mineralized plagioclase

  • Romero Las Tres Palmas (2)GoldQuest Mining

    2019-2-8 · The Las Tres Palmas mineralized trend defined by a prominent chargeability high and geochemical anomalism extends north- to northwestwards for 5 km from Escandalosa in the south to Romero in the north. Although structural localisation of the trend is

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  • ANALYSTINVESTOR TOUR PRESENTATION

    2020-4-8 · hornblende-plagioclase porphyry Post-mineral dykes (minor) SW NE Lithologic Model of Saddle North • Hornblende-plagioclase porphyryticintermediate intrusions cutting main Saddle North Intrusions • Geochemically distinct • Variably mineralized increasingly well-mineralized to depth (e.g. TTD093 TTD109) • Lower Jurassic conglomerate

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  • Mingjian CAO Associate professor Dr. Chinese Academy

    Textural and compositional microscale (10-100 μm) and nanoscale (10-100 nm) zoning in a plagioclase phenocryst from a fresh syn-mineralization diorite porphyry (Black Mountain porphyry Cu-Au

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  • Lorne E. Luhta December 1998

    2017-1-17 · plagioclase gneiss and minor amphibolite which are recrystallized anorthosites. They are separated from the norites by a sheared felsic dike or sheared metasedimentary rocks. The rocks of the mineralized zone are cut by east-northeasterly felsic dikes

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  • Magmatic and Postmagmatic Processes in Tin-mineralized

    1997-12-1 · De-anorthitization of plagioclase can be identified in thin section from the occurrence of numerous very small mineral inclusions in albitic plagioclase. These inclusions (fluorite topaz quartz sericite calcite epidote etc.) contain cations of the anorthite molecule and are formed by plagioclase–fluid interaction.

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  • "The Genesis of PGE Mineralization in the River Valley

    The 2.48 Ga mafic River Valley Intrusion hosts contact-style Cu-platinum group element (PGE) mineralization. Magmatic sulphides comprise pyrrhotite ± chalcopyrite ± pentlandite whereas hydrothermal sulphides comprise chalcopyrite ± pyrite ± marcasite. The latter are more widespread forming a halo up to 150 m from the mineralized zone and are intimately associated with replacement

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  • UNITED STATES DEPARTMENT OF THE INTERIOR

    2010-11-29 · rocks contain subhedral to euhedral phenocrysts of plagioclase (An0 ) Jo—44 and hornblende ranging in size from 0.3 to 2 mm. The matrix is composed of subhedral laths of plagioclase and anhedral quartz and in places minor amounts of potassium feldspar. Mineralized rocks containing pyrite and in places lesser amounts of

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  • Petrogenesis of the Pt–Pd mineralized Jinbaoshan

    2006-11-3 · Plagioclase has a tabular shape averaging ∼ 1 3 mm. Augite crystals are mostly <1 mm across. Most augite crystals are altered to tremolite and talc whereas most plagioclase crystals are altered to chlorite plus Fe-rich epidote containing up to 13 wt Fe. Small calcite veins are present in microfractures in the rocks.

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  • Rapid crystallization of precious-metal-mineralized layers

    Isotopic heterogeneity is present between plagioclase crystals between clinopyroxene and plagioclase and within plagioclase crystals throughout the studied section. On the basis of these observations we demonstrate that platinum-group element mineralization formed by repeated small-volume reactive melt percolation events.

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  • Drillhole Log Meters

    2015-11-12 · Plagioclase 45-55 Hornblende 40-50 Biotite 1-3 (very fine grained) Unit non mineralized Upper contact gradational lower contact sharp and structural at 66 deg TCA Transition to lower unit is gradual and marked by a reduction in the abundance of hornblende and the occurrence of pyroxene.-Leucogabbro MQ-13-024 Page 2 of 19

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  • Petrographic Implications for the Picket Pin PGE Deposit

    2020-3-26 · The plagioclase grains can be divided into large (0.5-2.5 cm) framework grains and small (<0.5 cm) intercumulate grains. The ratio of large framework plagioclase to small intercumulate plagioclase grains increases near sulfide mineralization. Hence the mineralized zones occur in the coarse-grained areas. This may suggest a

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  • Journal of Asian Earth Sciences

    2011-11-17 · appear as stock and dyke. Duobuza mineralized granodiorite porphyry (DMGP Fig. 2A and B) has a kidney shape with a north–south extension of 200 m and an east–west length of 1000 m (Fig. 1b) in the northeastern section of Duolong deposit. This porphyry mainly contains plagioclase quartz chloritized a b Fig. 1.

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  • Cathodoluminescence features trace elements and oxygen

    2019-1-1 · Individual UST layers consist dominantly of hexagonal quartz (>95 ) with minor K-feldspar plagioclase biotite muscovite and magnetite. Scanning electron microscope-cathodoluminescence (SEM-CL) reveals that the aplitic quartz is homogeneous and CL-bright with minor CL-dark patches.

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  • Romero Las Tres Palmas (2)GoldQuest Mining

    2019-2-8 · The Las Tres Palmas mineralized trend defined by a prominent chargeability high and geochemical anomalism extends north- to northwestwards for 5 km from Escandalosa in the south to Romero in the north. Although structural localisation of the trend is

    Get Price
  • Hydrothermal Alteration and Mineralization of Middle

    2007-11-6 · (a) Least‐altered granodiotite only illite occurred in the fractures of plagioclase (b) least‐altered phyllite (c) K‐silicate alteration plagioclase show some illite along hair‐like cracks but polysynthetic twinning and zoning are still visible the hydrothermal biotite occurs (d) mafic minerals destructive alteration illite chlorite and magnetite replace the biotite along the cleavages (e)

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  • GEOLOGICAL REPORT ON THE MAYBRUN MINE

    2017-1-17 · unit concomitant with an increase in selvage sulphide. These mineralized plagioclase-phyric flow units are denoted as I II and an upper flow III and have an average thickness of 60 metres. Mineralization is confined to flow II with minor subeconomic gold present in flow III. Sulphides and visible gold are present in variable

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  • Geochemistry and Petrogenesis of Diabase Dykes in the

    2018-2-2 · Figure 3. (a) Laths of plagioclase enclosed by altered augite grains in normal diabase (b) Microphotograph showing development of micropegmatite within the altered plagioclase laths in the mineralized diabase. Chlorite occurs as fresh green coloured patches. Micropegmatite is seen as small pegs within the interstices of plagioclase (Figure 3(b)).

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  • A Gold- and Platinum-Mineralized Layer in Gabbros of

    2001-8-30 · Deposition of the mineralized layer is associated in space and time with injections of plagioclase-saturated primitive magma that mixed with more evolved resident magma. These events caused efficient partitioning of Au and PGE into sulfides derived from a large volume of magma deposition of these sulfides to form the mineralized layer and

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  • Regional ExplorationIAMGOLD Rosebel Gold Mines N.V.

    Mineralized quartz veins range from a few centimetres up to 4 metres in thickness and are typically associated with a wall-rock alteration assemblage comprising sericite chlorite carbonate tourmaline pyrite pyrrhotite and plagioclase. Alteration halos range from 0.25 metres around individual veins to over 20 metres around major vein sets.

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  • "The Genesis of PGE Mineralization in the River Valley

    The 2.48 Ga mafic River Valley Intrusion hosts contact-style Cu-platinum group element (PGE) mineralization. Magmatic sulphides comprise pyrrhotite ± chalcopyrite ± pentlandite whereas hydrothermal sulphides comprise chalcopyrite ± pyrite ± marcasite. The latter are more widespread forming a halo up to 150 m from the mineralized zone and are intimately associated with replacement

    Get Price
  • Barsele Minerals Corp. Project

    Our 45 owned Barsele Gold Project is located approx. 600 km due north of Stockholm and 20 km southeast of Storuman a small town situated in Västerbottens Län which is a regional district of Northern Sweden. There is also potential for polymetallic VMS deposits within the claims. Our total mineral claim holdings are over 47 000 hectares.

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  • MINERALIZATION POTENTIALS OF PEGMATITES IN THE

    2016-10-27 · albitized and mineralized pegmatities (Kuster 1990). Albite K-feldspar and quartz are the main pegmatitie-forming mineral white mica is a typical but minor component. From a geochemical point of view quartz is of no particular interest since it diadochially (substitutionally) hosts trace elements to a negligible extent. Feldspars and white

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  • Rapid crystallization of precious-metal-mineralized layers

    Plagioclase Sr concentrations mostly range between 250 and 500 ppm and barium (Ba) and rubidium (Rb) concentrations are consistently <1 ppm.

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  • Journal of Asian Earth Sciences

    2011-11-17 · plagioclase hornblende and minor pyroxene (Table 1). The postmineralization (Fig. 2F and G) basaltic andesites are distributed in the central section of Duolong deposit. The post-mineralization fresh andesite (Fig. 2H) occurs in the northeastern section of Duo-long deposit and mainly contains plagioclase and hornblende (Ta-ble 1).

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  • Drillhole Log Meters

    2015-11-12 · Plagioclase 45-55 Hornblende 40-50 Biotite 1-3 (very fine grained) Unit non mineralized Upper contact gradational lower contact sharp and structural at 66 deg TCA Transition to lower unit is gradual and marked by a reduction in the abundance of hornblende and the occurrence of pyroxene.-Leucogabbro MQ-13-024 Page 2 of 19

    Get Price
  • "The Genesis of PGE Mineralization in the River Valley

    The 2.48 Ga mafic River Valley Intrusion hosts contact-style Cu-platinum group element (PGE) mineralization. Magmatic sulphides comprise pyrrhotite ± chalcopyrite ± pentlandite whereas hydrothermal sulphides comprise chalcopyrite ± pyrite ± marcasite. The latter are more widespread forming a halo up to 150 m from the mineralized zone and are intimately associated with replacement

    Get Price
  • Petrographic Implications for the Picket Pin PGE Deposit

    2020-3-26 · The plagioclase grains can be divided into large (0.5-2.5 cm) framework grains and small (<0.5 cm) intercumulate grains. The ratio of large framework plagioclase to small intercumulate plagioclase grains increases near sulfide mineralization. Hence the mineralized zones occur in the coarse-grained areas. This may suggest a

    Get Price