 | | Journal (article/letter/editorial) | | (Northern Espinhaço, Brazil): LA-ICP-MS age determinations on relict and recrystallized zircon and geodynamic...(Northern Espinhaço, Brazil): LA-ICP-MS age determinations on relict and recrystallized zircon and geodynamic...range at 643±19 Ma. - Metamorphic zircon forms from protolith-zircon in a dissolution- - ip t precipitation...metamorphic overprinting of a psammitic rock 2. Zircon crystals can be replaced completely or can be preserved...preserved ip t completely 3. Local differences in zircon and/or fluid composition decide cr 4. Age of |  | | Journal (article/letter/editorial) | | metaquartzites of the northern Serra do Espinhac o (State of Bahia, Brazil) G. Morteani1 and D. Ackermand2...horizon belongs to the Middle Proterozoic Serra de Vereda member of the S~ao Marcos Formation of the...hills of the Serra de Canas=Cana Brava (Northern Serra do Espinhac o, State of Bahia, NE Brazil) about 10...controlled by the amount of xenotime, monazite and zircon. Oxygen thermometry on quartz and hematite and...world-wide e.g. from the present study area in Bahia (Brazil) by Cassedanne and Franco (1966), Cassedanne |  | Murakami, Takashi, Chakoumakos, Bryan C., Ewing, Rodney C., Lumpkin, Gregory R., Weber, William (1991) Alpha-decay event damage in zircon. American Mineralogist, 76 (9-10) 1510-1532 | Journal (article/letter/editorial) | | pages l5l0-1532, 1991 Alpha-decayevent damagein zircon Tlx,c.sHr Muuxllrr Department of Environmental...transmission electron microscopy of a suite of natural zircon samplesfrom Sri Lanka (0.06 x l0r5 to 6.3 x l0rs...Comparison of results for natural zircon with those for Pu-doped zircon showed that dose-rate variations...density decreasedmore for the Pu-doped zircon than for natural zircon in the early stagesof damageaccumulation...the damage accumulation processoccurs in natural zircon under ambient conditions. This accounts for the |  | | Journal (issue) | | noted) : CITRINE • Crystal Cluster, Honey Color, Brazil ; 1/2 lb. • 2 lb. size (1D lb. min.) Inv. #22090...$1.80 : CITRINE • Crystal Cluster, Amber Color, Brazil : 1/2 lb. • 3 lb. size (6 lb. min.) Inv. #22091...#22091 •••••••••••••••• $5.60 : CITRINE CATHEDRALS - Brazil : 100 lb. - 300 lb. size Inv. #22091 • 1 ••••••••••••••••••••••••...#26790 •••••••••••••• $2.00 : DOLOMITE • Orange, Brazil : 10 lb. • 20 lb. size (10 lb. min.) Inv. #26793...$1.50 : : FUCHSITE • With Tips of Ruby Embedded,Brazil 1 lb. - 10 lb. size (10 lb. min.) Inv. #30190•••••••••••••••• |
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