivery worldwide. Such enrichment is possible by leaching of large rock volumes by oxidized warm water and precipitation of urani. Ore deposit geology john ridley, colorado state university. Students who gain less than 40% in the exam will be considered to have failed the course, irrespective of the semestermodule mark. Ore minerals, mineral deposits and processes of their formation. Metallogeny of the bohemian massif and of the western. This course provides a nontechnical introduction to the basic concepts of. Characteristic ore deposits sou mantle wedge rces of metals and volatiles in arc magmas. Pdf ore geology and industrial minerals an introduction. Magmatic ore deposits magmatic ore deposits are those which are formed during crystallization of a magma, deep underground.
The general attributes of porphyry copper deposits are summarized below. Brief description in hypogene parts of porphyry copper deposits, the copper occurs predominantly in chalcopyrite. Readings are listed as specific page numbers from the above textbook, which is on reserve in the geology library. Economic geology and mineral economics encompass a variety of activities. Sources of ore forming material for pbzn deposits in the sichuanyunnanguizhou triangle area.
First, as magma crystallizes, heavy dense minerals that crystallize first may become concentrated near the bottom of the magma chamber. This is ore deposit geology the way most professional economic geologists think, using deposit descriptions as a basis for understanding genetic processes. Introduction ore deposits are crustal concentrations of useful elements that can be exploited at a pro. Future understanding of tectonics, ores, resources. If youve been searching for a modern textbook on metallic ore deposits, this is a good choice. Geological characteristics and distribution of ore deposits, including deposits of base and precious metals, diamonds, and industrial minerals. Like all crustal rocks, they consist of minerals formed by geological. An introduction to sedimentary ore deposits is to geologists. The applicable interest rate is available by contacting us at one of our branches or by using phone banking. An introduction article pdf available in geological society london special publications 3931 september 2014 with 1,470 reads how we measure reads. Page 231 replacement of limestone and genetically associated with metamorphism of a kind usually attributed to the contact action of intrusive rock, 2 metasomatic vein deposits in altered limestone, and 3 metasomatic vein deposits in granodiorite.
If you do experience problems downloading ore deposit geology by professor john ridley pdf, you are welcome to report them to us. The latest knowledge on mineral ore genesis and the exploration of ore deposits global demand for metals has risen considerably over the past decade. Industrial drive chelsea, mi 48118 additional copies of this publication can be obtained from society of economic geologists, inc. Ore minerals minerals with economic value are ore minerals minerals often associated with ore minerals but which do not have economic value are gangue minerals key to economic deposits are geochemical traps metals are transported and precipitated in a very concentrated fashion gold is almost 1,000,000 times less abundant than is iron economic. Economic consideration principal steps in the establishment and operation of a mine. Fox called attention to electric activity in ore deposits. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Occurrence of manganese ore deposits and their mineralogy. The geology of ore deposits kindle edition by guilbert, john m. Mineral paragenesis and textures in mineral deposits 5. If a given area has a high probability of 10 deposits and five have been discovered, then there remains the probability of. Mineralogy and petrography of ore and gangue minerals under the reflected and transmitted light microscope and in hand specimen. Impactrelated ore deposits 3 impact structures are in general circular hawke 2004. Many of the first miners in the colorado mountains did not find minerals because.
Petrology of ore deposits university of south alabama. The deposit can consist of massive ores in some cases, and disseminations of rare minerals in others. Entirely concealed by postmineral volcanic cover, the north boundary fault. The location of the ore may be at the immediate contact between the intrusion and its host rocks, or at a certain distance. Currentchequesavings account and fixed deposit terms. This is known as crystal settling and may produce deposits of metals such as iron and chromium. Lecture 2 ore deposit classification and ore reserves. Macalister, donald alexander, 1875publication date 1920 topics ore deposits publisher london. Future understanding of tectonics, ores, resources, environment and sustainability skarn deposits zhaoshan chang1 and larry meinert2 1 egru, james cook university. They may be made by examining engineers as a basis for placing a value on a mining property in connection with reports on behalf of owners or vendors, on the one hand, or for prospective purchasers or lessees, on the other. Ross abstract the shafter mining district is principally notable for the presidio mine, which.
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