the malanjkhand copper ( + molybdenum) deposit, india,econ nath m, mathur sm, sharma rs, nilakantham s, narang sl, geol 75: 384±409 sonakia a (1973) geology and mineralization in malanjkhand brimhall gh jr, ghiorso ms (1983) origin and ore-forming con- area, balaghat district, mp, spec publ 3, gsi, 203±207 sequences of the advanced argillic alteration process in hypo- panigrahi mk (1992) copper-molybdenum mineralization and gene.the geology of the nkana mindola sediment hosted copper,therefore, to fully document and understand the processes controlling ore fluid introduction and distribution, one must attempt to identify each event, as well as understand the potential scale and relationship to the alteration systems operating during the formation of sediment-hosted copper deposits (e.g. kirkham, 1989; hitzman et al., 2005.
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geological map of malanjkhand copper deposit, modified after narang et al (1979), 1. talus 2. laterite 3. arkosic grit, quartzite and phyllite 4. conglomerate 5. quartz reef 6. granite/granodiorite. type c inclusions at room temperature are similar to the so-called dry gaseous
malanjkhand deposit the malanjkhand deposit is a classic porphyry copper deposit, associated with a granodiorite-quartz-monzonite-granite pluton. the rock types exposed in the pit mine and the surrounding country are biotite, granite, tonalite, granodiorite and adamellite of variable grain size and gradational mineralogy and chemistry and collectively referred to as malanjkhand granitoids.
are recognized at malanjkhand in and around the copper deposit over an area of about 200 km 2. these are (i) a fine grained 'leucogranite' of restricted occurrence in the surrounding area (gr-i); (ii) coarse-grained, grey in most parts, gneissose granitoid of regional extension
geology the malanjkhand copper deposit is hosted within a multi-phase, tonalite-granodiorite-adamellite-granite-trondhjemite pluton that has yielded a date of 2362±58 ma, which intrudes the broader enveloping malanjkhand granodiorite-adamellite-granite pluton, which also hosts much of the ore and the archaean amgaon group (jain, et al., 1995; sikka, 1989).
malanjkhand copper project was established in 1982.initial project has been set up by hindustan copper ltd to exploit the copper ore through an open pit mine. geological survey of india took systematic geological exploration at this deposit during 1969. mining lease of the ore
the malanjkhand porphyry copper deposit m.p., india is estimated to contain 789 mt (870 million st) averaging 0.83% copper (mill head grade); 0.004% molybdenum; 0.2 g/t (0.006 oz/st) gold; 6 g/t
geological setting the malanjkhand deposit is a classic por- phyry copper deposit associated with a gran- diorite-quartz monzonite-granite pluton. it has many characteristics in common with major porphyry copper deposits discovered in other parts of the world (titley and hicks, 1966; sutherland brown, 1976; titley and beane, 1981; titley, 1982 ).
introductio n. malanjkhand is the biggest base metal (copper) open pit mine in india located at a distance of 90 kilometers north-east of balaghat in madhya pradesh, at an altitude of 576 mrl. it...
copper is also commonly found in the oxidized zones of mineral deposits and in basalt cavities that have been in contact with hydrothermal veins. the presence of volcanoes in a region is often a good indicator of the presence of copper because that is where basalt cavities are in abundance near the sedimentary layer of the earth.
copper and subordinate molybdenum mineralization at malanjkhand occurs within a fracture-controlled quartz-reef enclosed in a pink granitoid body surrounded by grey-granitoids constituting the regional matrix. sulfide-bearing stringers, pegmatites with only quartz + microcline and sulfide disseminations, all within the pink-granitoid, represent
mineral chemistry of biotite, chlorite and epidote associated with the granitoid ore body of the malanjkhand copper-molybdenum deposit have been studied to constrain temperature, oxidation and sulfidation states as well as fugacity ratios of hf, hcl and h 2 o of the hydrothermal mineralizing fluid. calculated mineralizing temperatures from biotite, chlorite and epidote are mutually consistent
geology of the san manuel copper deposit, arizona by george m. schwartz abstract the san manuel copper deposit is in the old hat mining district, final county, ariz. it is 35 miles northeast of tucson and about a mile south of tiger where the st. anthony mine produced gold, molybdenum, vanadium, lead, and zinc.
the cementation zone of this deposit contains abundant microbial life dominated by sulfate-reducing bacteria that coexist with methanogens and with other prokaryotes having unknown roles. fractures in the primary massive sulfides are coated by extracellular polymeric substances in which the microbial cells are embedded.
a different but closely related group of deposits to porphyry copper deposits are the skarn deposits. skarns are formed when hot magma intrudes the limestone the fluids from the intrusive alter the limestone to form an exoskarn. the intrusives also simulates the limestone altering its composition and forming and endo skarns.
furthermore, some geological differences are recognized between the two groups, as indicated by sato (1984): the northern area deposits are hosted in basaltic andesite to andesite-dominated jurassic volcanic-sedimentary piles (camaraca, ofícina viz and la negra formations), except the mantos blancos deposit, which is hosted in the jurassic felsic volcanics and subvolcanic
the copper mineralization in the flanks of the deposit is dominated by chalcopyrite. copper and gold grades decrease downward but quartz-molybdenite stockwork mineralization grading > 0.05% mo extends to the lower limit of drilling. equigranular monzonite is the predominant ore host, containing 53% of the ore mined to date.
in a paper published in the journal communications earth & environment, the scientists explain that porphyry copper deposits develop several kilometres below the
abstract copper and subordinate molybdenum mineralization at malanjkhand occurs within a fracture-controlled quartz-reef enclosed in a pink granitoid body surrounded by grey-granitoids constituting the regional matrix. sulfide-bearing stringers, pegmatites with only quartz + microcline and sulfide disseminations, all within the pink-granitoid, represent other minor modes of occurrences
so this gives us a start in deciding where to focus our exploration because of the extensive subduction during the tertiary i.e. in the last 65,000,000 years many porphyry deposits are of this age in other words porphyries are relatively young by geological standards; just put that comment in context although 65 million years sounds a long time ago if the earth’s history was compressed into
abstract: kazakhstan has rich reserves of copper. stratiform copper sandstones and copper-porphyry deposits are the main industrial types of copper ore: the largest deposit of copper sandstones is zhezkazgan (central kazakhstan), and aktogay is a large deposit of copper-porphyry type (east kazakhstan). this article describes these two deposits.
geology of the spence porphyry copper deposit miguel tapia bhp billiton, antofagasta, chile ([email protected]) the spence deposit is hosted in paleocene (57 ma) quartz monzonite to granodiorite stocks and dikes which intruded volcanic and volcanoclastic rocks of the upper jurassic to lower cretaceous quebrada mala formation. at least
the geology of the nifty copper deposit, throssell group, western australia: implications for ore genesis. economic geology 96: 1535-1565. bagas l. and lubieniecki z., 2000. copper and associated polymetallic mineralization along the camel-tabletop fault zone in the paterson orogen, western australia. annual review for 1999-2000, geological
copper deposits of the western upper peninsula of michigan 85 ﬂ d024-05 1st pgs page 85 copper districts host stratiform/stratabound copper deposits in rift-ﬁ lling volcanic and clastic sedimentary rocks. these deposits were mined from 1845 to 1996 with potential revival of mining in the region as a result of exploration and development activi-
this chapter presents a brief account of the copper deposits and occurrences in myanmar. myanmar has more than 70 copper occurrences, including world-class high-sulphidation cu ± au deposits west of monywa on the west bank of the chindwin river (fig. 26.1, table 26.1). in 1985, myanmar commenced copper production with the development of the sabetaung copper deposit at monywa in central