SEDIMENTARY VOLCANIC INTRUSIVE METAMORPHIC Non-marine Marine Subaqueous Dyke/ Sill Subaerial Pluton CAINOZOIC AND TERTIARY UNITS NOT SHOWN * * Devonian Sandstone, siltstone, mudstone: non-magnetic C Sandstone, siltstone, shale: non-magnetic -- Antrim Plateau Volcanics C la Basalt: moderately magnetic P L rm Arenite, siltstone, shale, conglomerate, arkose, breccia: non-magnetic -- C la -- PALAEOZOIC Sandstone: non-magnetic Pzl 410 Ma C Cambrian Pzs Pzl -- Pzs * Alice Springs Orogeny 300-400 Ma: reactivation of major faults, minor uplift 570 Ma Uplift and erosion Neoproterozoic Redcliff Pound Group Muriel Range * Platform cover sequence 2 ~ 800 Ma? L rm P Sandstone 800 Ma Deformation: thrust faulting, major strike slip faulting, minor uplift, erosion Coomarie Sandstone P L dk-m L dk P Talbot Well Formation Ps L Birrindudu Group Platform cover sequence 1 ~1790-1750 Ma? Glauconitic Sandstone Gardiner Sandstone L dgg P * P L dt Sandstone: weakly magnetic Basalt or magnetite rich sandstone: moderately magnetic L dt P Chert, arenite, siltstone, mudstone, limestone: non-magnetic Sandstone: non-magnetic L dgg P Sandstone: non-magnetic L dg-m P Sandstone: weakly magnetic L dg-n P Sandstone: non-magnetic Ps L Sandstone: non-magnetic member P L dg L dg-m P L dk P L dk-m P P L dg L dg-n P Supplejack Downs Sandstone Uplift and erosion ~1790 Ma Granites Suite Biotite granite; I-type: moderate-highly magnetic, low gravity response L gb P Diorite and gabbro; I-type: high-intensely magnetic, moderate gravity response Frederick Suite L gf P Biotite hornblende granodiorite; I-type: moderate-highly magnetic, low gravity response L gn P Undifferentiated intrusive: non-magnetic, low gravity response P gm L Undifferentiated intrusive: moderately magnetic, low gravity response L gv P Undifferentiated intrusive: variably magnetic, low gravity response Coomarie Suite L gc P Biotite hornblende granodiorite; I-type: weakly magnetic, low gravity response Inningarra Suite P L go Biotite, hornblende granodiorite; I-type: variably magnetic L gw3 P Biotite hornblende granodiorite; I-type: non to weakly magnetic L gw2 P Biotite hornblende granodiorite; I-type: moderate-highly magnetic L gw1 P Biotite hornblende granite; I-type: non-magnetic * L gg P Bore Field Road Suite Gold mineralisation ~1790-1760 Ma? Deformation: strike slip faulting P L gb L gf P 1800 Ma Deformation: thrust faulting, folding ~1810 Ma Pn L P n4 L P n2 L L gc P P L go L lwa P L lw P Felsic volcanism, L gw3 P granite intrusion P gw2 L L gv P P n3 L L gn P P L n1 Gold mineralisation ~1825-1800 Ma? P L gm P n5 L * Palaeoproterozoic PROTEROZOIC L gg P Winnecke Suite P L gw1 1830 Ma Nanny Goat Volcanics Mount Winnecke Group Lc P Deformation: folding, granite intrusion, metamorphism, faulting Mount Charles Formation Basalt member Pargee Sandstone P L tkj P L tk Lt P P L -b P L tt L tdd P Tanami Group Killi Killi Formation Dead Bullock L td P Lm P Jasperlitic Chert member * Twigg Formation ~1880 Ma Undifferentiated: non to weakly magnetic Sandstone: non-magnetic P n4 L Basalt: moderate-highly magnetic P n3 L Rhyolite lava: non-magnetic P n2 L Rhyolitic feldspar-quartz ignimbrite: non-magnetic P n1 L Rhyolitic quartz-feldspar ignimbrite: non-magnetic L lw P Sandstone: non to weakly magnetic L lwa P Dacite and rhyolite porphyries and volcanics: weakly magnetic Lc P Sandstone, siltstone, basalt: non to weakly magnetic, high gravity response P cb L Basalt: intensely magnetic, high gravity response P lg L Conglomerate, sandstone, siltstone: non to weakly magnetic L -am P Undifferentiated: moderate-highly magnetic L -an P Undifferentiated: non to weakly magnetic L -b P Undifferentiated: complex magnetic responses P tdd L Metadolerite sills: moderate-highly magnetic Lt P Undifferentiated: non to weakly magnetic P L cb P L lg 1835 Ma Pn L L n5 P L -am P L m4 P P m3 L P L m2 L -an P P tt L Siltstone, sandstone, chert: non-magnetic P tkj L Jasperlitic chert: non-magnetic L tk P Sandstone, siltstone: non to weakly magnetic L td P Siltstone, numerous high gravity response Lm P Undifferentiated: non to weakly magnetic Formation P m1 L MacFarlane Peak Group Deformation and metamorphism (at Browns Range) followed by rifting and extension P L tdd sills: moderate-intensely magnetic, L m4 P Siltstone and calc-silicate: non to weakly magnetic L m3 P Metagreywacke and schist: non-magnetic P m2 L Interbedded basalt and volcaniclastic sediment, possible felsic volcanics and dolerite: weakly magnetic L m1 P Amphibolite, possible dolerite, basalt: high-intensely magnetic, high gravity response Uplift and erosion of Archaean basement , , , C, la , -- Pattern used to show and dk Ab Undifferentiated schist, gneiss, migmatite: non-magnetic * A Undifferentiated felsic and mafic gneiss, granite and migmatite: variably magnetic, high gravity response * A-n A-n Undifferentiated felsic and mafic gneiss, granite and migmatite: non-magnetic, high gravity response * A A-m Undifferentiated felsic and mafic gneiss, granite and migmatite: moderate-intensely magnetic, high gravity response * ARCHAEAN Browns Range Metamorphics Ab not on map A-m where dt the dg unit soverlies tt basement tk rock Magnetic values of stratigraphy: 0-250 nT weakly magnetic 250-500 nT moderately magnetic 500-750 nT highly magnetic >750 nT GEOLOGICAL SYMBOLS Geological boundary Fault showing relative displacement D U Fault showing relative displacement: down,up Deeply buried source Fold axis: anticline, syncline Axial trace of fold Dyke Magnetic trend Radiometric trend Joint Shear zone d Dolerite Magnetic metamorphic aureole Palaeochannel 1848 +-22 Ma Radiometric age determination in million years, U/Pb SHRIMP A B Unit A overlies unit B intensely magnetic
© Copyright 2024 ExpyDoc
