SHRIMP U-Pb Age
Deep Crustal Evolution of the Western Churchill Province, Nunavut, Canada: Isotopic (U-Pb, O), Trace Element and Micro-Structural Analysis of Zircon from Lower Crustal Xenoliths
... The SHRIMP U-Pb results and electron nanobeam analyses reported here for the Rankin Inlet and Repulse Bay lower crustal xenolith suites provide new insight into a process of Pb-redistribution ...
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SHRIMP zircon U–Pb ages from coal beds across the Permian–Triassic boundary, eastern Yunnan, southwestern China
... the age of Bed 67 should be slightly older than Bed 68a dated as ...similar age of ...the age of Bed 68 is comparable with that of Bed 25 at the Meishan section, which is the main extinction ...the ...
13
The Tonian Embu Complex in the Ribeira Belt (Brazil) : revision, depositional age and setting in Rodinia and West Gondwana
... The crystalline basement west of São Paulo town is cut by a series of transcurrent shear zones (Figures 1 and 2). The Taxaquara shear zone was originally defined as separating the São Roque and Serra de Itaberaba groups ...
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SHRIMP zircon U Pb dating of the mafic and felsic intrusive rocks of the Saza area in the Lupa goldfields, southwestern Tanzania: Implication for gold mineralization
... The age cluster of ...Ma age of the mafic dykes represent the last magmatic event that concluded the evolution of the LGF and the entire Ubendian Belt during the Palaeo- proterozoic ...
7
Oligocene partial melting in the Takab metamorphic complex, NW Iran: Evidence from in situ U-Pb geochronology
... area. SHRIMP U- Pb dating of inherited zircon in the melanosome parts of mafic migmatites from the Takab complex gives a discordant age with an upper intercept of 296172 Ma ...precise ...
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Th-U-total Pb timing constraints on the emplacement of the granitoid pluton of Stolpen, Germany
... systematic age difference between BSE-dark and BSE-bright zones might suggest an involvement of a secondary process affecting the monazite chemistry and, consequently, the ages obtained; however, no such feature ...
16
SHRIMP U Pb and U Pb Laser Ablation Geochronological on Zircons from Monte Santo Alkaline Intrusive Suite, Westhern Araguaia Belt, Tocantins State, Brazil
... tion, mass discrimination and drift in ion counter gains and reduced to U–Pb isotope ratios by calibration to concordant reference zircons of known age, using protocols adapted from Andersen et al. ...
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Deciphering the geochronology of a large granitoid pluton (Karkonosze Granite, SW Poland): an assessment of U Pb zircon SIMS and Rb Sr whole rock dates relative to U Pb zircon CA ID TIMS
... available SHRIMP data using the ID-TIMS age of 312 Ma as a benchmark suggests that the observed scatter may be partly attributed to analytical and methodological problems, in particular failing to ...
51
Do U/Pb SHRIMP Dating and Pb Stepwise Leaching (PbSL) Analyses Confirm the Lack of Precambrian Basement Outcrops in Thailand?
... the SHRIMP II. For the zircon calibration the Pb/U ratios were norma- lized relative to a value of ...206 Pb/ 238 U ratio of FC1 reference zircons, equivalent to an age of ...
14
Anticlockwise P T evolution at ∼280 Ma recorded from ultrahigh temperature metapelitic granulite in the Chinese Altai orogenic belt, a possible link with the Tarim mantle plume?
... 2 The SHRIMP zircon U-Pb age dating yielded a concordant age of 278 ± 2 Ma, and supported that the UHT metamorphic event in the Chinese Altai occurred in the Permian... 3 The UHT metamor[r] ...
34
High-precision U–Pb ages in the early Tithonian to early Berriasian and implications for the numerical age of the Jurassic–Cretaceous boundary
... an age of ...the age of ash bed LY-5 (147.112 ± 0.078 Ma) can be regarded as an age in the early ...an age of ...an age of ∼ ...
14
Application of Multivariate Statistic of U, Th and Pb Concentrations and Pb Isotopic Signatures in the Assessment of Geogenic and Anthropogenic Sources in a U Mineralized Area
... the Pb isotopic tool, besides being used in any type of environmental matrices, is still promising in the investigation of indus- trial environmental impacts from mining as well as from physical, chemical and ...
12
U Pb Zircon Age, Geochemical and Sr Nd Isotopic Constraints on the Age and Origin of the Granodiorites in Guilong, Southeastern Yunnan Province, Southern China
... Felsic rocks (e.g., granite, granodiorite, etc.) are widely distributed in Honghe polymetallic deposits (super-large Sn, Cu, Pb, Zn, Sb, Ag, Mo, Au and Bi deposits) [1-6] and Bainiuchang super-large ...
12
Precise age for the Permian–Triassic boundary in South China from high-precision U-Pb geochronology and Bayesian age–depth modeling
... three-section age–depth models, we attempted to project the respective thickness corresponding to the UAZ1– UAZ4 interval in Meishan onto the two other ...the age–depth models of Dong- pan and Penglaitan, ...
18
Reply to Discussion on 'A high precision U Pb age constraint on the Rhynie Chert Konservat Lagerstätte: timescale and other implications'
... Emsian age), and a latest Pragian to (?)earliest Emsian age may be indicated by the presence of Dictyotriletes subgranifer amongst the recovered spore ...similar age to or younger than the Rhynie ...
9
SHRIMP U-Pb xenotime geochronology and its application to dating mineralisation, sediment deposition and metamorphism
... Three application studies of SHRIMP U-Pb xenotime geochronology using the matrix correction procedures developed were undertaken as a part of this study as well as a SHRIMP U-Pb detrital[r] ...
317
Study of Events and Phases in Robat-e Zengejeh Area (Southwestern Bardaskan)
... second age obtained by U- Pb geochronology (151±14 Ma) and previous results, it can be concluded that the late Cimmerian orogeny could be responsible for the low-grade (greenschist facies) ...
10
Benjamin_Thyer_Undergraduate_Thesis.docx
... ID-TIMS U/Pb geochronology; revealing increasingly complex crystallization histories of magmatic ...zircon U/Pb data (Mills and Coleman, 2013; Hallman, 2014) in order to investigate magmatic ...
32
A U Pb age for the Late Caledonian Sperrin Mountains minor intrusions suite in the north of Ireland: timing of slab break off in the Grampian terrane and the significance of deep seated, crustal lineaments
... A U-Pb age for the Late Caledonian Sperrin Mountains minor intrusions suite in the north of Ireland: timing of slab break-off in the Grampian terrane and the significance of deep-seated,[r] ...
38
Sequencing planetary accretion using chronology of ungrouped achondrites
... During and immediately following this planetesimal formation period (4564 Ma to 4562 Ma), the Solar System likely experienced numerous planetesimal collisions. Although the process of planetesimal collision is not ...
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