scholarly journals Biological and Geochemical Development of Placer Gold Deposits at Rich Hill, Arizona, USA

Minerals ◽  
2018 ◽  
Vol 8 (2) ◽  
pp. 56 ◽  
Author(s):  
Erik Melchiorre ◽  
Paul Orwin ◽  
Frank Reith ◽  
Maria Rea ◽  
Jeff Yahn ◽  
...  
Keyword(s):  
Gold Deposits ◽  
Placer Gold

scholarly journals Information and computational GIS for monitoring the natural and technical systems of placer gold deposits

2021 ◽  
Vol 895 (1) ◽  
pp. 012036
Author(s):  
V I Usikov ◽  
Y A Ozaryan
Keyword(s):  
Remote Sensing ◽  
Information Technologies ◽  
Precious Metals ◽  
Gold Deposits ◽  
Raw Material ◽  
Expert Assessment ◽  
Labor Costs ◽  
Resource Base ◽  
Placer Gold ◽  
Geological Information

Abstract It is known that nowadays one of the main problems of mining is the depletion of reserves. The researchers consider mining waste as a source of replenishment of the resource base. Disputes on the prospects for technogenic raw material processing are becoming especially relevant. The object of research chosen by the authors in this article is the technogenic neoplasms resulting from dredging and hydraulic processing of placer gold. The paper presents the results of assessing the prospects and application of the information technologies, in particular, the analysis of data from remote sensing of the Earth in the design and organization of work to involve technogenic placers in operation. It is shown that these technologies are able to increase the efficiency of work and reduce labor costs at the stage of preliminary study of potential development targets. Technogenic complexes of depleted fields are a significant reserve of the mineral resource base of gold and other precious metals. This paper presents the results of the creation of a method for expert assessment of spatial and volumetric indicators of technogenic complexes of alluvial fields and other landscape objects using remote sensing of the territory and analysis of geological information. The Kerbinsky gold-bearing region of the Khabarovsk Region was chosen as the object of research.

scholarly journals Typomorphic Features of Placer Gold from the Billyakh Tectonic Melange Zone of the Anabar Shield and Its Potential Ore Sources (Northeastern Siberian Platform)

Minerals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 281
Author(s):  
Boris Gerasimov ◽  
Vasily Beryozkin ◽  
Alexander Kravchenko
Keyword(s):  
Native Gold ◽  
Gold Mineralization ◽  
Coarse Fraction ◽  
Gold Deposits ◽  
Primary Sources ◽  
The Arctic ◽  
Geochemical Data ◽  
Placer Gold ◽  
Anabar Shield ◽  
Tectonic Mélange

Precambrian shields and outcropped Precambrian rock complexes in the Arctic may serve as the most important sources of various types of mineral raw materials, including gold. The gold potential of the Anabar shield in the territory of Siberia has, thus far, been poorly studied. A number of primary and placer gold occurrences have been discovered there, but criteria for the prediction of and search for gold mineralization remain unclear. The main purpose of this paper was to study the typomorphic features of placer gold in the central part of the Billyakh tectonic mélange zone in the Anabar shield and to compare them to mineralization from primary sources. To achieve this, we utilized common methods for mineralogical, petrographic, and mineragraphic analyses. Additionally, geochemical data were used. As a result of this investigation, important prospecting guides were identified, and essential criteria for the prediction of and search for gold deposits were elucidated. The characteristics of the studied placer gold were specific for gold derived from a proximal provenance. These characteristics included the poor roundness of the native gold grains, a cloddy–angular and dendritic form, an uneven surface, and a high content of coarse-fraction native gold (0.5–2 mm), which was as high as 24% of the volume of analyzed native gold. In addition, we conducted a study on the mineralogical features of the gold-sulfide mineralization that was disseminated throughout a small exposure area of paleo-Proterozoic para- and orthogneisses in the Anabar shield basement. A comparison of mineral inclusions in the coarse-fraction native gold and mineral assemblages in the ore deposits showed that one of the possible primary sources for placer gold might be small bodies of metasomatically altered orthogneisses associated with large granitoid plutons.

Indicative features of placer gold for the prediction of the formation types of gold deposits (east of the Siberian Platform)

2018 ◽  
Vol 59 (10) ◽  
pp. 1318-1329 ◽  
Author(s):  
Z.S. Nikiforova ◽  
B.B. Gerasimov ◽  
E.G. Glushkova ◽  
A.G. Kazhenkina
Keyword(s):  
Siberian Platform ◽  
Gold Deposits ◽  
Placer Gold

Typomorphic features of placer gold of Vagran cluster (the Northern Urals) and search indicators for primary bedrock gold deposits

2017 ◽  
Vol 85 ◽  
pp. 321-335 ◽  
Author(s):  
A.V. Lalomov ◽  
R.M. Chefranov ◽  
V.A. Naumov ◽  
O.B. Naumova ◽  
W. LeBarge ◽  
...  
Keyword(s):  
Gold Deposits ◽  
Placer Gold ◽  
Northern Urals

Ensuring of environmental safety in the reclamation of anthropogenic placer gold deposits in the North of Khabarovsk Krai

2014 ◽  
Vol 84 (13) ◽  
pp. 2624-2631 ◽  
Author(s):  
O. O. Panfilov ◽  
D. A. Golubev ◽  
L. T. Krupskaya ◽  
V. A. Morin ◽  
K. E. Gula
Keyword(s):  
Environmental Safety ◽  
Gold Deposits ◽  
Khabarovsk Krai ◽  
Placer Gold ◽  
The North

Climate-induced geochemical and morphological evolution of placer gold deposits at Rich Hill, Arizona, USA

2016 ◽  
Vol 129 (1-2) ◽  
pp. 193-202 ◽  
Author(s):  
Erik B. Melchiorre ◽  
George D. Kamenov ◽  
Chelsea Sheets-Harris ◽  
Alexandre Andronikov ◽  
W. Britt Leatham ◽  
...  
Keyword(s):  
Morphological Evolution ◽  
Gold Deposits ◽  
Placer Gold
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