mining dolomite problem

The Dolomite Problem – Electric Universe Geology

The question of how the mineral dolomite, occurring in sedimentary rocks throughout the Earth, was created in large quantities has concerned the geology for over 200 years now – with only moderate success in explaining it. Dolomite was identified in 1791 by the French mineralogist Déodat de Dolomieu (1750-1801).

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The Dolomite Problem | DiscoverMagazine.com

Feb 1, 1996 ... But for certain sludge-dwelling bacteria, making dolomite is no problem at all. There was a time when Earth made dolomite in great piles--piles like the Dolomite Mountains, in the Italian Alps, where French mineralogist Déodat de Dolomieu discovered the mineral in 1791. Today, though, dolomite forms in...

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The Dolomite Problem

Part of the problem was that early experiments in mineral stability suggested that dolomite should form at higher temperatures and pressures than are common in sedimentary sequences. Later research refuted that claim, showing, in fact, that seawater is grossly oversaturated with respect to dolomite and that, theoretically...

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The dolomite problem - SlideShare

Sep 3, 2017 ... KFUPM GEOL533 - Carbonates and Evaporites Assignment 3 The Dolomite Problem I. Why there … ... Outline • Introduction • What limits dolomite formation? o Mineral kinetics o Crystallization rates o Hydration o CO3 activity o Sulfate (SO4 2-) • Concluding remarks Al-Awadi, 2009 2; 3. Introduction • CaMg...

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The Dolomite Problem - just another uniformitarianist failure - YouTube

Mar 4, 2013 ... The Dolomite problem has existed in geology from the early days of the study of the features of the earth. For 200 years geologists have been unable to explain the earth's dolomites, and are still unable to account for dolomites to this day with their uniformitarian concepts. However, there is one thing that...

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The dolomite problem; control of precipitation kinetics by ... - ajsonline

The mineral dolomite and the uncertainties surrounding its origin have attracted the attention of earth scientists for over a century. The core of the dolomite "problem" is the apparent paradox posed by the paucity of dolomite in modern marine depositional environments versus its relative abundance in the sedimentary rock...

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Dolomite: the mineral that shouldn't exist - Scientists have never ...

Oct 26, 1991 ... littered with abandoned models for dolomite formation. Even today geologists debate the 'dolomite problem'. Dolomite, or calcium magnesium carbonate, CaMg(CO3)2, is a common mineral, usually found with limestone (calcium carbonate) and other sedimentary rocks. It has long been known to host...

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Bhutan cracks down on Dolomite mining - The Economic Times

Oct 17, 2012 ... Bhutan has decided to crack down on illegal mining of dolomite along the Indo-Bhutan border in an attempt to curb pollution of groundwater in the foothills of ... Following talks at various levels, including those with the Indian government, we have now realised it is a major problem and we want to take...

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What is the dolomite problem? - Quora

Ahh, the dolomite problem. We really don't have a good idea how exactly it forms! See dolomite is CaMg(CO3)2. Now calcite us CaCO3 and magnesite is MgCO3, and all these minerals occur naturally and are all three very distinct structurally. Calcite...

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Rapid Uplift: The Dolomite Problem - Peeking Under The Hood

Jun 28, 2012 ... A recent paper in Geology addresses one of the most enduring problems in sedimentary geology- the origin of the mineral dolomite. One can extend their findings to answering the origin of massive dolomite carbonate sequences that recur throughout earth history. Massive dolomite means that most of the...

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The Dolomite Problem Revisited1: International Geology Review ...

Jul 6, 2010 ... A reassessment of the abundance of dolomite in carbonate sediments has confirmed that carbonates deposited during the past 150 Ma contain, on average, less dolomite than Proterozoic and Paleozoic carbonates. The lower dolomite content of the more recent carbonate sediments results from the...

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Dolomite - Physical Properties & Healing Properties - Kidz Rocks

Dolomite is a common sedimentary rock-forming mineral that can be found in massive beds several hundred feet thick. They are found all over the world and are quite ... Disputes have arisen as to how these dolomite beds formed and the debate has been called the "Dolomite Problem". Dolomite forms rhombohedrons as its...

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Limestone: Characteristics, Uses And Problem - GSA

Oct 13, 2016 ... Limestone is a sedimentary rock composed principally of calcium carbonate (calcite) or the double carbonate of calcium and magnesium (dolomite). It is commonly composed of tiny fossils, shell fragments and other fossilized debris. These fossils are frequently visible to the unaided eye on close...

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Lithuanian mineral resources and their usage: today, future, and ...

Mineral resources have been, are now, and will be one of the main ... of the problems of living and working in environmentally sensitive areas ... dolomite, sand). So, in Lithuania there are no —hot spots“ associated with quarrying activity. Only the abstraction of groundwater from limestone and dolomite quarries, and the...

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Problems of the geochemistry of sedimentary carbonate rocks ...

the dolomite problem. Fairbridge, 1957. R.W FairbridgeThe dolomite question. Regional Aspects of Carbonate Deposition, S. E. P. M. Sp. Publ. No. 5 (1957), pp. 125-178. Faust, 1949. G.T FaustDedolomitization and its relation to a possible derivation of a magnesium-rich hydrothermal solution. Amer. Mineral., 34 (1949), pp.

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Dolomite - British Geological Survey

containing only 10–50% of the mineral dolomite are called dolomitic. ... tion of dolomite, dolomitic limestone and lime- stone. Dolomite deposits are ..... Transport issues. Most dolomite is transported by road, using backhaul opportunities where feasible. Both. Thrislington and Whitwell quarries have rail links, but only the rail...

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Dolomitic Groundwater Assessment - Department of Water Affairs

Feb 1, 2010 ... groundwater from the dolomites. By 1956, up to 50 000 m3/day was being pumped from mines such as Venterspost. During the 1960's and 70's, interest focussed mainly on mining related issues such as dewatering; in the 1980's on emergency groundwater supply to the PWV region and in the 1990's to the.

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Dolomite Guideline - Department of Water Affairs

in Gauteng Province, some parts of the North. West Province, and most of the gold-mining districts in the Far West Rand are underlain by dolomite. In Gauteng, the .... water use should match the ability of the resource to deliver a consistent supply with- out harming other users or causing ground instability problems. Typically...

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IRIN | Paying the price for mining

Feb 15, 2008 ... But another more troubling legacy is emerging as an increasingly urgent problem: environmental contamination from over 100 years of mining that could severely pollute the country's .... In the Wonderfonteinspruit area the aquifers are in dolomite, a spongy layer of rock through which water moves quickly.

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ENVIRONMENTAL POLLUTION STATUS AS A RESULT OF ...

operations. The main problem of water pollution in mining areas arises from the addition of fine dust, oil and grease wastes and in some cases acidic water and chemicals. In this paper various aspects of air and water pollution a~d their effect on the local habitat of a limestone and dolomite mine are discussed. Study Area.

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ENVIRONMENTAL POLLUTION STATUS AS A RESULT OF ...

operations. The main problem of water pollution in mining areas arises from the addition of fine dust, oil and grease wastes and in some cases acidic water and chemicals. In this paper various aspects of air and water pollution a~d their effect on the local habitat of a limestone and dolomite mine are discussed. Study Area.

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Impact of Groundwater on Mining at Finsch Diamond Mine - IMWA

Several trial and error approaches were used to estimate transmissivity. In a dolomite aquifer transmissivity values gradually decrease with the depth. This approach was used to model the shape of the cone of depression in the water levels around Finsch Mine. This method provided an acceptable result and was used to...

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Risk of Asbestos Exposure in South African Diamond Mine Workers ...

Jul 1, 2011 ... Tremolite and/or actinolite asbestos fibres have been described in talc mines in various countries (Gamble and Gibbs, 2008; Loyola et al., 2010) and limestone and dolomite mines in Finland (Juntilla et al., 1996). Amosite asbestos was reported in an iron ore mine in the USA (Nolan et al., 1999). The most...

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Dolomite Mine Peak - Anza Borrego Hiking

This hike leads you along a closed off mining site, up to the peak above the mine. This is one of the easiest peaks in the park, some gravel, this may be a problem going down again. We did some more exploring and looped back, this will make the hike moderate, some small boulders and steeper terrain. How to get here:

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Limestone and Dolomite - The Knowledge Bank at The Ohio State ...

The 1932 Revenue Act subsequently awarded metal mines a 15 per cent deple- tion allowance, oil and gas wells 27.5 per cent, coal 5 per cent, sulphur 23 per cent, and all other natural deposits and timber as individually determined by regulations. The 1932 Act caused relatively few problems in administration, and the...

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Dolomitic Groundwater Assessment - Department of Water Affairs

Feb 1, 2010 ... groundwater from the dolomites. By 1956, up to 50 000 m3/day was being pumped from mines such as Venterspost. During the 1960's and 70's, interest focussed mainly on mining related issues such as dewatering; in the 1980's on emergency groundwater supply to the PWV region and in the 1990's to the.

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pequea silver mine - Pequea Township

Mine Workings. This walking tour follows the surface outcrop of the ore veins along exposures that date from Civil War times. The block diagram of Figure 1 shows the east-west trend of these fold hinges and ... Here in the mine area, the dolomite was quite brittle and opened up .... and the Martic Problem in Pennsylvania.

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Sustainable Mining - DigitalCommons@University of Nebraska ...

It has been accepted for inclusion in Papers in Sustainable Mining by an authorized administrator ... ued research thrusts to solve the problems asso- ..... Find environmentally acceptable uses for clay settling ponds a Develop technologies for solving the dolomite problem. Improve mining and transpol-tation efficiency.

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limestone and dolomite distribution in ... - Water Research Center

Area where limestone, dolomite, or both are at the surface. Layers are usually strongly folded and ... HAZARDS—Carbonate rocks can present potential construction problems and hazards due to the presence of ... mined in Pennsylvania, accounting for about 80 percent of all nonfuel mineral pro- duction. Significant uses of...

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Sedimentary rock - Limestones and dolomites | Britannica.com

Sedimentary rock - Limestones and dolomites: Limestones and dolomites are collectively referred to as carbonates because they consist predominantly of the ... by dolomitization, a diagenetic process in which the calcium carbonate minerals aragonite and calcite are recrystallized and converted into the mineral dolomite.

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All that glitters... Acid mine drainage: The toxic legacy of gold mining ...

Sep 23, 2011 ... In 1947, in a dolomite cave 50 kilometers northwest of Johannesburg, South Africa, anthropologist Robert Broom discovered a 2.05-millionyear- old adult ... The Witwatersrand is not the only region in South Africa where acid mine drainage is a problem, but it is currently the area of greatest concern. In 2002...

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The issue of personal safety on dolomite: Update of a probability ...

INTRODUCTION. Sinkholes are treated in the paper as a chance phenomenon of which the likeli- hood of occurrence is a key parameter in determining their effect on public safety in the development on dolomite land. To deter- mine the likelihood of sinkhole occurrence, however, remains a complex if not evasive problem.

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The issue of personal safety on dolomite: a probability-based ...

The issue of personal safety on dolomite: a probability-based evaluation with respect to single-storey residential houses ..... After university, he was a structural design engineer for one year and then spent 8 years teaching at Wits, initially in civil engineering structures, but mainly in mining rock mechanics. He was...

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141 BLENDING METHODOLOGIES IN TALC OPERATIONS The ...

Ore is crushed, washed and sized prior to having dolomite contaminants removed ... Problem description. The problem posed by Western Mining Corporation involves finding a way of improving or optimising the utilisation of stakes containing ... The problem facing WMC Talc Operations is that currently the higher grade.

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Sinkholes and subsidence in South Africa - Council for Geoscience

1 Introduction to sinkholes. Certain parts of the ground surface of South Africa are prone to sudden, catastrophic collapse which may lead to death, injury or structural damage. Such features are known as sinkholes and in South. Africa occur in areas underlain by dolomite rock. Approximately 25% of Gauteng Province,...

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HIGH-CALCIUM LIMESTONE AND DOLOMITE IN INDIANA By ...

calcium limestone and dolomite are the region of outcrop of Missis sippian rocks and to a ... mine precious metals. One of the most familiar and possibly least appreciated mineral industries in Indiana is the quarrying of limestone and dolomite. ... washing or scrubbing facilities are adequate for solving the problem of harmful...

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Phosphate Research Areas - Florida Industrial and Phosphate ...

The Institute has funded research addressing issues and topics such as current mining practices; pipeline and pump design; matrix transportation; online sensors to analyze phosphate materials; land use evaluation and planning; flotation efficiency; dolomite separation; dewatering of phosphatic clay; and process control.

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Calcite-Dolomite Mapping to Assess Dolomitization Patterns ... - ITC

Research Problem. Although some research has identified and mapped surface minerals using the. HyMap (Hyperspectral Mapper) airborne hyperspectral remote sensing data, research has yet to be conducted for mapping calcite and dolomite in the Bédarieux mining area, southeastern France. A previous study mapped...

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The Mineral Industries of Cambodia and Laos in 2005

mineral policy. The department of Geology and mines and the department of Energy under the mimE are responsible for developing the country's mineral resources, providing mining .... oil find, in cambodia in Focus, issue 25, accessed January 3 , 2006, at ... coal, copper, dolomite, gold, graphite, gypsum, limestone, rock.

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www.posmining.com: แร่ยิปซั่ม แร่แอนไฮไดรต์ แร่โดโลไมต์ raw gypsum ...

P.O.S. Mining Part., Ltd. runs export businesses of different types of ore minerals, including Gypsum, Anhydrite, and Dolomite. ... We are acutely aware of the environmental problems our business can cause and we are constantly developing solutions to deal with the issues that arise from the mining process. All our...

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