This is an interpolated grid of Nd two-stage model ages, based on whole-rock Nd isotopic analyses from felsic magmatic rocks, particularly focusing on I- and A-type granites and volcanic rocks. The data provides an estimate of the timing of extraction from the mantle of the middle to lower crustal source regions from which the felsic melts were generated. The point data used for the interpolation is the “felsic igneous rock” subset of the Sm-Nd data held in the Isotopic Atlas as of February 2021. Point data added to the Isotopic Atlas after February 2021 is not represented in this grid. The grid was generated with Esri's ArcMap Spatial Analyst interpolation tool using the Natural Neighbor algorithm and 0.01 degree cell size. Two classifications are provided for this grid; a Jenks natural breaks classification with ten classes (classification 1) as per Champion (2013) http://pid.geoscience.gov.au/dataset/ga/77772, and; the same nine-class interval binning and colour scheme applied to the source point data in the Sm-Nd Isotope Data layer (classification 2).

This is an interpolated grid of Lu-Hf two-stage model ages, based on (primarily zircon) Lu-Hf isotopic analyses from igneous rocks. The data provides an estimate of the timing of extraction from the mantle of the middle to lower crustal source regions from which the melts were generated. The point data used for the interpolation is the median magmatic T2DM data of the summary Lu-Hf dataset held in the Isotopic Atlas as of February 2021. Point data added to the Isotopic Atlas after February 2021 is not represented in this grid. The grid was generated with Esri's ArcMap Spatial Analyst interpolation tool using the Natural Neighbor algorithm and 0.01 degree cell size. Two classifications are provided for this grid; a Jenks natural breaks classification with ten classes (classification 1) as per Champion (2013) http://pid.geoscience.gov.au/dataset/ga/77772, and; the same three-class interval binning and colour scheme applied to the source point data in the Lu-Hf Isotopes - Summary Data layer (classification 2).

A compilation of full analytical data tables for publicly-available Sm-Nd isotope data from Geoscience Australia (GA), State and Geological Surveys, and from literature-compiled sources. Each result links to information about the sample (including unit name, lithology and age), sample collection site, method of analysis, analytical errors, associated Reference Standards and analytical values, and references for location, age data, and the source publication information. Refer to Champion (2013) for further details: http://pid.geoscience.gov.au/dataset/ga/77772. Note that intervals used for the T2DM, Residence Age and Crystallisation Age are rounded to the nearest 100 Ma.

This is an interpolated grid of Pb-Pb model age data from primarily ore-related rocks and minerals. The point data used for the interpolation is from the Pb-Pb dataset held in the Isotopic Atlas as of February 2021, and the model ages are calculated using Stacey and Kramers (1975) Pb-evolution model. Point data added to the Isotopic Atlas after February 2021 is not represented in this grid. The grid was generated with Esri's ArcMap Spatial Analyst interpolation tool using the Natural Neighbor algorithm and 0.01 degree cell size. Two classifications are provided for this grid; a Jenks natural breaks classification with ten classes (classification 1) as per Champion (2013) http://pid.geoscience.gov.au/dataset/ga/77772, and; the same six-class interval binning and colour scheme applied to the source point data in the Pb-Pb Isotope Data layer (classification 2).

Analytical data tables for publicly-available Sr-isotope data from Geoscience Australia (GA). Each result links to information about the sample, analytical metadata, and the source publication. Refer to de Caritat et al. (2022) for further details: http://pid.geoscience.gov.au/dataset/ga/71912.

Analytical data tables for publicly-available Sr-isotope data from Geoscience Australia (GA). Each result links to information about the sample, analytical metadata, and the source publication. Refer to de Caritat et al. (2022) for further details: http://pid.geoscience.gov.au/dataset/ga/71912.

A compilation of full analytical data tables for publicly-available Sm-Nd isotope data from Geoscience Australia (GA), State and Geological Surveys, and from literature-compiled sources. Each result links to information about the sample (including unit name, lithology and age), sample collection site, method of analysis, analytical errors, associated Reference Standards and analytical values, and references for location, age data, and the source publication information. Refer to Champion (2013) for further details: http://pid.geoscience.gov.au/dataset/ga/77772. Note that intervals used for the T2DM, Residence Age and Crystallisation Age are rounded to the nearest 100 Ma.

This is an interpolated grid of Nd two-stage model ages, based on whole-rock Nd isotopic analyses from felsic magmatic rocks, particularly focusing on I- and A-type granites and volcanic rocks. The data provides an estimate of the timing of extraction from the mantle of the middle to lower crustal source regions from which the felsic melts were generated. The point data used for the interpolation is the “felsic igneous rock” subset of the Sm-Nd data held in the Isotopic Atlas as of February 2021. Point data added to the Isotopic Atlas after February 2021 is not represented in this grid. The grid was generated with Esri's ArcMap Spatial Analyst interpolation tool using the Natural Neighbor algorithm and 0.01 degree cell size. Two classifications are provided for this grid; a Jenks natural breaks classification with ten classes (classification 1) as per Champion (2013) http://pid.geoscience.gov.au/dataset/ga/77772, and; the same nine-class interval binning and colour scheme applied to the source point data in the Sm-Nd Isotope Data layer (classification 2).

This is an interpolated grid of Pb-Pb model age data from primarily ore-related rocks and minerals. The point data used for the interpolation is from the Pb-Pb dataset held in the Isotopic Atlas as of February 2021, and the model ages are calculated using Stacey and Kramers (1975) Pb-evolution model. Point data added to the Isotopic Atlas after February 2021 is not represented in this grid. The grid was generated with Esri's ArcMap Spatial Analyst interpolation tool using the Natural Neighbor algorithm and 0.01 degree cell size. Two classifications are provided for this grid; a Jenks natural breaks classification with ten classes (classification 1) as per Champion (2013) http://pid.geoscience.gov.au/dataset/ga/77772, and; the same six-class interval binning and colour scheme applied to the source point data in the Pb-Pb Isotope Data layer (classification 2).

This is an interpolated grid of Lu-Hf two-stage model ages, based on (primarily zircon) Lu-Hf isotopic analyses from igneous rocks. The data provides an estimate of the timing of extraction from the mantle of the middle to lower crustal source regions from which the melts were generated. The point data used for the interpolation is the median magmatic T2DM data of the summary Lu-Hf dataset held in the Isotopic Atlas as of February 2021. Point data added to the Isotopic Atlas after February 2021 is not represented in this grid. The grid was generated with Esri's ArcMap Spatial Analyst interpolation tool using the Natural Neighbor algorithm and 0.01 degree cell size. Two classifications are provided for this grid; a Jenks natural breaks classification with ten classes (classification 1) as per Champion (2013) http://pid.geoscience.gov.au/dataset/ga/77772, and; the same three-class interval binning and colour scheme applied to the source point data in the Lu-Hf Isotopes - Summary Data layer (classification 2).