Tabulated geochemistry and assays of bedrock samples from mineral exploration drill holes on and near Red Lake Indian Reservation lands, northern Minnesota

1994 ◽  
Author(s):  
T.L. Klein
Keyword(s):  
Mineral Exploration ◽  
Indian Reservation ◽  
Red Lake ◽  
Drill Holes

Geochemical analyses of bedrock samples from drill holes on and near Red Lake Indian Reservation lands, northern Minnesota

1994 ◽  
Author(s):  
T.L. Klein ◽  
D.F. Siems ◽  
D.L. Fey ◽  
J.M. Motooka ◽  
A.H. Love ◽  
...  
Keyword(s):  
Indian Reservation ◽  
Red Lake ◽  
Geochemical Analyses ◽  
Drill Holes

scholarly journals A rich fauna of subterranean short-range endemic Anillini (Coleoptera, Carabidae, Trechinae) from semi-arid regions of Western Australia

ZooKeys ◽  
2021 ◽  
Vol 1044 ◽  
pp. 269-337
Author(s):  
Pier Mauro Giachino ◽  
Stefan Eberhard ◽  
Giulia Perina
Keyword(s):  
New Species ◽  
Leaf Litter ◽  
Western Australia ◽  
Short Range ◽  
Mineral Exploration ◽  
Great Majority ◽  
New Genera ◽  
Eastern Australia ◽  
Drill Holes ◽  
Semi Arid

Globally, the great majority of Anillini species are endogean, adapted to live in the interstices of soil and leaf litter, while the extremely low vagility of these minute ground beetles gives rise to numerous shortrange endemic species. Until recently the Australian Anillini fauna was known only from leaf litter in rain forests and eucalypt forests in the wetter, forested regions of eastern and south eastern Australia, as well as Lord Howe and Norfolk islands. The first hypogean Anillini in Australia (17 species in six genera) were described in 2016 from mineral exploration drill holes in iron-ore bearing rocks of the Pilbara region in Western Australia, representing the first finding of the tribe deep underground in a semi-arid climate region. A further eight new genera and 20 new species are described herein, mostly from the Pilbara region as well as the semi-arid Kimberley and Goldfields regions; all were collected in mineral exploration drill holes. The following new genera are described: Erwinanillusgen. nov., Gregorydytesgen. nov., Pilbaraphanusgen. nov., Neoillaphanusgen. nov., Kimberleytyphlusgen. nov., Gilesdytesgen. nov., Pilbaradytesgen. nov., and Bylibaraphanusgen. nov. The following new species are described: Erwinanillus baehrisp. nov.; Gracilanillus hirsutussp. nov., G. pannawonicanussp. nov.; Gregorydytes ophthalmianussp. nov.; Pilbaraphanus chichesterianussp. nov., P. bilybarianussp. nov.; Magnanillus firetalianussp. nov., M. sabaesp. nov., M. salomonissp. nov., M. regalissp. nov., M. serenitatissp. nov.; Neoillaphanus callawanussp. nov.; Kimberleytyphlus carrboydianussp. nov.; Austranillus jinayrianussp. nov.; Gilesdytes pardooanussp. nov., G. ethelianussp. nov.; Pilbaradytes abydosianussp. nov., P. webberianussp. nov.; Bylibaraphanus cundalinianussp. nov.; and Angustanillus armatussp. nov. Identification keys are provided for all Australian anilline genera, and Western Australian species. All the described species are known from a single locality and qualify as short-range endemics. The Anillini are recognised as a significant and diverse element making up part of Western Australia’s remarkable subterranean fauna, and whose conservation may potentially be impacted by mining developments.

An emerging shale gas play in the Northern Territory

2012 ◽  
Vol 52 (2) ◽  
pp. 672
Author(s):  
Ray Johnson ◽  
Geoff Hokin ◽  
David Warner ◽  
Rod Dawney ◽  
Mike Dix ◽  
...  
Keyword(s):  
Shale Gas ◽  
Oil And Gas ◽  
Mineral Exploration ◽  
Northern Territory ◽  
Gas Flows ◽  
Oil And Gas Resources ◽  
Unconventional Oil And Gas ◽  
Shale Reservoirs ◽  
Drill Holes ◽  
Live Oil

As attention to unconventional oil and gas resources increases, historical oil and gas flows in shale reservoirs across the world are being given renewed attention. Such is the case of the shaly and carbonate deposits of the McArthur and Nathan groups in the Northern Territory. The Batten Trough is a Proterozoic depocenter with potential for a shale gas play in the Barney Creek Shale and potential for conventional gas accumulations in the underlying Coxco Dolomite. This Barney Creek Shale gas play is evidenced by a number of mineral exploration drill holes that encountered live oil and gas shows within the McArthur Group. The most prominent was a mineral exploration hole drilled at the Glyde River prospect by Amoco in 1979. This well reportedly flowed gas and condensates at 140 psi for six months before it was sealed at the surface, which certainly shows permeability values greater than micro-darcies reported for many North American shale plays; thus, an exploration program of this prospective area has been planned by Armour Energy in EP 171 on several targets adjacent to the Emu Fault Zone near both Glyde and Caranbirini, along with other anticline related targets adjacent to the Abner Range. This extended abstract details how the targets were identified, the plan for data acquisition (e.g. seismic, drilling, logging and testing), and the proposed completion strategy to test this highly prospective target.

Geochemical data of diamond drill core samples adjacent to the Red Lake Indian Reservation, northern Minnesota

1993 ◽  
Author(s):  
Warren C. Day ◽  
R.L. Earhart ◽  
Paul H. Briggs ◽  
J.S. Mee ◽  
D.F. Siems ◽  
...  
Keyword(s):  
Geochemical Data ◽  
Drill Core ◽  
Indian Reservation ◽  
Diamond Drill ◽  
Core Samples ◽  
Red Lake

scholarly journals Potential Impacts to Wetlands and Water Bodies Due to Mineral Exploration, Pebble Copper-Gold Prospect, Southwest Alaska

Environments ◽  
2019 ◽  
Vol 6 (7) ◽  
pp. 84
Author(s):  
Zamzow ◽  
Chambers
Keyword(s):  
Natural Waters ◽  
Mineral Exploration ◽  
Quality Criteria ◽  
Water Quality Criteria ◽  
Regulatory Oversight ◽  
Drilling Waste ◽  
Copper Gold ◽  
Exploration Drilling ◽  
The One ◽  
Drill Holes

There is little information in the literature about the impacts of mineral exploration drilling on natural waters. A copper-gold-molybdenum mining deposit in Alaska was heavily explored until 2012 and partially reclaimed; however, full reclamation of drill sites remained incomplete in 2016. Copper is sub-lethally toxic to salmon, a highly-valued resource in this area. Of 109 sites inspected, 9 sites had confirmed impacts due to un-reclaimed drill-holes or drill waste disposal practices. At seven sites artesian waters at the drill stem resulted in surface water or sediment elevated in aluminum, iron, copper, or zinc with neutral pH. Copper concentrations at artesian sites were <0.4, 0.7, 2, 7, 15, 76, and 215 µg/L; the latter four exceed water quality criteria. Drilling waste is known to have been disposed of in ponds and unlined sumps. At one of five ponds sampled, copper declined from 51 to 8 µg/L over nine years. At the one sump area with historical data, copper increased from 0.3 to 1.8 µg/L at a downgradient wetland spring over five years. This research identifies contaminant types and sources and can be used to guide future ecotoxicity studies and improve regulatory oversight.

Lithostratigraphic Mapping Through Saprolitic Regolith Using Soil Geochemistry and High-Resolution Aeromagnetic Surveys.

2020 ◽  
Author(s):  
Helen Twigg ◽  
Murray Hitzman
Keyword(s):  
Carbonate Rocks ◽  
Democratic Republic Of Congo ◽  
Mineral Exploration ◽  
Geological Mapping ◽  
Geochemical Data ◽  
Soil Geochemistry ◽  
Residual Soils ◽  
Copper Zinc ◽  
Siliciclastic Rocks ◽  
Drill Holes

&lt;p&gt;The Neoproterozoic Central African Copperbelt located in southern Democratic Republic of Congo (DRC) and the northwestern Zambia and contains 48% of the world&amp;#8217;s cobalt reserves and significant resources of copper, zinc, nickel and gold. A good understanding of the geology is critical for successful mineral exploration. However, geological mapping is hindered by low topographic relief, limited outcrop, and a generally deep (10-100m) weathering profile developed since the Late Miocene.&amp;#160; Multielement soil geochemistry provides a means for conducting geological mapping.&amp;#160; &amp;#160;Areas with outcrop or containing drill holes and/or trenches were utilized to relate known geological lithologies with soil geochemical results using major element and trace element ratios.&lt;/p&gt;&lt;p&gt;The lithostratigraphy within a study area along the DRC-Zambia border can be geochemically sub-divided into three units. Mixed carbonate and siliciclastic lithologies of the lower portion of the local stratigraphy are typically characterised by elevated V, Ti, and Nb. Mudstones and siltstones are dominated by elevated Al, Fe and Ba. The upper portion of the local stratigraphy is geochemically neutral with regards to trace elements.&amp;#160; Lithological discrimination through analysis of soil geochemical data is limited in some areas by intense weathering. A A-CNK-FM diagram exhibits how complete weathering of carbonate rocks and carbonate-rich breccias (after evaporites) results in the somewhat counter intuitive outcome that residual soils above carbonate rocks are amongst the most aluminum rich in the study area with &gt;80% Al&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt; (mol%) or &gt;80% combined Al&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt; (mol%) and FeO + MgO (mol%). The weathering of siliciclastic rocks (siltstones, mudstones, and diamictites) result in a shorter weathering path across a A-CNK-FM diagram, probably due to their higher original proportion of resistate phases.&lt;/p&gt;&lt;p&gt;An area specific geochemical database of baseline lithostratigraphy weathering paths allows the identification of atypical geochemistry which could indicate facies change, alteration or mineralization.&lt;/p&gt;

HEAT FLOW IN A “BLIND” GEOTHERMAL AREA NEAR MARYSVILLE, MONTANA

Geophysics ◽  
1973 ◽  
Vol 38 (5) ◽  
pp. 941-956 ◽  
Author(s):  
David D. Blackwell ◽  
Czang‐Go Baag
Keyword(s):  
Heat Flow ◽  
Magma Chamber ◽  
Mineral Exploration ◽  
High Heat ◽  
Geothermal Area ◽  
High Heat Flow ◽  
Thermal Fluids ◽  
Continental Divide ◽  
Drill Holes ◽  
Anomalous Heat

A unique geothermal area has been discovered during the course of a regional heat‐flow study using holes drilled for mineral exploration. There are no surface manifestations of abnormal subsurface temperature in spite of the fact that at one locality a temperature of 58°C was measured at a depth of only 220 m. The area of anomalous heat flow straddles the Continental Divide near the old gold mining camp of Marysville, Montana about 30 km northwest of Helena. Measured values of conducted heat flow range from 3.2 to [Formula: see text] sec. The immediate source of the high heat flow is either an unexposed reservoir of thermal fluids or a very shallow still‐cooling magma chamber. At the present time the magma chamber model is preferred. The presence of additional similar areas in the western U.S. is suggested by the data from regional heat‐flow studies. However, in most of the other areas only single anomalous heat‐flow value is available, whereas at Marysville a region of several tens of [Formula: see text] is known to have abnormal heat‐flow values. It is suggested that temperature measurements should be made in available drill holes deeper than 30 m in the high heat‐flow regions of the western U.S. as an inexpensive way to explore for other “blind” geothermal reservoirs.

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