11/10/2023 0 Comments Earthtime maps![]() ![]() It is nothing fancy, but it allows users to see their exact location and view multiple cities simultaneously on a global map. This data set is delivered under the terms of the Open Government Licence, subject to the following acknowledgement accompanying the reproduced BGS materials: "Contains British Geological Survey materials © NERC ".EarthTime is an incredible application that allows a user to view their position in multiple countries around the globe. ![]() Text09_inverseGravTrac_MCfiles.m performs inversion of the gravimetric-tracer mixture data for these Monte Carlo simulations, saving the results in a tab-delimited text file for later parsing and interpretation.ĭiscovery Link to the dataset's BGS Discovery Metadata record.ġ0.5285/a483a041-170a-4072-844e-c2c5d070a3e3ĭr Daniel Condon (2016): Input data from the EARTHTIME uranium and lead (U–Pb) isotope tracer calibration experiment. Text08_inverseGravTracMC.m calculates the Monte Carlo simulations of the parameters with systematic uncertainties in the gravimetric solution – tracer inversion problem. Text07_inverseGravTrac_Mean.m calculates the maximum likelihood estimates of the model parameters for this inverse problem. Text06_inverseGravTrac.m populates variables and parameters used for inverting the tracer–gravimetric solution data to calculate the 235U/205Pb and 202Pb/205Pb of the tracers. Text05_TarantolaUIC.m performs Monte Carlo simulations of the U IC calculation in the previous code, with new simulations changing values of parameters with systematic uncertainties (see text). This code evaluates the maximum likelihood estimate of the U IC. Text04_TarantolaUIC_Mean.m inverts for the uranium IC (233/235 and 238/235) of the tracer using critical mixtures with U500 and CRM112a and measurements of the tracer uranium alone. Text03_BlankIC_ifyouknowtracer.m evaluates the multivariate overdispersion in the Pb Blank IC dataset, calculating a Pb Blank IC and uncertainty, along with covariance matrices. This script is run iteratively with the next code. Text02_BlankIC_LinearRegression.m regresses a 4–dimensional line through tracer–blank mixing data using the linear regression algorithm of McLean (2013) and overdispersion calculations of Vermeesch (2011). Text01_AmelinTarantola_MLE.m evaluates the Pb standard inter–calibration between NBS 981, NBS 982, and Puratronic Pb, using data from Amelin and Davis (2006). Metrology and Traceability of U–Pb Isotope Dilution Geochronology (EARTHTIME Tracer Calibration Part I) auxiliary materials (see above). The raw data is provided in Condon et al. The MATLAB workspaces (.mat files) consisting of parsed data are available from the authors for the EARTHTIME tracer calibration data. Evaluating Uncertainties in the Calibration of Isotopic Reference Materials and Multi–Element Isotopic Tracers (EARTHTIME Tracer Calibration Part II). This data set also contains a series of auxilliary files are MATLAB scripts that perform the algorithms described in a sister manuscript "McLean, N, Condon, D J, Schoene, B, and Bowring, S A, in-review. Ts06.xls U critical mixture isotope ratio data Ts05.xls Tracer–blank Pb isotope ratio data Ts04.xls GDMS elemental concentration data Ts03.xls Gravimetric–Tracer mixture isotope ratio data Ts01.xls Amelin and Davis (2006) Pb reference material isotope ratio data This data set contains isotope ratio data for the manuscript listed above. These data comprise the input measurement data for the EARTHTIME U–Pb Tracer Calibration experiment, the results of which are documented in the manuscript mentioned above. xls workbooks which contain the data auxiliary material for the manuscript "Metrology and Traceability of U–Pb Isotope Dilution Geochronology (EARTHTIME Tracer Calibration Part I)" by Daniel Condon, Blair Schoene, Noah McLean, Samuel Bowring and Randall Parrish, submitted to Geochimica et Cosmochimica Acta (June 2014). Input data from the EARTHTIME uranium and lead (U–Pb) isotope tracer calibration experiment What are we doing about climate change?.Understanding carbon capture and storage.What causes the Earth’s climate to change?.Donations and loans of materials collections.Integrated resource management in Eastern Africa.Rock Volume Characterisation Laboratory Cluster.Fluid and Rock Processes Laboratory Cluster.Equality, Diversity and Inclusion (EDI).MobileMenu Hosted sites BGS Shop News & Events ![]()
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