A5087524572- Geological and Geochemical Analysis
- Geochemistry and Geologic Mapping
- earthquake and tectonic studies
- High-pressure geophysics and materials
- Geological and Geophysical Studies
- Geological Studies and Exploration
- Hydrocarbon exploration and reservoir analysis
- Geochemistry and Elemental Analysis
- Geological formations and processes
- Paleontology and Stratigraphy of Fossils
- Mining Techniques and Economics
- Geology and Paleoclimatology Research
- Metal Extraction and Bioleaching
- Geological Modeling and Analysis
- Mineral Processing and Grinding
- Radioactive element chemistry and processing
- Geochemistry and Geochronology of Asian Mineral Deposits
- Advanced Materials Characterization Techniques
- Mining and Resource Management
- Geological and Geophysical Studies Worldwide
- Archaeology and Rock Art Studies
- Mineralogy and Gemology Studies
- Particle physics theoretical and experimental studies
- Geomagnetism and Paleomagnetism Studies
- High-Energy Particle Collisions Research
University of the Witwatersrand
2006-2024
University of Oxford
2015-2024
University of Johannesburg
2020-2024
Rutherford Appleton Laboratory
1981-1983
Preface. Introduction: Mineral Resources:. Introduction And Aims. What Makes A Viable Deposit?. Some Useful Definitions Compilations. Natural Resources, Sustainability Environmental Responsibility. Summary Further Reading. Part I: Igneous Processes:. 1. Ore-Forming Introduction. Magmas Metallogeny. Why Are More Fertile Than Others?...The 'Inheritance Factor'. Partial Melting Crystal Fractionation As Ore Forming Processes. Liquid Immiscibility An Process. Detailed Consideration Of...
Three principal granite provinces are defined across SE Asia, as follows. (1) The Western Thailand–Myanmar/Burma province consists of hornblende–biotite I-type granodiorite–granites and felsic biotite–K-feldspar (± garnet ± tourmaline) granites associated with abundant tin mineralization in greisen-type veins. New ion microprobe U–Pb dating results from Phuket Island show zircon core ages 212 2 214 Ma a thermal overprint rims 81.2 1.2 85–75 Ma. (2) North Thailand–West Malaya Main Range has...
Research Article| September 01, 2015 Petrogenesis of Malaysian granitoids in the Southeast Asian tin belt: Part 2. U-Pb zircon geochronology and tectonic model Samuel Wai-Pan Ng; Ng 1Department Earth Sciences, University Oxford, South Parks Road, Oxford OX1 3AN, UK †Current address: Department The Hong Kong, Pok Fu Lam Lam, Kong; waipanng@hku.hk. Search for other works by this author on: GSW Google Scholar Martin J. Whitehouse; Whitehouse 2Swedish Museum Natural History, Nordic Center...
Research Article| September 01, 2015 Petrogenesis of Malaysian granitoids in the Southeast Asian tin belt: Part 1. Geochemical and Sr-Nd isotopic characteristics Samuel Wai-Pan Ng; Ng 1Department Earth Sciences, University Oxford, South Parks Road, Oxford OX1 3AN, UK †Current address: Department The Hong Kong, Pok Fu Lam Lam, Kong; waipanng@hku.hk. Search for other works by this author on: GSW Google Scholar Sun-Lin Chung; Chung 2Institute Academia Sinica, Taipei 10529, Taiwan3Department...
Granitoid-hosted mineral deposits are major global sources of a number economically important metals. The fundamental controls on magma metal fertility tectonic setting, the nature source rocks, and differentiation. A clearer understanding these petrogenetic processes has been forged through accessory zircon, which considerable potential in metallogenic studies. We present an integrated zircon isotope (U-Pb, Lu-Hf, O) trace element dataset from paired Cu-Au (copper) Sn-W (tin) magmatic belts...
Abstract Lithium-cesium-tantalum–type pegmatites (the primary source of lithium) crystallize from highly evolved, volatile felsic melts that incorporated crustal material in their source. Pegmatites are classically thought to form either extreme fractionation a parental granite body or via low-degree partial melting metamorphic rock (anatectic origin). However, the processes lead formation economic lithium pegmatite deposits remain enigmatic, because precipitation ore minerals requires melt...
The Namaqualand Metamorphic Complex is a well-exposed, Mesoproterozoic, low-pressure, amphibolite–granulite-facies terrane flanking the Archaean Kaapvaal Craton of southern Africa. Previous isotopic dating in region suggests an ∼150 my period prograde granulite-facies metamorphism and episodic granite emplacementin mid-crust. In contrast, thermal modelling that sub- superjacent magmatic accretion should not have exceeded 30 duration. This enigma resolved by precise U–Pb zircon SHRIMP major...
Abstract Carlin-type gold deposits are one of the most important mineralization styles in world. Despite their economic importance and large volume work that has been published, there remain crucial questions regarding metallogenesis. Much this uncertainty is due to cryptic nature occurrence, with occurring as dispersed nanoscale inclusions within host pyrite rims formed on earlier barren cores. The small size made determining sulfides mechanisms by which they precipitated from ore fluids...
The Mogok Metamorphic Belt is a north–south-aligned belt of mainly high-grade metamorphic rocks and granites that extends the length Burma (Myanmar) along western margin Sibumasu block from Andaman Sea to East Himalayan (Namche Barwa) Syntaxis (Figs 12.1 & 12.2). host some world's finest rubies sapphires, former phlogopite + corundum marbles latter heterogeneous suite syenite charnockites intrude (Chhibber 1934 , b ; Iyer 1953; Searle Haq 1964; Bender 1983; Mitchell et al. 2007; Themelis...
Abstract Most known porphyry Cu deposits formed in the Phanerozoic and are exclusively associated with moderately oxidized, sulfur-rich, hydrous arc-related magmas derived from partial melting of asthenospheric mantle metasomatized by slab-derived fluids. Yet, whether similar metallogenic processes also operated Precambrian remains obscure. Here we address issue investigating origin, f O 2 , S contents calc-alkaline plutonic rocks Haib deposit Paleoproterozoic Richtersveld Magmatic Arc...
U-Pb ages of single detrital zircon grains from various stratigraphic horizons in the Dominion and Witwatersrand sequences provide constraints on maximum age sedimentation as well indicating pattern distribution (granitoid) source area providing detritus into basin. Zircon sediments range 3191-3105 Ma with a geometric mean (\documentclass{aastex} \usepackage{amsbsy} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{bm} \usepackage{mathrsfs} \usepackage{pifont} \usepackage{stmaryrd}...
Abstract The Mogok metamorphic belt (MMB) extends for over 1,000 km along central Burma from the Andaman Sea to East Himalayan syntaxis and represents exhumed lower middle crustal rocks of Sibumasu plate. In valley region, MMB consists regional high‐grade marbles containing calcite + phlogopite spinel apatite ± diopside olivine hosts world class ruby sapphire gemstones. coarse‐grained have been intruded by orthopyroxene‐ clinopyroxene‐bearing charnockite‐syenite sheet‐like intrusions that...
The Gaborone granite suite and the Kanye Formation formed during a single magmatic event in late Archean evolution of Kaapvaal craton, southern Africa, may be oldest rapakivi granite-anorthosite-rhyolite world. underlies an area >6000 km2 northwestern part craton comprises A-type granite, leucogranite, granophyric microgranite, minor anorthosite. It is partly surrounded by Formation, 1000-m-thick pile pyroclastic flow-banded rhyolitic lava. Precise U-Pb dating granitic components rhyolite...
Although the Au and U deposits of Witwatersrand basin are generally regarded as modified placer in origin, nature source area ultimate origin still remain a major enigma. A number domal outcrops Archean basement exposed hinterland, revealing presence diverse suite granitoids minor (<20%) greenstone belt component. In addition, samples from over 130 boreholes drilled adjacent to have revealed character subsurface beneath early Proterozoic sedimentary volcanic cover. The granitic is commonly...