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Andesi Tstone

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  • (PDF) New Results of Geological Mapping and ...

    2021-10-31 · PDF | On Jan 1, 2010, Tyler Ruks and others published New Results of Geological Mapping and Micropaleontological and Lead Isotopic Studies of Volcanogenic Massive Sulphide–Hosting Stratigraphy ...

  • CKZRDS EARCHED FOR: Gold Diorite,Andesite,Siltstone ...

    2006-2-17 · 1. Upper Triassic-Volcanic sil tstone, sandstone, congl merate and breccias. 2. Eocene - monzonitic stocks 3. Middl e Jurassic - si 1 tstones Local G eol ogy Li thotypes observed on the properties i ncl ude: bl ac k argil 1 i te, 1 ight green 1 aminated sil tstone, calcareous bl ack wacke/sil tstone, fine grained andesi tic

  • USGS

    2011-4-8 · of andesi tic canposition c oppe r gold J SELM MINERALIZATION name of occurrence MODS number pr inci pal c ommodi ty as socia ted commodi ty surface expression (gossan) GEOCHRONOLOGICAL DATA Rb-Sr me thod age reported locatio metho ata rock sampl ed source Anderson, R. E., and 30'' 21000'' Original surveys supervised by B.R.G.M

  • James

    2006-11-7 · Devonian (?) andesi tic graywacke and si 1 tstone Tertiary (?) dikes Quaternary period STRUCTURAL GEOLOGY GEOCHEMISTRY MINERAL DEPOSITS History of mining and exploration General features of mineral deposits Valparaiso mine Golden Fleece mine Boston (?) prospects Prospect east of Amazon Lake outlet Prospects east of central Amazon Lake

  • Lj lsq

    2006-4-6 · basalt flows with interbedded conglomerate and si 1 tstone GAMBIER GROUP: Andesi tic to daci ti c tuff, breccid, agglomerate; GENERAL GEOLOGY . QOSSAN - semctTE ~CMIST INTENSE OOSSAN ZONE @ METAVOLCANIC SCREENS S1 [ I I I( i : GREAT WESTERN PETROLEUM CORR LOCAL GEOLOGY AND PREVIOUS WORK SCALE - I 50,000 PLATE. …

  • REPORT ON GOLD PROPERTY

    2006-3-11 · si 1 tstone-andesi te-di ori te, as the old Era1 orne-Pi oneer mines and the nearby Wayside property. Known mineral i zation consists of a few, narrow shear zones that are weakly anomalous in gold, si 1 ver, arsenic, copper and molybdenum. Significant geochemical anomalies in gold (up to 145 ppb),

  • YUKON

    2014-10-29 · andesi tes; and related rocks. They are. fine- to medium-grained, greenish rocks. with~ laminated structure, and are c~mnonly porphyritic. Some are cOmposed chiefly of pla.gioclase and chlorite, with s~1e ca lcite and quartz. · ·· others consist of plagioC18.''se· and augite with zoisit~ and chlorite-.- ·The

  • (PDF) Crustal Differentiation Processes at Krakatau ...

    Abstract and Figures. Anak Krakatau is a basaltic andesite cone that has grown following the famous caldera-forming 1883 eruption of Krakatau. It breached sea level in 1927 and since the 1950s has ...

  • (PDF) Yarrol Project Team [Murray, C. G., Barker, R. M ...

    Overlyi ng the Footwall the surrounding CarbonifL-ruus rock.-> which give a stronger radiometric Andesi te is the ·Crenulalcd Cherty Lava" which appears to be a response. However, it is the airborne magnetics which really distinguish silicified rhyolite. ... Typic

  • GEOLOGICAL, GEOCHEMICAL

    2005-8-17 · maroon tuffs, andesites, breccias, argill ite, sil tstone, conglomerate and agglomerate. The group is commonly intruded by feldspar porphyry dykes and stocks. 5. PRESENT WORK This gold project was initiated in 1983 for lowing a regional reconnaissance program along the Pinchi Fault. Field work on the

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