Results 261 to 270 of about 33,890 (308)

Origin of placer gold nuggets and history of formation of glacial gold placers, Gold Creek, Granite County, Montana

Economic Geology, 1994
Placer gold along the upper portions of Gold Creek, near Deer Lodge, Montana, occurs in Pliocene(?) fossil alluvial placers, Pleistocene till, and alluvium. The upper Gold Creek placers yielded an estimated 175 to 200 kg gold during 1890 to 1990. The gold probably originated in veins, skarn, or replacement deposits in Paleozoic and Mesozoic sedimentary
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Gold-ore and placer occurrences on Kamchatka

International Geology Review, 1971
Late Miocene epithermal gold-silver analogues of the Far Eastern and Zabaykalian deposits and analogues of the Kolyma and Lena placers in Kamchatka, alongside other evidence, are indications of a high gold potential of the territory, here recommended as a new raw materials base for the Soviet gold industry.
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A Placer-Gold Evaluation Exercise

Journal of Geological Education, 1984
An interesting application of applied geology is the location and evaluation of mineral deposits. This particular lab exercise allows the students to individually simulate the process of locating a placer gold paystreak on their own mining claim. Incorporated within the exercise is the arithmetic of computing the total value of the gold on the claim ...
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Ancient placer gold deposits

1991
In this chapter, ancient placers refer to deposits of Archaean and early Proterozoic age. Because each deposit may cover hundreds of square kilometres, they present economically attractive exploration targets. Individual ancient placer deposits like the Steyn/Basal placer in the Welkom goldfield of South Africa have produced in excess of 4500 t (metric
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Application of placer gold morphology to gold exploration

2017
Placer gold undoubtedly carries some of the features of endogenous gold. The physical and chemical characteristics of such gold are influenced by many factors: the nature of the primary gold, the water force, the morphology of the river bed, the length of transport and the chemical composition of the water in the river. In the Republic of Macedonia has
Stefanova, Violeta, Stojanova, Violeta, Sijakova-Ivanova, Tena   +2 more
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The Use of Typomorphic Features of Placer Gold of the Anabar Region for Determining Its Sources

Minerals (Basel, Switzerland), 2023
Boris Gerasimov
exaly  

Criteria for Determining the Genesis of Placers and Their Different Sources Based on the Morphological Features of Placer Gold

Minerals (Basel, Switzerland), 2021
Zinaida Nikiforova
exaly  

Internal Structures of Placer Gold as an Indicator of Endogenous and Exogenous Processes

Minerals (Basel, Switzerland), 2023
Zinaida Nikiforova
exaly  

Morphological and compositional analysis of alluvial gold: The Fresnedoso gold placer (Spain)

Ore Geology Reviews, 2020
Juan Gomez Barreiro
exaly  

Typomorphic Features and Source of Native Gold from the Sykhoi Log Area Placer Deposits, Bodaibo Gold-Bearing District, Siberia, Russia

Minerals (Basel, Switzerland), 2023
A V Lalomov
exaly