Bushveld Igneous Complex
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Beneficiation of Stillwater Complex Rock for the Production of Lunar Simulants
National Aeronautics and NASA/TM—2014–217502 Space Administration IS20 George C. Marshall Space Flight Center Huntsville, Alabama 35812 Beneficiation of Stillwater Complex Rock for the Production of Lunar Simulants D.L. Rickman Marshall Space Flight Center, Huntsville, Alabama C. Young Metallurgical and Materials Engineering, Montana Tech, Butte, Montana D. Stoeser USGS, Denver, Colorado J. Edmunson Jacobs ESSSA Group, Huntsville, Alabama March 2014 The NASA STI Program…in Profile Since its founding, NASA has been dedicated to the • CONFERENCE PUBLICATION. Collected advancement of aeronautics and space science. The papers from scientific and technical conferences, NASA Scientific and Technical Information (STI) symposia, seminars, or other meetings sponsored Program Office plays a key part in helping NASA or cosponsored by NASA. maintain this important role. • SPECIAL PUBLICATION. Scientific, technical, The NASA STI Program Office is operated by or historical information from NASA programs, Langley Research Center, the lead center for projects, and mission, often concerned with NASA’s scientific and technical information. The subjects having substantial public interest. NASA STI Program Office provides access to the NASA STI Database, the largest collection of • TECHNICAL TRANSLATION. aeronautical and space science STI in the world. English-language translations of foreign The Program Office is also NASA’s institutional scientific and technical material pertinent to mechanism for disseminating the results of its NASA’s mission. research and development activities. These results are published by NASA in the NASA STI Report Specialized services that complement the STI Series, which includes the following report types: Program Office’s diverse offerings include creating custom thesauri, building customized databases, • TECHNICAL PUBLICATION. -
Mineral Profile
Platinum September 2009 Definition, mineralogy and Pt Pd Rh Ir Ru Os Au nt Atomic 195.08 106.42 102.91 192.22 101.07 190.23 196.97 deposits weight opme vel Atomic Definition and characteristics 78 46 45 77 44 76 79 de number l Platinum (Pt) is one of a group of six chemical elements ra UK collectively referred to as the platinum-group elements Density ne 21.45 12.02 12.41 22.65 12.45 22.61 19.3 (gcm-3) mi (PGE). The other PGE are palladium (Pd), iridium (Ir), osmium e Melting bl (Os), rhodium (Rh) and ruthenium (Ru). Reference is also 1769 1554 1960 2443 2310 3050 1064 na point (ºC) ai commonly made to platinum-group metals and to platinum- Electrical st group minerals, both often abbreviated to PGM. In this su resistivity r document we use PGM to refer to platinum-group minerals. 9.85 9.93 4.33 4.71 6.8 8.12 2.15 f o (micro-ohm re cm at 0º C) nt Chemically the PGE are all very similar, but their physical Hardness Ce Minerals 4-4.5 4.75 5.5 6.5 6.5 7 2.5-3 properties vary considerably (Table 1). Platinum, iridium (Mohs) and osmium are the densest known metals, being significantly denser than gold. Platinum and palladium are Table 1 Selected properties of the six platinum-group highly resistant to heat and to corrosion, and are soft and elements (PGE) compared with gold (Au). ductile. Rhodium and iridium are more difficult to work, while ruthenium and osmium are hard, brittle and almost pentlandite, or in PGE-bearing accessory minerals (PGM). -
Timeline of Natural History
Timeline of natural history This timeline of natural history summarizes significant geological and Life timeline Ice Ages biological events from the formation of the 0 — Primates Quater nary Flowers ←Earliest apes Earth to the arrival of modern humans. P Birds h Mammals – Plants Dinosaurs Times are listed in millions of years, or Karo o a n ← Andean Tetrapoda megaanni (Ma). -50 0 — e Arthropods Molluscs r ←Cambrian explosion o ← Cryoge nian Ediacara biota – z ←Earliest animals o ←Earliest plants i Multicellular -1000 — c Contents life ←Sexual reproduction Dating of the Geologic record – P r The earliest Solar System -1500 — o t Precambrian Supereon – e r Eukaryotes Hadean Eon o -2000 — z o Archean Eon i Huron ian – c Eoarchean Era ←Oxygen crisis Paleoarchean Era -2500 — ←Atmospheric oxygen Mesoarchean Era – Photosynthesis Neoarchean Era Pong ola Proterozoic Eon -3000 — A r Paleoproterozoic Era c – h Siderian Period e a Rhyacian Period -3500 — n ←Earliest oxygen Orosirian Period Single-celled – life Statherian Period -4000 — ←Earliest life Mesoproterozoic Era H Calymmian Period a water – d e Ectasian Period a ←Earliest water Stenian Period -4500 — n ←Earth (−4540) (million years ago) Clickable Neoproterozoic Era ( Tonian Period Cryogenian Period Ediacaran Period Phanerozoic Eon Paleozoic Era Cambrian Period Ordovician Period Silurian Period Devonian Period Carboniferous Period Permian Period Mesozoic Era Triassic Period Jurassic Period Cretaceous Period Cenozoic Era Paleogene Period Neogene Period Quaternary Period Etymology of period names References See also External links Dating of the Geologic record The Geologic record is the strata (layers) of rock in the planet's crust and the science of geology is much concerned with the age and origin of all rocks to determine the history and formation of Earth and to understand the forces that have acted upon it. -
South Africa
Safrica Page 1 of 42 Recent Reports Support HRW About HRW Site Map May 1995 Vol. 7, No.3 SOUTH AFRICA THREATS TO A NEW DEMOCRACY Continuing Violence in KwaZulu-Natal INTRODUCTION For the last decade South Africa's KwaZulu-Natal region has been troubled by political violence. This conflict escalated during the four years of negotiations for a transition to democratic rule, and reached the status of a virtual civil war in the last months before the national elections of April 1994, significantly disrupting the election process. Although the first year of democratic government in South Africa has led to a decrease in the monthly death toll, the figures remain high enough to threaten the process of national reconstruction. In particular, violence may prevent the establishment of democratic local government structures in KwaZulu-Natal following further elections scheduled to be held on November 1, 1995. The basis of this violence remains the conflict between the African National Congress (ANC), now the leading party in the Government of National Unity, and the Inkatha Freedom Party (IFP), the majority party within the new region of KwaZulu-Natal that replaced the former white province of Natal and the black homeland of KwaZulu. Although the IFP abandoned a boycott of the negotiations process and election campaign in order to participate in the April 1994 poll, following last minute concessions to its position, neither this decision nor the election itself finally resolved the points at issue. While the ANC has argued during the year since the election that the final constitutional arrangements for South Africa should include a relatively centralized government and the introduction of elected government structures at all levels, the IFP has maintained instead that South Africa's regions should form a federal system, and that the colonial tribal government structures should remain in place in the former homelands. -
Predictability of Pothole Characteristics and Their Spatial Distribution At
79_Chitiyo:Template Journal 12/15/08 11:16 AM Page 733 Predictability of pothole characteristics J o and their spatial distribution at u Rustenburg Platinum Mine r n by G. Chitiyo*, J. Schweitzer*, S. de Waal*, P. Lambert*, and a P. Olgilvie* l P a p Synopsis thermo-chemical erosion of the cumulus floor by new influxes of superheated magma best explains the observed data. e Prediction of pothole characteristics is a challenging task, Partial to complete melting of the cumulate floor occurred in r confronting production geologists at the platinum mines of three phases. The first represents the emplacement of hot the Bushveld Complex. The frequency, distribution, size, magma. This magma, due to turbulent flow and high chemical shape, severity and relationship (FDS3R) of potholes has a and physical potential, aggressively attacks the existing floor huge impact on mine planning and scheduling, and (crystal mush on the magma/floor interface). Regional consequently cost. It is with this in mind that this study was erosion is manifested by large, often coalescing potholes. initiated. During the second phase, when the magma emplacement Quantitative analysis of potholes indicates that pothole process ceased and cooling in situ started, two distinct size (area covered) can be described by two partly periods of pothole formation ensued. The first is related to overlapping lognormal distributions. These are referred to as rapid cooling along the relatively steep part of the Newton Populations A (smaller) and B (larger). The range of Cooling Curve, when Population B potholes nucleated observed pothole sizes conforms to a simple double randomly and grew rapidly with concurrent convective exponential growth model based on Newton’s Cooling Curve. -
Comparison of Extent and Transformation of South Africa's
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by South East Academic Libraries System (SEALS) Research in Action South African Journal of Science 97, May/June 2001 179 remote sensing applications in South Comparison of extent and Africa. This is a hierarchical framework designed to suit South African conditions, transformation of South Africa’s and incorporates known land-cover types that can be identified in a consistent woodland biome from two national and repetitive manner from high- resolution satellite imagery such as Land- databases sat TM and SPOT.The ‘natural’vegetation classes are based on broad, structural M.W. Thompsona*, E.R. Vinka, D.H.K. Fairbanksb,c, A. Ballancea types only, and are not intended to be and C.M. Shackletona,d equivalent to a floristic or ecological vege- tation classification. It is important to understand that a HE RECENT COMPLETION OF THE SOUTH Fairbanks et al.5 combination of both the NLC database’s TAfrican National Land-Cover Database This paper compares the distribution ‘Woodland’ and ‘Thicket, Bushland, and the Vegetation Map of South Africa, and location of woodland and bushveld- Bush-Clump & Tall Fynbos’ land-cover Swaziland and Lesotho, allows for the first type vegetation categories defined within classes were used in the comparison with time a comparison to be made on a national scale between the current and potential the NLC data, and the equivalent the DEAT defined ‘Savanna Biome’. The distribution of ‘natural’ vegetation resources. ‘Savanna Biome’ class defined within the inclusion of the NLC’s ‘Thicket, Bushland This article compares the distribution and DEAT’s ‘VegetationMap’ data. -
National Forests Act: List of Protected Tree Species
6 No. 37037 GOVERNMENT GAZETTE, 22 NOVEMBER 2013 GOVERNMENT NOTICES GOEWERMENTSKENNISGEWINGS DEPARTMENT OF AGRICULTURE, FORESTRY AND FISHERIES DEPARTEMENT VAN LANDBOU, BOSBOU EN VISSERYE No. 877 22 November 2013 NOTICE OFOF THETHE LISTLIST OFOF PROTECTEDPROTECTED TREE TREE SPECIES SPECIES UNDER UNDER THE THE NATIONAL NATIONAL FORESTS ACT, 19981998 (ACT(ACT NO No. 84 84 OF OF 1998) 1998) By virtue of powers vested in me under Section 15(3) of the National Forests Act, 1998, I, Tina Joemat-Pettersson, Minister of Agriculture, Forestry and Fisheries hereby publish a list of all protected trees belonging to a particular species under Section 12(1) (d) set out in Schedule below. The effect of this declaration is that in terms of Section 15(1) of the National Forests Act, 1998, no person may cut, disturb, damage or destroy any protected tree or possess, collect, remove, transport, export, purchase, sell, donate or in any other manner acquire or dispose of any protected tree or any forest product derived from a protected tree, except under a licence or exemption granted by the Minister to an applicant and subject to such period and conditions as may be stipulated. Contravention of this declaration is regarded as a first category offence that may result in a person who is found guilty of being sentenced to a fine or imprisonment for a period up to three years, or to both a fine and imprisonment. SCHEDULE A / BYLAE A Botanical Name English Other Common Names National Common Afrikaans (A), Northern SothoTree Names (NS),SouthernSotho (S),Number Tswana (T), Venda (V), Xhosa (X), Zulu (Z) Acacia erioloba Camel thorn Kameeldoring (A) / Mogohlo (NS) / 168 Mogotlho (T) Acacia haematoxylon Grey camel thorn Vaalkameeldoring (A) / Mokholo (T) 169 Adansonia digitata Baobab Kremetart (A) /Seboi (NS)/ Mowana 467 (T) Afzelia quanzensis Pod mahogany Peulmahonie (A) / Mutokota (V) / 207 lnkehli (Z) Balanites subsp. -
REFERENCES to COLONIALISM, COLONIAL, and IMPERIALISM South Africa Truth Commission
REFERENCES TO COLONIALISM, COLONIAL, AND IMPERIALISM South Africa Truth Commission Abstract A list of references to colonialism, colonial, and imperialism in the South Africa Truth Commission. Chelsea Barranger Links to Data Visualization This section contains links to all data visualization for the South Africa report. Comparison Charts • References to Colonialism, Colonial, and Imperialism chart • References to Colonialism, Colonial, and Imperialism excel list Word Trees • Colonial • Colonialism • Imperialism References to Colonialism, Colonial, and Imperialism This section contains all references to colonialism, colonial, and imperialism from the South Africa report. <Files\\Truth Commission Reports\\Africa\\SouthAfrica.TRC_.Report-FULL> - § 64 references coded [0.13% Coverage] Reference 1 - 0.01% Coverage 1834 (when slavery was abolished). b The many wars of dispossession and colonial conquest dating from the first war against the Khoisan in 1659, through several so-called frontier conflicts as white settlers penetrated northwards, to the Bambatha uprising of 1906, the last attempt at armed defence by an indigenous grouping. c The systematic hunting and Reference 2 - 0.01% Coverage violation of shocking proportions.2 f The genocidal war in the early years of this century directed by the German colonial administration in South West Africa at the Herero people, which took them to the brink of extinction. 8 It is also important Reference 3 - 0.01% Coverage trees are stripped and leafless. 16 But if this was an act of wholesale dispossession and discrimination, so too was the 1909 South Africa Act which was passed, not by a South African legislature, but by the British Parliament. In terms of the South Africa Act, Britain’s four South African colonies were merged into one nation and granted juridical independence under a constitutional arrangement that transferred power in perpetuity to a minority of white voters. -
Noritic Anorthosite Bodies in the Sierra Nevada Batholith
MINERALOGICAL SOCIETY OF AMERICA, SPECIAL PAPER 1, 1963 INTERNATIONALMINERALOGICAL ASSOCIATION,PAPERS, THIRD GENERAL MEETING NORITIC ANORTHOSITE BODIES IN THE SIERRA NEVADA BATHOLITH ALDEN A. LOOMISl Department of Geology, Stanford University, Stanford, California ABSTRACT A group of small noritic plutons were intruded prior to the immediately surrounding granitic rocks in a part of the composite Sierra Nevada batholith near Lake Tahoe. Iron was more strongly concentrated in the late fluids of individual bodies than during the intrusive sequence as a whole. Pyroxenes are more ferrous in rocks late in the sequence, although most of the iron is in late magnetite which replaces pyroxenes. Both Willow Lake type and normal cumulative layering are present. Cumulative layering is rare; Willi ow Lake layering is common and was formed early in individual bodies. Willow Lake layers require a compositional uniqueness providing high ionic mobility to explain observed relations. The Sierran norites differ from those in large stratiform plutons in that (1) the average bulk composition is neritic anorthosite in which typical rocks contain over 20% AbO" and (2) differentiation of both orthopyroxene and plagioclase produced a smooth progressive sequence of mineral compositions. A plot of modal An vs. En for all the rocks in the sequence from early Willow Lake-type layers to late no rite dikes defines a smooth non-linear trend from Anss-En76 to An,,-En54. TLe ratio An/ Ab decreased faster than En/Of until the assemblage Anso-En65 was reached and En/Of began to decrease more rapidly. Similar plots for large stratiform bodies show too much scatter to define single curves. -
F Makwara (PDF)
CHROMITE GEOLOGY OF ZIMBABWE AND RELATED MINING CHALLENGES PRESENTATION GREAT DYKE : MUTORASHANGA AUGUST 2017 2 WORLD CHROME RESOURCE Estimate World Chromite Resource : +-12 Billion Tonnes • South Africa : 72% of world Resource - Stratiform • Zimbabwe: 12% -Stratiform & podiform • Kazakhstan: 4% - Podiform • Finland : 2% -Podiform • India : 1% -Podiform • Turkey and others : 9% -Largely podiform But Zimbabwe companies producing at full capacity is not in the top 5 producing companies . STRATIFORM & PODIFORM GEOLOGY LOCATION GEOLOGY MAP - ZIMBABWE MASHONALAND CENTRAL MASHONALAND WEST CHIRUMANZU MIDLANDS MASVINGO MBERENGWA 5 LOCATION OF STRATIFORM CHROMITE RESOURCE • Mashonaland Central: North Dyke Tengenenge Impinge Birkdale Mutorashanga • Mashonaland West: Middle Dyke Ngezi Darwendale Maryland Lembe/Mapinga Mutorashanga • Midlands: South Dyke Lalapanzi Mapanzure Bannockburn CSC LOCATION OF PODIFORM CHROMITE RESOURCES • Midlands: Valley Nhema Chirumanzu Mberengwa • Masvingo: Mashava THE GREAT DYKE AND PODIFORMS GEOLOGY • THE GREAT DYKE • Tengenenge to Mberengwa, Location • Stretches for 550km and is 4-11km wide. • PODIFORM • Isolated chrome resources in Shurugwi,Mashava ,Nhema ,Valley, Chirumanzu and Mberengwa • THE DYKE : STRATIFORM • Chromite hosts rocks are :Harzburgite, dunite, serpentinite and pyroxenite Host Rock • PODIFORM • Chromite host rocks are: Serpentinite ,Silicified Talc Carbonate and Talc Carbonate • 10 known seams, The 11 th seam is poorly exposed in the North Dyke • 8cm to 40cm thickness Chrome Seams • Average vertical spacing of seams is 30-40m • Geotechnical Parameters considered fore seams are: Seam Widths, quality, dip, friability, & continuity • Platinum Group Metals Known Minerals in • Chrome the Dyke • Asbestos • Nickel 8 CHROMITE RESOURCES • The dyke intruded as an ultramafic sill ,estimated age 2.7 Ga . STRATIFORM • 11 seams are known to exist on the Great Dyke, but not evenly distributed through out the dyke. -
Mining Within Zimbabwe's Great Dyke: Extent , Impacts & Opportunities
Mining Within Zimbabwe’s Great Dyke: Extent , Impacts & Opportunities Authors: Gilbert Makore & Veronica Zano Published by: Zimbabwe Environmental Law Association (ZELA) Sponsored by: International Alliance on Natural Resource in Africa (IANRA) Authors: Gilbert Makore and Veronica Zano Editor: Muduso Dhliwayo Copyright: 2012. Zimbabwe Environmental Law Association (ZELA) This publication may be reproduced in whole or in part and in any form for educational or non-profit uses, without special permission from the copyright holder, provided full acknowledgement of the source is made. No use of this publication may be made for resale or other commercial purposes without the prior written permission of ZELA. Year of Publication: 2012 Available from: Zimbabwe Environmental Law Association (ZELA), No. 6 London Derry Road, Eastlea, Harare, Zimbabwe: Tel: 253381; 252093, Email: , Website: www.zela.org Zimbabwe Environmental Law Association International Alliance on Natural Resource in Africa International Alliance on Natural Resources in Africa MINING WITHIN ZIMBABWE’S GREAT DYKE: EXTENT , IMPACTS AND OPPORTUNITIES I Table of Contents Executive Summary: 1 The Great Dyke Mineral Belt: 2 Mining and Mining Development Contribution to Economic Growth: 5 Companies operating in the Great Dyke: 10 Communities along the Great Dyke: 12 Impacts of Mining on the Great Dyke Communities: 14 Recommendations: 19 Conclusion: 20 MINING WITHIN ZIMBABWE’S GREAT DYKE: EXTENT , IMPACTS AND OPPORTUNITIES ii Executive Summary The Great Dyke is a seam of ore-bearing rock that goes from the north to the south of Zimbabwe. The Dyke spans a total length of 550kms and has a maximum width of 11kms. This geological feature represents an important resource for Zimbabwe's national economy and the local communities' livelihoods. -
Media Release 23 September 2014 Letter to the Editor
Lonmin Plc 4 Grosvenor Place London SW1X 7YL United Kingdom T: +44 (0)20 7201 6000 F: +44 (0)20 7201 6100 Media Release www.lonmin.com 23 September 2014 Letter to the Editor - Mail and Guardian The M&G's story on Lonmin's historic tax affairs published on Friday 19 September 2014 contained significant inaccuracies and material omissions. Disappointingly, the lengthy answers provided to the M&G’s detailed questions were not reported. Any suggestion of potential illegality around Lonmin’s historic tax affairs is seriously damaging to the Company's reputation, not least because such allegations are wholly and absolutely false. The following facts and context, missing from the published article, are vital in judging its accuracy. 1. The Western Metal Sales (WMS) structure referred to was a structure not uncommon to old world conglomerates. The structure was in no way illegal and did not benefit Lonmin from a tax perspective as Lonmin remained liable for the payment of taxes in the UK arising from legitimate and reasonable commissions paid to Western Metal Sales. 2. This structure was changed in 2007 when Lonmin took a decision to move its marketing services to South Africa. 3. The move was based on cost concerns (having a company registered in Bermuda and operating out of London was expensive) and resulted in marketing personnel being based closer to Lonmin’s operations. 4. A transitional arrangement was put in place for 18 months and thereafter, from 1 October 2008, the marketing commission paid to Lonmin Management Services (LMS) was entirely taxable in South Africa.