Metadata : Northern Territory Geological Survey - Geochemistry - Rockchip (Surface)

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Metadata Details:

Name: AS/NZS ISO 19115 Geographic Information - Metadata, ANZLIC Metadata Profile

Version: 1.0

Date Metadata Extracted: 2020-08-03

Date Metadata Last Updated: 2020-03-13

Current URL (HTML format) : http://www.ntlis.nt.gov.au/metadata/export_data?type=html&metadata_id=66C94CC5DC66D278E050CD9B21446429

Current URL (XML format) : http://www.ntlis.nt.gov.au/metadata/export_data?type=xml&metadata_id=66C94CC5DC66D278E050CD9B21446429


Citation

ANZLIC Identifier: 66C94CC5DC66D278E050CD9B21446429

Title: Northern Territory Geological Survey - Geochemistry - Rockchip (Surface)

Citation Date: 2017-10-16

Date Type: revision

Custodian: Department of Primary Industry and Resources


Description

Abstract:

Northern Territory Geological Survey (NTGS) Geochemistry datasets contain information on available open file geochemical data from companies and/or the NTGS collected on surface samples, where Sample Method may be described as rock chip sampled from surface / outcrop. The data is captured by the NTGS via compulsory reporting from exploration companies or analyses done by NTGS geologists.
Geochemical datasets consist of major elemental oxides, trace and rare earth element abundances collected on surface rock samples.

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Dataset Status

Dataset ID:

Language: English

Character Set: Latin 1

Progress: onGoing

Maintenance and Update Frequency: weekly

Data Currency Start Date: 2017-03-14

Data Currency End Date:

Access Constraint: Only open file data available.

Copyright Northern Territory of Australia (Northern Territory Geological Survey) 2020. With the exception of the Northern Territory of Australia logo, other government and corporate logos and where otherwise noted, all material in this publication is provided under a Creative Commons Attribution 4.0 International licence (https://creativecommons.org/licenses/by/4.0/legalcode). You are free to re-use the work under the licence, on the condition that you attribute the Northern Territory of Australia (Northern Territory Geological Survey) and comply with the other licence terms.

Disclaimer: While all care has been taken to ensure that information contained in this publication is true and correct at the time of publication, changes in circumstances after the time of publication may impact on the accuracy of its information. The Northern Territory of Australia gives no warranty or assurance, and makes no representation as to the accuracy of any information or advice contained in this publication, or that it is suitable for your intended use. You should not rely upon information in this publication for the purpose of making any serious business or investment decisions without obtaining independent and/or professional advice in relation to your particular situation. The Northern Territory of Australia disclaims any liability or responsibility or duty of care towards any person for loss or damage caused by any use of, or reliance on the information contained in this publication.


Data Quality

Lineage: Sample and assay data are captured from both open file company exploration reports and NTGS projects. Exploration data is extracted from legacy hardcopy reports by scanning and digitising, including spatial data capture from maps where necessary. Legacy data capture has been completed at various times and usually on a geological terrain basis. More recent exploration reports and data are supplied in digital formats and have been uploaded directly into a database after transcription to a standard loading template. NTGS data is primarily for rock samples undergoing whole rock geochemical analysis. NTGS undertake QA/QC on NTGS collected samples involving assessing precision and accuracy of techniques through internationally recognised standard reference materials and NTGS in house standards, including the identification of duplicates and blanks. Data is transferred to into a database. Data is validated twice, at the template stage (before entry) and during loading into the database. Data is extracted using ETL tools and loaded into STRIKE as well as file based outputs including MapInfo table and ESRI shapefile formats, available from the NT Wide Downloads page.
From late 2014, a major data cleansing and validation project was carried out. Duplicate records and those records missing certain mandatory attributes were removed. Some missing attribute data was added after checking against the original reports. Other attribute data was standardised.

Positional Accuracy: Approximately 20-150m metres using 100K topographical maps or GPS. Decimal latitudes and longitudes are available for each site.

Attribute Accuracy: Analysis is performed by laboratories to set standards. Geological observations and descriptive attributes noted by resource/mapping geologists.

Logical Consistency: Data is logically consistent for the purposes of geological interpretation.

Completeness: Data is as complete as possible for each record. Data cannot be entered without all the mandatory fields being completed. Data is not entered into a database without location data. All sample types are available in the Northern Territory Geochemistry Datasets, Digital Information Package 001 (DIP001). Drill samples are not available on STRIKE (NTGS web mapping data delivery and viewing application http://strike.nt.gov.au). Due to the flat file nature of the STRIKE layers and those included in DIP001 the laboratory method information is not included for each assay and the original source will need be checked. Reports can be searched and downloaded via GEMIS (geoscience.nt.gov.au/gemis).


Contacts

NameOrganisationPositionRolePhoneFaxEmail
Manager Geoscience Business SystemsDepartment of Primary Industry and ResourcesManager Geoscience Business Systemscustodian(08) 8999 5211(08) 8999 6824geoscience.spatial@nt.gov.au

Data Dictionary

AttributeAttribute DescriptionPossible CodeCode Description
PCTThis applies for all columns named with the convention of element_PCT e.g. AG_PCT (Unit of Measure of Percentage)-9998 to 0 Percentage (PCT) values that fall below 0 into negative values (excluding -9999) demonstrate that the concentration is below the detection limit of the technology available
-9999Represents a NULL for elements that have not been analysed in a sample
0 to +999,999.99 Percentage (PCT) values can range between +999,999.99 and 0. These positive values mean that the concentration of chemical element is high enough to be detected if measured by technology available
PPBThis applies for all columns named with the convention of element_PPB e.g. AG_PPB (Unit of Measure Parts Per Billion)
Percent, parts per million (PPM) and parts per billion (PPB) values that fall below 0 into negative values (excluding -9999) demonstrate that the concentration is below the detection limit of the technology available
-9998 to 0Parts per billion (PPB) values that fall below 0 into negative values (excluding -9999) demonstrate that the concentration is below the detection limit of the technology available
-9999Represents a NULL for elements that have not been analysed in a sample
0 to +999,999.99Parts per billion (PPB) values can range between +999,999.99 and 0. These positive values mean that the concentration of chemical element is high enough to be detected if measured by technology available
PPMThis applies for all columns named with the convention of element_PPM e.g. AG_PPM (Unit of Measure Parts Per Million)
Percent, parts per million (PPM) and parts per billion (PPB) values that fall below 0 into negative values (excluding -9999) demonstrate that the concentration is below the detection limit of the technology available
-9998 to 0Parts per million (PPM) values that fall below 0 into negative values (excluding -9999) demonstrate that the concentration is below the detection limit of the technology available
-9999Represents a NULL for elements that have not been analysed in a sample
0 to +999,999Parts per million (PPM) values can range between 0 and +999,999.99. These positive values mean that the concentration of chemical element is high enough to be detected if measured by technology available
PPT This applies for all columns named with the convention of element_PPT e.g. AG_PPT (Unit of Measure Parts Per Trillion)-9998 to 0Parts Per Trillion (PPT) values that fall below 0 into negative values (excluding -9999) demonstrate that the concentration is below the detection limit of the technology available
-9999Represents a NULL for elements that not been analysed in a sample
0 to +999,999.99Parts per Trillion (PPT) values can range between +999,999.99 and 0. These positive values mean that the concentration of chemical element is high enough to be detected if measured by technology available

Supplementary Information


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