Geophysical exploration for epithermal gold deposits: Case studies from the Hishikari Gold Mine, Kagoshima, Japan

1995 ◽  
Vol 26 (2-3) ◽  
pp. 78-83 ◽  
Author(s):  
Kazuya Okada
Keyword(s):  
Case Studies ◽  
Gold Deposits ◽  
Gold Mine ◽  
Epithermal Gold ◽  
Geophysical Exploration

Application of high resolution airborne geophysics to epithermal gold exploration in Northeast Queensland and Coromandel, New Zealand

1989 ◽  
Vol 20 (2) ◽  
pp. 99 ◽  
Author(s):  
S.S. Webster ◽  
R.W. Henley
Keyword(s):  
High Resolution ◽  
Regional Scale ◽  
Cost Effective ◽  
Gold Deposits ◽  
Ore Deposits ◽  
Magnetic Data ◽  
Mapping Technique ◽  
Epithermal Gold ◽  
Airborne Geophysics ◽  
Airborne Geophysical Data

High resolution airborne geophysical data over broad areas have been found to optimize exploration for epithermal gold deposits in differing geological environments.Genetic exploration models may be tested in favourable sites by the recognition of geophysical signatures. These signatures reflect structural, lithological and alteration patterns arising from controls on ore deposits and can be applied at regional or detailed scales, using the same data set.At regional scale (e.g. 1:100,000) the magnetic data reflect the regional tectonics and divide the area into domains for the application of appropriate genetic models. At prospect scale (e.g. 1:25,000) the radiometric data allow the extrapolation of poorly outcropping geology to provide a cost-effective mapping technique. The magnetic data can be used to supplement this interpretation or can be used to target deeper sources for direct investigation by drilling.

Laumontitization as an exploration indicator of epithermal gold deposits : A case study of the axi and other epithermal systems in West Tianshan, China

2003 ◽  
Vol 22 (4) ◽  
pp. 289-301 ◽  
Author(s):  
Chen Yanjing ◽  
Bao Jingxin ◽  
Zhang Zengjie ◽  
Chen Huayong ◽  
Liu Yulin
Keyword(s):  
Gold Deposits ◽  
Epithermal Gold

scholarly journals Three implications of political ontology for the political ecology of conservation

2019 ◽  
Vol 26 (1) ◽  
pp. 545 ◽  
Author(s):  
Dimitrios Bormpoudakis
Keyword(s):  
Nature Conservation ◽  
Political Ecology ◽  
Case Studies ◽  
The Political ◽  
Gold Mine ◽  
Political Ontology ◽  
Ontological Turn

<p>Within political ecology, an important and timely critique has emerged which questions ontology and the nature of reality. This turn to ontology has been expressed in a new and influential paradigm, Political Ontology. In this article, I interrogate the politics of three tenets that seem central to  this  ontological  turn  within a political ecology of conservation context: (a) the insistence on the local, Indigenous and homogeneous subject and its corollary, the homogeneous Modern, Western subject; (b) the hegemony of the (green) neoliberal project, and (c) the incommensurability of non-modern and Western ontologies. I base my arguments on two case studies of resistance and/or struggle against green and un-green grabbing, the Skouries gold mine in Greece and the Lodge Hill development in England.</p><p><strong>Keywords</strong>: political ontology, neoliberal nature, conservation, Indigenous, Greece, England</p>

Case Studies of Wetland Filtration of Mine Waste Water in Constructed and Naturally Occurring Systems in Northern Australia

1994 ◽  
Vol 29 (4) ◽  
pp. 257-265 ◽  
Author(s):  
B. N. Noller ◽  
P. H. Woods ◽  
B. J. Ross
Keyword(s):  
Waste Water ◽  
Case Studies ◽  
Mine Waste ◽  
Waste Rock ◽  
Typha Domingensis ◽  
Gold Mine ◽  
Northern Australia ◽  
Runoff Water ◽  
Naturally Occurring ◽  
Mine Sites

A problem common to mines operating in the tropics is the disposal of water, which may be alkaline, acidic, or contain toxic elements such as arsenic or cadmium. The availability of year-round water supply at many mine sites in Northern Australia, particularly from pit dewatering, together with the monsoonal climate, provide appropriate conditions for the formation of natural wetlands or establishment of artificial wetlands. Wetland species (particularly Typha spp.) flourish in the presence of flowing or shallow water from dewatering, and data collected from natural and experimental wetlands show reduction of metal concentrations by wetland filtration of mine waste water. The following case studies are considered:Constructed wetlands, used to remove uranium from waste rock runoff before release to an adjacent creek provide a means of “polishing” runoff water prior to discharge to the creek.Creek-Billabong systems with existing wetlands adjacent to mine sites adventitiously “filter” waters discharged from mine sites. Trace elements in dewatering water from a gold mine discharged into an oxbow show reduction of elemental concentrations downstream, compared to discharge water.Naturally generated wetlands at several Northern Territory mines have developed along channels for discharge of pit water, with ingress of Typha domingensis. Such wetlands, associated with dewatering, have been examined at four mines, some with acid mine drainage. Water quality measured after wetland treatments shows reductions in concentrations of various heavy metals and sulfate. Volunteer Typha domingensis grows and spreads in shallow flowing channels, providing an inherent “filtration” of the water.Natural swamplands are incorporated in the waste rock runoff management design of a new gold mine, to reduce potentially high arsenic levels in the waste water. Constructed and naturally occurring wetlands may be used in the treatment of most mine waste waters to achieve levels of constituents acceptable for discharge to the surrounding environment.

Research in exploration geoscience: The AMIRA model

1989 ◽  
Vol 20 (2) ◽  
pp. 5
Author(s):  
J.R. May ◽  
J.D. Bailey ◽  
J. Cucuzza
Keyword(s):  
Case Studies ◽  
Gold Mineralization ◽  
Structural Information ◽  
Rock Magnetism ◽  
Gold Deposits ◽  
Drill Core ◽  
Specific Research ◽  
James Cook ◽  
Research Themes ◽  
Csiro Division

The paper summarises the exploration related R&D that has been managed by AMIRA/APIRA and gives details of the complex, market oriented process used to develop new projects.The process is illustrated by three case studies taken from the more than 70 exploration projects completed.The Gold Deposits of North Queensland Project conducted by James Cook University studied the various styles of gold mineralization. The Rock Magnetism project undertaken at CSIRO Division of Exploration Geoscience allowed both general and specific research themes to be undertaken in parallel with confidential proprietary investigations on sponsors' drill core. The Palaeogeographic Mapping project undertaken at the BMR Division of Continental Geology provided sponsors with palaeogeographic maps including interpretation and structural information of 70 time slices.Some of the benefits of the AMIRA/APIRA approach are discussed as well as some of the difficulties which arise in ensuring companies obtain appropriate benefits from their sponsorship.

Hydrothermal Breccias and Veins at the Kelian Gold Mine, Kalimantan, Indonesia: Genesis of a Large Epithermal Gold Deposit

2008 ◽  
Vol 103 (4) ◽  
pp. 717-757 ◽  
Author(s):  
A. G. S. Davies ◽  
D. R. Cooke ◽  
J. B. Gemmell ◽  
T. van Leeuwen ◽  
P. Cesare ◽  
...  
Keyword(s):  
Gold Deposit ◽  
Gold Mine ◽  
Epithermal Gold ◽  
Epithermal Gold Deposit
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