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1
U.S. Geological Survey professional paper
is associated with considerable hematitic and magnetitic black sand." During the
operations of the Calari Dredging Co. in 1933, 85-90 percent of the gold in the
gravels was extracted. "It ranged in size from flour up to fragments 0.1 inches in ...
Geological Survey (U.S.), 1965
2
Geological Survey Bulletin
GRADE The weighted average of the iron content for 99 m of hematitic sandstone
from 10 drill holes sampled by Minerals Development Corp. in the Mill Creek
area is 17 percent Fe (iron). The "upper zone" has an average of 6 m of hematitic
...
3
Geological Survey Professional Paper
blocks represent fine-grained hematitic iron-formation, 19 blocks represent
magnetic iron-formation, and 12 blocks represent coarse-grained hematitic iron-
formation. Each value on the histograms and in the table represents an average
for ...
4
Geology of the Thomas Range Fluorspar District, Juab County, ...
Shaly member: Shale, green, fissile; stained red along the fractures in lower part
and interbedded with brick-red hematitic quartzite, in part mottled. Twelve
quartzite beds range in thick- Cumu- ness from 0.3 to 2.8 feet. Fucoids are found
along ...
Mortimer Hay Staatz, Frank W. Osterwald, 1959
5
Phosphate Deposits of the World: Volume 1: Proterozoic and ...
They consist of fragments and blocks of massive cross-bedded quartz sandstone
with pebble bands, hematitic mudstone, sandstone and quartz breccia, and
chloritic mudstone and quartz breccia set in a matrix of hematitic mudstone or ...
P. J. Cook, J. H. Shergold, 2005
6
Stratabound Ore Deposits in the Andes
The contacts among hematitic strata are sharp and irregular in shape when
hematitic strata interstratify with chamosites and quartzites. Flaser lamination,
although not well developed, is a frequent feature. A similar process occurs with
massive ...
7
Geochemistry of Hydrothermal Ore Deposits
Similar hematitic alteration, also including epidote and sericite, accompanies
many copper ores that include gangue hematite and native copper, such as the
basalt-hosted, Cu-Ag veins (chalcocite) of Mamainse Point, Ontario (Richards
and ...
Hubert Lloyd Barnes, 1997
The gritty material is seen under the microscope to be probably tuffaceous,
consisting of subangular to angular grains of several kinds of lavas, both
andesltic and basaltic, cemented by a hematitic matrix. The mafic minerals are
entirely ...
9
Silurian Conodonts from Wills Mountain Anticline, Virginia, ...
In this report, the Mifflintown Formation includes, in ascending order, the lower
hematitic member, the Cosner Gap Member, and the McKenzie Member. The
type section of the Mifflintown Formation is a composite section consisting of two
...
Charles T. Helfrich, 1975
10
Issues in Earth Sciences, Geology, and Geophysics: 2013 Edition
hematitic phyllite cannot unambiguously be determined because of the K
metasomatism, hematitisation and tourmalinisation recorded in the hematitic
phyllite and in the arenaceous country rocks. Here we report the B-isotopic and
chemical ...
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Northern Uranium Drill Hole MG15DD-0016 Intersects Highest …
Both of these hydrothermal zones contained strong hematitic limonite alteration and were associated with anomalous radioactivity. A one metre ... «Junior Mining Network, 7월 15»
Assessing the Accuracy of Quantitative XRD with Fe-Ore Certified …
Tables 2 and 3 show the phase abundances from Rietveld QPA. While the SX11-12 sample is mainly a hematitic high-grade iron ore having ... «Azomining, 6월 15»
Blackham Resources has early gold success at Republic Reef
In contrast to Golden Age, mineralisation at Republic Reef is hosted in hematitic basalts containing approximately 10% pyrite and 5% ... «Proactive Investors USA & Canada, 6월 15»
Citing lack of demand, Goa industry wants export duty on iron-ore …
It adds that the low-grade iron-ore is hematitic and thus unsuitable for pelletisation, given its high energy consumption. It has expressed ... «Hindu Business Line, 1월 15»
Purepoint Explores for Elusive Uranium in the Athabasca Basin
Quartz rich semi-pelitic gneiss with strong chloritic alteration with patchy hematitic alteration was then encountered to the completion depth of ... «Geology for Investors, 5월 14»
Eclipse Metals finds extensive visible surface iron at Moonford …
Geological reconnaissance mapping confirmed substantial limonitic-hematitic mineralisation in the southern part of the Moonford Project ... «Proactive Investors Australia, 5월 14»
XRD and TOPAS Quantitative Phase Analysis (QPA) of Fe-Ore …
The sample SX11-12 is a primarily hematitic high-grade iron ore with trace amounts of gangue, while the SX11-14 sample is a magnetite rich ... «Azomining, 3월 14»
Mars Exploration Rovers Update: Opportunity Begins Wrapping …
"The blueberries are hematitic concretions in the Burns Formation, but the newberries seem to have much more of an affinity for the rock around ... «The Planetary Society, 3월 13»
Raw material shortage: Respite for Bhilai Steel Plant
Eklama complex is expected to yield high-grade hematitic iron ore. Geological studies have discovered 39 ore occurrences with a total 200 mt ... «Hindu Business Line, 11월 12»
Mars Exploration Rovers Update: Opportunity Finds Thrill of …
"They're not hematitic concretions, not like the concretions that we've seen in the regular Burns Formation with the sulfates," Arvidson ... «The Planetary Society, 10월 12»
