scholarly journals THE VETROVAYAM VOLCANIC ROCKS AND THEIR ORE DISTRICT (SOUTH-WESTERN PART OF THE SOUTH-ESTERN KORYAK BELT)

2018 ◽  
Author(s):  
Г.П. Яроцкий ◽  
Х.О. Чотчаев
Keyword(s):  
Seismic Hazard ◽  
Volcanic Rock ◽  
Transition Zone ◽  
Gold Mining ◽  
Volcanic Rocks ◽  
Mining Company ◽  
Lode Gold ◽  
Gold Silver ◽  
Orogenic Belts ◽  
Ore District

В Корякском нагорье ярко проявлен прирост континента рядом вулканических северо-восточных орогенных поясов. Они лежат в Морской транзитали литосферы южной окраины СВ Азии и вмещают золото, серебро, самородную серу, медь. Пояса обособлены по простиранию отдельными вулканогенами, которые являются тектоно-магматическим субстратом рудных таксонов. Описан Ветроваямский вулканоген с его элементами системы «тектоника-минерагения» рудного Ильпинского района. Доказано положение вулканогена на тектоническом своде воздымающейся глыбы литосферы, заключённой поперечными межглыбовыми разломами. К востоку от вулканогена лежит территория сильных землетрясений Хаилинского и Олюторского (1991 и 2006 гг.), что определяет вероятную сейсмоопасность для возникающего в районе горнодобывающего предприятия по добыче рудного золота. Certain NE volcanic orogenic belts have contributed into emergence within the Koryak highlands. They are located in the sea transition zone of the lithosphere within the southern margin of NE Asia and host gold, silver, native sulphur, and copper. The belts are isolated along the strike by certain volcanic rocks that are tectonic-magmatic substance for ore taxons. The article describes the Vetrovayam volcanic rocks with their elements of tectonic-minerageny system in the Ilpinsky ore district. The paper provides evidence that the volcanic rocks are located on the arch of rising lithospheric block enclosed by transversal interblock faults. East of the volcanic rock there is a zone of the strong 1991 Khailinsky and 2006 Olyotorsky earthquakes, which allows to suppose probable seismic hazard to developing lode gold mining company constructed in that zone

scholarly journals EFEKTIVITAS PENYIDIKAN TINDAK PIDANA PENAMBANGAN EMAS TANPA IZIN DI KABUPATEN SOLOK SELATAN (Studi pada Direktorat Reserse Kriminal Khusus Kepolisian Daerah Sumatera Barat)

2018 ◽  
Vol 1 (2) ◽  
pp. 134-147
Author(s):  
Darmadi Prapto Pamungkas
Keyword(s):  
Law Enforcement ◽  
Government Regulation ◽  
Gold Mining ◽  
Secondary Data ◽  
Primary Data ◽  
Mining Company ◽  
Mineral Mining ◽  
Gold Silver ◽  
The Rich ◽  
The Government

Indonesia is the rich country of mine, such as gold, silver, petroleum, mine, etc. Management of mine should be done by government or private. Every mining company obligated to get license as regulated in the Regulation Number 4 Year 2009 about Mineral Mining Juncto the Government Regulation Number 23 Year 2010 about the Implementation of Mineral Mining. In fact, not all companies have license. There are so many companies operate illegal. One of them is gold mining without license (PETI). The specification of the research is descriptive analytic. The methods used are normative as primary approach and juridical empiric method as secondary approach. The sources of data are secondary and primary. The techniques of collecting data uses field study by interviewing for the primary data and library study for the secondary data. Then, the data analyzed qualitatively in descriptive qualitative form. From the research results obtained several conclusions: First, the effective of investigation gold mining without license by Directory of Reserve Special Criminal of West Sumatera Police based on the data got can be seen clearly effective because from 3 (three) cases all has been investigation and submitted to Court. Second, the obstacles faced by Directory of Reserve Special Criminal of West Sumatera Police in executing of gold mining without license (PETI) in South Solok Regency consist of: (a) no synergy in supporting the law enforcement together between instances and other because the agents of gold mining without license (PETI) are backed up by law enforcer, government until traditional viewers; and (b) limited tool such as no double garden cars or boat to reach field and no communication satellite which can be operated in the unreached location by phone signal.

scholarly journals Maintaining Mutual Benefits between Investor and Local Community: Mechanisms to Reopen Lega Dambi Gold Mining, Ethiopia

2021 ◽  
Vol 2 (1) ◽  
pp. 55-81
Author(s):  
Abdisa Olkeba Jima
Keyword(s):  
Corporate Social Responsibility ◽  
Social Responsibility ◽  
Large Scale ◽  
Gold Mining ◽  
Local Community ◽  
Local Communities ◽  
Mining Operations ◽  
Mining Company ◽  
Social License ◽  
Corporate Social

Mining, specifically, large-scale gold mining has become one of the primary economic activities that play a pivotal role in the socio-economic development of one country. But there is no consensus among scholars whether gold mining companies maintain mutual benefits with local communities. The main objective of this research is to scrutinize the mechanism to be employed in reopening Lega Dambi large-scale gold mining by maintaining mutual benefits between the company and the local community. The researcher employed a qualitative method and a case study research design. Focus group discussions and semi-structured interviews were used to collect data from the local community, elders, religious leaders, Abbaa Gadaas, Guji Zone, and Odo Shakiso Woreda investment office, land management office, social and labor affair, mineral, and energy office administrators, and Odo Shakiso Woreda health station and Adola hospital. Secondary sources and regulatory frameworks such as FDRE Constitution and Mining Operations Proclamation No. 678/2010 were used to triangulate with primary data. The finding shows that Lega Dambi's large-scale gold mining company failed to maintain mutual benefits between itself and the local community. Basic tenets such as national and regional corporate social responsibility, community development agreement, impact and benefit agreements, social and labor plan, and social license were not implemented properly to balance the mutual benefit between the company and the local community. The researcher concluded that Lega Dambi large-scale gold mining company disregarded the role of the local community during commencement time albeit it had a strong relationship with the central government. Consequently, the company was terminated because of a bad relationship it had with the local community. It is recommended that national and regional corporate social responsibility that shows the company’s specific joint administration of the central and Oromia region governments should be designed and implemented fully. It is also recommended that discussions should be held with local communities and arrived at a consensus concerning the reopening of the company.

Chapter 21: Geology of the Fruta del Norte Epithermal Gold-Silver Deposit, Ecuador

2020 ◽  
pp. 431-450
Author(s):  
Stephen Leary ◽  
Richard H. Sillitoe ◽  
Jorge Lema ◽  
Fernando Téliz ◽  
Diego Mena
Keyword(s):  
Base Metal ◽  
Late Jurassic ◽  
Volcanic Rocks ◽  
Silver Deposit ◽  
Epithermal Gold ◽  
Mountain Ranges ◽  
The North ◽  
Pull Apart Basin ◽  
Gold Silver ◽  
A Minor

Abstract Fruta del Norte is a completely concealed and extremely well-preserved, Late Jurassic epithermal gold-silver deposit of both low- and intermediate-sulfidation type, which is located in the remote Subandean mountain ranges of southeastern Ecuador. Currently defined indicated resources are 23.8 million metric tons (Mt) averaging 9.61 g/t Au and the total endowment is 9.48 Moz Au. The deposit, notable for the widespread occurrence of visible gold and bonanza grades, will be bulk mined underground. Fruta del Norte was discovered in 2006 during greenfield exploration and systematic drill testing of a conceptual geologic model, which predicted that auriferous veins would occur in andesitic volcanic rocks inferred to underlie a zone of arsenic- and antimony-anomalous silicification in fluvial conglomerate. The host andesitic volcanic rocks, crosscutting feldspar porphyry, and associated phreatic breccia are part of a roof pendant in the Zamora batholith. Together, they are products of a continental-margin volcanoplutonic arc of Middle to Late Jurassic age. The deposit lies beneath the northern extremity of the ~16-km-long, Suárez pull-apart basin where it is localized by steep, second-order faults within the regionally extensive Las Peñas strike-slip fault zone. The pull-apart basin was progressively filled by fluvial conglomerate, dacitic ignimbrite, finer grained siliciclastic sedimentary rocks, and, finally, andesite flows. The Fruta del Norte deposit comprises a 1.3-km-long and up to >300-m-wide vein stockwork associated with quartz-illite-pyrite alteration. The deposit comprises two principal vein types, one in the south dominated by quartz, manganoan carbonates, and abundant base metal sulfides and the other in the north dominated by manganese- and base metal-poor quartz, chalcedony, and calcite. Adularia is a minor gangue mineral in both. Both vein types are abruptly transitional upward and westward to a third important ore type characterized by intense silicification and chalcedony veining, with disseminated and veinlet marcasite (± pyrite). An extensive silica sinter horizon directly overlies the andesitic rocks and/or occurs as interbeds in the lowermost 20 m of the conglomerate and, consequently, is in unusual proximity to the underlying gold-silver orebody. Much of the conglomerate lacks silicification except for a narrow, steeply inclined zone exposed above the deposit, which led to its discovery.

scholarly journals Study of promises for the use of ultrasound in the technology of secondary benefication of processing wastes

2018 ◽  
Vol 56 ◽  
pp. 03015
Author(s):  
Olga Voronova ◽  
Lidiya Kienko
Keyword(s):  
Operating Regime ◽  
Raw Material ◽  
Preliminary Treatment ◽  
Flotation Reagents ◽  
Mining Company ◽  
Mineral Particles ◽  
Processing Wastes ◽  
Sample Testing ◽  
Fluorite Content ◽  
Ore District

The results of the study, aimed at designing of benefication technology of mine processing wastes of Voznesenskiy ore district, are presented in this paper. By the expert appraisals, the amount of tailings dumps of the Yaroslavskaya Mining Company is estimated to be more than 30 million tons. Sample testing has shown that fluorite content varies from 13% to 23%, calcite - up to 14%, and zinc - in the range of 0.4-0.6%. The research was conducted with tailing samples containing 20.7% of CaF2 and 10.2% of CaCO3. Mineral grains of the secondary raw material were examined for their surface state and a package of necessary preliminary operations, which provide an efficient material - flotation reagents interaction, was determined. It has been established that extraction of fluorite to concentrates that would match existing requirements is possible in principle. The use of ultrasonic treatment of material in its preparation for flotation is conditioned by an effective desorption of films of different nature from mineral particles. The suggested scheme of fluorite flotation involves preliminary treatment of raw material by ultrasound with dumping of released mud fractions. The optimal operating regime allows obtaining concentrates of higher quality than it is under usual technology without the ultrasonic exposure. In this process, the extraction of fluorite to a concentrate with 94.47% of CaF2 increases up to 61.11%, which is higher by 2.96% against the original studies.

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