Mineral resources of Alaska, report on progress of investigations in 1932. Past placer-gold production from Alaska

10.3133/b857b ◽  
1933 ◽  
Keyword(s):  
Mineral Resources ◽  
Gold Production ◽  
Placer Gold

scholarly journals Giant Placers of the Victorian Gold Province

SEG Discovery ◽  
2004 ◽  
pp. 1-18
Author(s):  
Martin J. Hughes ◽  
G. Neil Phillips ◽  
Stephen P. Carey
Keyword(s):  
Late Cretaceous ◽  
Quartz Vein ◽  
Late Eocene ◽  
Gold Deposits ◽  
Gold Production ◽  
Placer Gold ◽  
High Rainfall ◽  
Hydrothermal Quartz ◽  
Alluvial Gold ◽  
Primary Gold

ABSTRACT The Victorian gold province has yielded 2500 tonnes (t) Au, nearly 2 percent of cumulative world gold production, mostly mined between 1851 and 1910. Fifty-five percent (1375 t) was placer gold from modern and paleostream systems, and from eluvial deposits, and the remainder came from primary quartz vein-related deposits. Most of the alluvial gold placers are in unconsolidated or weakly cemented quartz pebble conglomerate and gravel, dominated by hydrothermal quartz, although a few paleoplacers are within duricrusted conglomerate that required crushing. Large and abundant gold nuggets were common. Placer gold deposits formed in three intervals following uplift in the Late Cretaceous, Late Eocene, and Pliocene. An important factor in the preservation of the paleoplacers has been their burial by younger sediments and basalt flows, with consequent protection from erosion and dispersal. Factors in the formation of the giant gold placers of Victoria include the following: (1) the existence of a major primary gold province with several multimillion-ounce gold deposits; (2) uplift and reactivation of older faults; and (3) high rainfall and deep Paleogene weathering.

The native gold extracted in the Amur Region for 150 years

2021 ◽  
pp. 57-62
Author(s):  
ANTON MELNIKOV ◽  
VALENTINE MOISEENKO ◽  
VITALY STEPANOV
Keyword(s):  
Native Gold ◽  
Amur Region ◽  
Gold Production ◽  
Sample Distribution ◽  
Placer Gold ◽  
Porphyry Deposits ◽  
Percentage Points ◽  
Gold Silver ◽  
Production History ◽  
Gold Sulfide

Data on gold production history and typomorphic features of native gold from the Amur province are provided. It is shown that about 1,116 t of primarily placer gold was extracted for 150 years, with primary gold accounting for 23,8 %. Placer gold sample distribution is unimodal with a maximum ranging within 850–925 ‰. Mercury prevails in microimpurities, its content in some clusters reaches the first percentage points. In terms of composition impurities, placer gold corresponds to gold from fields and occurences of gold-quartz and gold-sulfide-quartz formations. Low-fineness gold, (799–700 ‰) less common in placers, resulted from destruction of gold-silver unit sources while that of average fineness (800–900 ‰) was a result of the same process related to gold-polymetallic and gold-sulfide units. Gold-copper-molybdenum porphyry deposits do not form placers. The prospects of primary and placer gold production in the Amur region are defined.

Objective method for analysis of mineral resources supply on the example of Russia

2022 ◽  
pp. 6-21
Author(s):  
Irina Egorova ◽  
Boris Mikhailov
Keyword(s):  
Mineral Resources ◽  
Gold Deposits ◽  
Current Level ◽  
Objective Method ◽  
Geological Exploration ◽  
Resource Base ◽  
Gold Production ◽  
Mineral Production ◽  
Nickel Lead

A forecast of nonfuel mineral production in Russia is considered, based on the integration of the expected life of specific deposits currently exploited and developed. It is shown that mineral safety is fully ensured for copper, nickel, lead, tungsten and tin, whose reserves are sufficient for their extraction, at least at the current level, for 40–50 years and there are real prospects for its significant growth. The sufficiency of other minerals is much lower: for molybdenum and chromium, it is limited to about 30 years, and the extraction of zinc and uranium in Russia may significantly decrease in 20 years. The situation is more difficult with the most liquid solid minerals, like gold and diamonds. The commissioning of mining enterprises at the developed gold deposits can ensure a rapid growth in the production of the precious metal in the coming years. However, at the beginning of the next decade, the resource base depletion of the Olimpiada field and a number of other exploited deposits is predicted. The projects currently implemented for the development of new fields do not compensate for the lost capacity. This may account for a long-term (until the beginning of the 2050s) decline in the Russian gold production, which may be halved against the current level by the end of this period. Such a scenario can only be avoided with the intensification of geological exploration in the coming years. The earlier decrease in the number of diamonds mined in Russia, associated with the depletion of reserves of exploited pipes, is predicted (since 2025). Unless new deposits are discovered and developed, the domestic production of precious stones will steadily decline and, in the 2040s, may be reduced fourfold.

The Political Economy of Prehispanic Tarascan Metallurgy

1987 ◽  
Vol 52 (4) ◽  
pp. 741-752 ◽  
Author(s):  
Helen Perlstein Pollard
Keyword(s):  
Political Economy ◽  
Mineral Resources ◽  
The Political ◽  
Gold Production ◽  
European Contact ◽  
Archaeological Data ◽  
Complex Technology ◽  
Insight Into ◽  
Tarascan State

Tarascan metallurgy was not only a complex technology, but a significant marker of elite social status and a major source of wealth for the ruling dynasty. Reanalysis of ethnohistoric material, when coupled with new cartographic and archaeological data, provides insight into the structure and role of copper, silver, and gold production in the Protohistoric Tarascan State. The increasing political centralization of the Tarascan State in the last century before European contact resulted in the emergence of new forms of exploitation of mineral resources, tempered by the technological and transport constraints of a prehispanic civilization.

Public Administration in the Field of Subsoil Use and Protection in Ukraine

2019 ◽  
pp. 169
Author(s):  
Nadiia Maksimentseva
Keyword(s):  
Public Administration ◽  
Phenomenological Study ◽  
Inductive Reasoning ◽  
Mineral Resources ◽  
Selling Price ◽  
Administrative Functions ◽  
The People ◽  
European Court ◽  
And Performance ◽  
Incoming Energy

Laws and regulations backing and governing public administration in subsoil use and protection in Ukraine is gradually gaining priority and importance given incoming energy security and resource self-sufficiency risks alerts for the State as one of the warrants for political and economic independence and guarantees for the people of Ukraine to enjoy and plenipotentiary implement its propitiatory rights set forth in the Constitution of Ukraine with regard to natural resources and benefits that constitute the genuine wealth of the nation. The article is written with the application of inductive reasoning and performance of various research methods, such as case studies, phenomenological study with some focus on nature and source of laws and administrative functions, grounded theory study; also a deep comparative analysis of domestic and overseas legal patterns is carried out. The article is devoted to the research of problems with regard to public administration in the field of subsoil use and protection in Ukraine. The author emphasizes that determination of public administration in the field of subsoil use and protection is a form of public managerial activities of public administration authorities (state authorities, local self-government bodies, self-governing public organizations with the respective competence). It is suggested that these activities are aimed at implementation of the policies in the field of geological exploration of mineral resources, mineral extraction, construction of underground and terrestrial facilities not related to the extraction of minerals, subsoil and environmental protection and they are based on the principles of interaction between subject and object of public administration, discretion, mutual responsibility, self-governance and decentralization when public services are provided. Also, the article presents many judicial practice of the European Court of Human Rights and Citizen, the Supreme Court in the field of public administration in the field of subsoil use and protection. In concluding notes amendments to Subsoil Code of Ukraine, methodology for calculating the initial selling price for the sale of special permit, selection procedures for open special permit tender bid winners and responsibility for subsoil use abandonment costs are suggested by the author.

TRENDS IN MINERAL COMPLEX DEVELOPMENT AT THE TURN OF THE CENTUARY

2018 ◽  
pp. 3-15
Author(s):  
A. L. Dergachev ◽  
V. I. Starostin
Keyword(s):  
World Economy ◽  
Raw Materials ◽  
Supply And Demand ◽  
Mineral Resources ◽  
Strategy Of Development ◽  
Mineral Complex ◽  
Complex Development ◽  
Mineral Commodities ◽  
Working Out ◽  
Mineral Base

Important trends in development of world's mineral complex at the beginning of the 21st century are increase of supply and demand for mineral materials differentiated for various metals and nonmetallic mineral resources, regions and countries; concentration of production of mineral commodities in small number of countries; falling availability of economic reserves of raw materials for world economy even at current level of material extraction. The tendencies should be taken into account when working out strategy of development of Russian mineral base.

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