alluvial platinum deposits in nz

  • Noble Metals | Article about Noble Metals by The Free ...

    In the early 19th century, bucket dredgers were used to obtain gold and platinum from submerged alluvial deposits, and in 1870 a dredge was used for this purpose in New Zealand. Since the second half of the 19th century, deep alluvial deposits in Russia have been exploited by underground techniques, and excavators and scrapers were introduced ...

  • Mining

     · Considerable potential for platinum and platinum-group metals from hard-rock deposits and alluvial concentrations existed, the most promising area being the Longwood Range, in western Southland. Uranium-bearing minerals have been located on the South Island.

  • Alluvial gold along the northeast Otago margin

    Yellow localities are historic alluvial gold mines in quartz gravel deposits. The Kyeburn deposits are Eocene (~40 million years old) and the others are Miocene (~20 million years old). Gold eroded from the vein systems and altered schist, such as the deposits at Oturehua and Macraes, accumulated with eroded quartz in old river channels.

  • Placer formation

     · Eluvial gold deposits are mined in Australia, New Zealand, USA, South America etc.• In India wolframite and kyanite are mined as eluvial deposits. 23. Fig 1.5 Famous Australian gold nuggets (Eluvial gold deposite) 24. Stream or Alluvial placer Formation• Stream placers are by far the most important type of placer deposits.

  • Archives New Zealand || Goldmining in the coromandel

    Goldmining in the Coromandel. Alluvial gold was first discovered in the Coromandel in the 1850s, and the area was declared a goldfield in 1862 following the discovery of gold-bearing quartz. The Warden''s Offices were responsible for the local management of gold mining. Their responsibilities included the resolution of disputes, allocation of ...

  • New Zealand''s minerals

    Tectonic history New Zealand contains a wide variety of mineral deposits both onshore and offshore that reflect its dynamic tectonic history.. New Zealand''s ongoing tectonic deformation and metamorphism, diverse volcanic complexes, active geothermal systems, and classic schist belts provide a natural laboratory for the processes and controls involved in ore formation.

  • The Discovery of the World''s Greatest Platinum Resources

    "This alluvial platinum must come from some­ ... American deposits ... Australia and New Zealand without success, but an entirely new era was now about to open. Rumours of platinum being found in South Africa had begun to circulate in 1923 and had alerted a number of prospectors. Then in June 1924 a …

  • PNG alluvial gold mining start-up seeks directors

     · A START-UP mining company, focusing initially on alluvial gold in Papua New Guinea, is looking for the right people to get things up and running. Gryphon Minerals and Energy Melanesia intends to use the proceeds from alluvial gold production to provide the cash flow to explore for hard rock gold, base and platinum group metal deposits in the ...

  • Platinum potential of the Pacific Rim in connection with ...

    FIG 1 - Location of UA-type platinum deposits around Pacific Rim The key economic importance of UA intrusions is the existence of metallic platinum (mainly isoferroplatinum). Being very dense and resistant to erosion, metallic platinum can form rich placers as the intrusion erodes. The most productive alluvial platinum deposits in the world are

  • Platinum deposits of Ethiopia | Economic Geology ...

    Platinum occurs in small amounts in the dunite core of a basic intrusive complex in the Yubdo district, western Ethiopia, and in exploitable quantities in the lateritic clays overlying the dunite and its weathering product, a hard brown rock consisting chiefly of silica and iron oxides (birbirite), and in alluvial gravels along the present and former courses of the Birbir and tributary streams.

  • Platinum

    A silvery white, metallic element. Platinum is found as fine grains of native ore in alluvial Gold deposits and in Nickel ores. It is often mixed with other platinum group metals such as iridium, osmium, and palladium. The abundance of platinum in the earth''s crust is 0.01 ppm.

  • Platinum Facts

    The melting point of platinum is 3,215 °F (1,768.4 °C) and the boiling point is 6,917 °F (3,825 °C). Native deposits of platinum are rare and difficult to locate, South Africa accounts for 80% of the worlds production. Alluvial deposits are also mined from the Ural Mountains, Russia.

  • Alluvial Gold Mining

    Alluvial Gold Mining or River Gold Mining. We covered some of the basics of alluvial gold mining in Prospecting For Gold that we shall not revisit here. Instead we will look at more techniques of the river gold miner. Once you have established a good location for mining alluvial gold you want to process as much material as quickly as you can, with as little effort as you can.

  • Placer Gold Deposits of New Mexico

    deposits is given for each district. Most placer gold deposits in New Mexico are derived from gold-bearing mineralized areas in Tertiary intrusive rocks, and occur in gravels of alluvial fans, gulches, and rivers adjacent to the source. A few deposits are derived from gold-bearing Pre-

  • Public prospecting in the North Island

     · New Zealand Gold Prospecting & Metal Detecting Forums Archive ... Or are the claims made by members of this group, who allow alluvial panning in their claim areas? I''m particularly interested around Taihape. I''m thinking of moving there, and note that there was some historic alluvial finds 15 km NE of Taihape.

  • Photos of Natural Platinum Ore, Platinum and Palladium ore ...

    In the alluvial deposits of the Urals, platinum is sometimes found associated with gold, and sometimes without gold. It is noteworthy that platinum is an original mineral formed in some peridotites; and in the Urals, where no gold occurs in the platinum-bearing gravels, these gravels can be seen to have been derived from peridotite or ...

  • GEM DEPOSITS ALONG THE SARA RIVER, NEW ENGLAND NSW …

     · gem deposits along the sara river, new england nsw australia LIST OF ALL BLOG ENTRIES AND RELEVANT VIDEOS This area is one of the most interesting gem producing regions in New South Wales.

  • Colombia Exploration Sampling Update – Company ...

     · Exumax own and have imported special purpose alluvial mining equipment from New Zealand, where such operations are common, for use in low-cost alluvial extraction projects focused on precious metals. Exumax have operated a series of alluvial projects in Colombia and prioritise community relations and environmental management work as key ...

  • Placer deposit | geology | Britannica

    Placer deposit, natural concentration of heavy minerals caused by the effect of gravity on moving particles. When heavy, stable minerals are freed from their matrix by weathering processes, they are slowly washed downslope into streams that quickly winnow the lighter matrix. Thus the heavy minerals

  • How To Find Alluvial Gold Deposits | Technology Industry ...

    Apr 30, 2017 - Data mining and Gold mine, Mining Industry and Techniques Mineral Ore Processing And Technology Processing Gold, Silver, Copper

  • Gold

    Australia, in 1869. New Zealand''s largest nugget was the 3 kg "Honourable Roddy" found at Ross in 1909. Formation Gold is formed in a wide variety of hydrothermal deposits, which may be eroded and the gold concentrated by hydraulic processes in rivers and on beaches, and deposited as sedimentary placer deposits. In hydrothermal deposits, gold

  • Platinum Nuggets Platinum Placer Deposits

    In New Zealand the placers of the River Tayaka are Also very similar to those of the Urals; they contain osmium and iridium as well as platinum, and are derived directly from peridotites. At the Ruwe gold mine, in the Tanganyika district of Africa, recent alluvial deposits and certain sandstones carry gold, platinum, and palladium, but so far ...

  • Where to find platinum nuggets

     · If you want to learn to find platinum nuggets, watch this video! In this video I talk about where to find alluvial placer platinum nuggets in the USA and aro...

  • Platinum Mining and Refining | Education

    Alluvial platinum deposit in the far eastern Koryak region of Russia. Over the past ten years, significant quantities of platinum have been produced from two alluvial deposits in the far eastern region of Russia: the Kondyor mine in Khabarovsk region and the Koryak mine in Kamchatka. Together these two operations produced 185,000 oz of platinum ...

  • Where you find it – Te Ara Encyclopedia of New Zealand

    high-grade coking coal deposits. The Nelson, Marlborough and West Coast regions feature platinum group metals. New Zealand''s coastline offers 800km of large scale iron and mineral sand deposits. Combined with how easy we make it to do business, these opportunities make New Zealand an exciting place to invest. THE CORE STORE

  • WO2014100858A1

    Disclosed herein is a remote operating vehicle (ROV) for use in a subterranean mining process, such as to extract material from beneath a rock layer. The ROV may be provided as a number of components each including their own umbilical cord. Each of the components may be lowered through a borehole and assembled together to form the ROV underground.

  • alluvial deposit

    The Manawatu region of New Zealand consists largely of alluvial deposits which form extensive unconfined aquifers. WikiMatrix. Metallic iridium is found with platinum and other platinum group metals in alluvial deposits. OpenSubtitles2018.v3. Here, in Sarawak, we extract gold from alluvial deposits…

  • Mineral resource assessment of the West ...

    Mineral resource assessment of the West Coast Region, New Zealand A.B. Christie R.G. Barker R.L. Brathwaite GNS Science Report 2010/61 November 2010

  • platinum mining, mining of platinum, platinum, platinum ...

    Consequently, platinum is often found chemically in pure state. Though it occurs naturally in the alluvial sands of various rivers, it was first used by pre-Columbian South American citizens. Later it was referenced in European writings in the early 16th century. Credit for the modern rediscovery of platinum is given to Antonio de Ulloa. HISTORY :

  • Alluvial and Placer Mineral Deposits | Geology for Investors

     · Alluvial is the name for placer deposits formed by water action in a stream or river. For most people, it''s all about alluvial deposits, or to be blunt, the allure of gold, with the odd precious and semi-precious gem thrown into the mix. You can still become an amateur gold or gem miner. You''re not going to wake up one morning, pack up the ...

  • Transport-related mylonitic ductile deformation and shape ...

     · Detrital gold for this study was obtained from placer concentrations in Pleistocene-Holocene fluvial sediments in the Otago placer goldfield of southern New Zealand (Figs. 1a–d; 2a–d; 3a–e).The basement for the goldfield is the Otago Schist belt, which hosts Cretaceous orogenic (hydrothermal) gold deposits including the world-class Macraes mine in the Hyde-Macraes Shear …

  • Deep Sea Minerals and Mining in the Pacific Islands region

    - Alluvial Mining: PNG, Solomon Islands - Underground mining: e.g. Vatukoula Gold Mine, Fiji - Open pit: e.g. Ok Tedi Copper Mine, PNG; Gold Ridge, Solomon Islands. • Marine mining is a relatively new method of developing mineral deposits and ongoing since the 1960s; • Deep sea mining is a new frontier in mineral development.

  • Alluvial | Article about alluvial by The Free Dictionary

    20 June 2014 - UK metal exploration and development company Eurasia Mining plc (LON:EUA) said today its Eurasia Investments Ltd (EIL) unit had agreed to buy the 50% in Urals Alluvial Platinum Ltd (UAP) it does not already own from its joint venture partner Rustenburg Platinum Mines (Cyprus) Ltd (RPM), to become full owner of the company.

  • Compositional variations and morphological evolution in ...

     · Ashley P, Craw D, MacKenzie D, Rombouts M, Reay A (2012) Mafic and ultramafic rocks, and platinum mineralisation potential, in the Longwood Range, Southland, New Zealand. NZ J Geol Geophys 55:3–19. Article Google Scholar Auge T, Legendre O (1992) Pt-Fe nuggets from alluvial deposits in eastern Madagascar.

  • Alluvial Fans

    An alluvial fan is a build up of river or stream sediments which form a sloping landform, shaped like an open fan or a segment of a cone. Flooding on alluvial fans can be damaging as the fans have steeper gradients than river floodplains. Alluvial fan activity near Flaxmill Creek, Makarora East. They typically occur near the boundary between ...

  • Mining in New Zealand

    Mining in New Zealand began when the Māori quarried rock such as argillite in times prior to European colonisation. Mining by Europeans began in the latter half of the 19th century.. New Zealand has abundant resources of coal, silver, iron ore, limestone and gold ranked 22 in the world in terms of iron ore production and 29th in gold production. The total value of mineral production in New ...