A total of 48 tills were collected at 1000-metre spacings along 500-metre spaced grid lines. A heavy mineral concentrate was prepared from each till sample and analyzed for gold plus 25 elements. In total, more than sixty percent of the samples assayed above 0.07g/t gold, and up to 4.9g/t gold, with the anomaly being open in all directions.
Shear zone cooling and fabrics of synkinematic plutons
One biotite concentrate from protomylonitic rocks of the Tauá shear zone was also analysed. It yielded a flat age spectrum for nearly 90% of the released 39 Ar in the mid-temperature range (Fig. 8b), with a plateau age of 561 ± 2 Ma (MSWD = 2.0) calculated for 60% of the released gas. This age is concordant with total fusion and isochron ages.
Structural controls on basin development during Miocene to
Salihli granodiorite (biotite) a. biotite into chlorite along shear bands and the replacement « 5 sample 93T55 of garnet by biotite and chlorite in the schists. The straight inclusion trails in the staurolites indicate their static growth PKlMNｾ｟ｲ＠ over a pre-existing foliation.
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Some Remarks on the Geophysical Research of the Litho- sphere
he biotite concentrate of coexisting biotite yielded a corncord-ant plateau age of 343.1±3.8 Ma. Similar single zircon ages –348 Ma- were obtained by Kröner (unpublished data). These coincidental zircon and amphibole, biotite and muscovite ages imply fast cooling, and could be interpreted as cooling during
Timescales of migmatization, melt crystallization, and
 The youngest age revealed from a biotite separate is from a leucosome crystallized in a boudin neck (Rt6‐4) along the eastern bounding Slocan Lake fault. The biotite from the mylonitic migmatite yields a preferred age of 48.2 ± 0.5 Ma with 96% of the gas released . The sample also yields similar integrated and isochron ages: 48.2 ± 0.6 ...
PDF) Petrogenesis of Upper Paleozoic post-collisional
A value of 0.25 x 10 -3 SI was found the in biotite-granite of the SR pluton, whereas in its muscovite-granite the values varied between 0.10 and 0.06 x 10 -3 SI. The magnetic susceptibility data found indicate that both granites are related to ilmenite-series granitoids of ishihARA (1981) and belong to a late-to post-tectonic setting.
PDF) Metamorphism during Alpine Crustal Thickening and
Crustal thickening, meta-perature estimates based on garnet rim + adjacent biotite (550-580 ° C) are reported as retrograde temperatures in morphism, and magmatism in the Anatolide tectonic belt
Can you explain a bit more about Biotite Concentrate
Research on the properties of biotite began in the 1960s and it was soon determined that it was jam packed with minerals. A process was invented to produce a super-concentrate, water purifying liquid from the biotite. The liquid was then filtered and diluted to make Biotite Concentrate (Liquid Crystal Minerals.)
Occurrence and Origin of Andalusite in Peraluminous Felsic
(a) Biotite compositions in the system phlogopite–annite–eastonite–siderophyllite. Despite the genetically unrelated nature of the sample set, biotite compositions from the studied suite of andalusite-bearing rocks have tightly constrained Al iv ≈ 2·68 ± 0·07 a.p.f.u. (b) TiO 2 contents of all analyzed muscovites in the sample set.
Metamorphic evolution of Neoproterozoic metapelites and
The sieved fraction was washed in deionized water and dried at 60°C. Mineral separation according to specific gravity and magnetic susceptibility (Itaya and Takasugi, 1988;Itaya and Fukui, 1994), and hand tapping on a sheet of glossy paper was used to concentrate biotite.
PDF) The nature and origin of the Barrovian metamorphism
Journal of the Geological Society, London, Vol. 168, 2011, pp. 133-146. doi: 10.1144/0016-76492009-164. The nature and origin of the Barrovian metamorphism, Scotland: 40 Ar/39 Ar apparent age patterns and the duration of metamorphism in the biotite zone DA N I E L R .
How thick is biotite?
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Geochemistry | White, William M | download
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PDF) Variscan to Alpine tectonothermal evolution of the
biotite concentrate from sample SV-92 again dis- ... Zagorcev, I. (1993): Multiphase crustal thickening in the. central parts of the Balkan Peninsula. Bull. Geol. Soc. Greece XXIX, 87-97.
Rose Lithium-Tantalum Project, Quebec - Mining Technology
The spodumene concentrate will undergo thickening, vacuum filtration, and drying, before being stored in a 1,500t silo and transported by trucks. Offtake agreement with HELM Critical Elements signed a strategic collaboration agreement with HELM in September 2015 for the offtake of all the products developed at the Rose lithium-tantalum project.
Geochemistry and Geochronology of the Javornik Granodio
vell defined age plateau at 351.1±3.7 Ma. A coexisting biotite yielded an oveall plateau age of 349.6±3.8 Ma. Muscovite from bt+ms granite showed a plateau age of 344.6±3.8 Ma whereast-he biotite concentrate of coexisting biotite yielded a corncord-ant plateau …
Metamorphic inheritance of Rheic passive margin evolution and
According to Peřestý et al. (2017) D2-M2 is related to crustal thickening associated with the formation of vertical fabric and the Barrovian metamorphic zoning with the north-westward increasing ...
Tectonics of the northern Himalaya since the India–Asia
May 01, 2012 · The northern Himalaya experienced crustal thickening before ~ 35.5 Ma; subsequently, a NNW-directed detachment was initiated before 14.5 Ma, followed by doming and the core pluton cooled down to the closure temperature of Ar–Ar system in biotite at about 13 Ma.
Phosphate Ore Mining Process Equipment and Technology - Xinhai
Phosphate ore is mainly used in the fertilizer industry, and also can be used in an airline, food, medical and national defense. Nowadays, we have an increased demand for phosphate, and with the exploration of the phosphate-rich ore, there is less rich ore and more poor ore, it pushes the research and development of mining equipment and technology.
PDF Tungsten and Gold Scheelite-Bearing Ores
one sample were recovered in a gravity concentrate containing 24 pet WO3 (tungstic oxide) and 119 troy ounces per short ton (tr oz/st) Au. Froth flotation of the gravity concentrate resulted in separate tungsten and gold products with grades of 38 pet WO3 and 2,720 tr oz/st Au and recoveries of 60 and 97 pet, respectively.
PDF Excellence in resource and operations Salobo overview
THICKENING - FILTERING Thickener Press Filter Concentrate Pile Concentrate Pulp Tank FINAL PRODUCT Salobo -Flowsheet SECONDARY CRUSHING AND PRIMARY SCREENING HPGR Primary Screens Ball Mills CYCLONE BATTERY Secondary Crushers Secondary Stockpile Secondary Screens HPGR AND SECONDARY SCREENING GRINDING / CYCLONING Crushed ore stockpile PRIMARY ...
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