Stable

Borehole geometry

Submitted by chee.ng on Thu, 02/11/2023 - 15:05

This vocabulary covers the common terminology and concepts used in the mineral and energy industries to fully depict the 3D extent of a borehole (i.e. its position in space and the depth reached) or the position of any point along the borehole. The list focuses on the primary and some derived/calculated parameters that are part of reporting for drilling activities, and does include specific processes/procedures related to the acquisition of some of these parameters (e.g. downhole directional survey).

Location method

Submitted by chee.ng on Thu, 02/11/2023 - 14:07

Methods used to spatially locate features observed in the field (e.g. site/outcrop descriptions, structural readings, etc.), data obtained from legacy documents (e.g. airphotos, maps, previously published reports), or the position of exploration, mining and related infrastructure features. Each location method has a spatial accuracy that indicates the maximum estimated approximate error in the location.

Geoscience units of measurement

Submitted by chee.ng on Thu, 02/11/2023 - 14:05

A list of units of measurement (UoM) relevant for geoscience and the administration of statutory submissions from the resource industries. The list is based on the Geological Survey of Queensland (GSQ) Geoscience Profile of the Quantities, Units, Dimensions & Types (QUDT) ontology and vocabularies lists (https://linked.data.gov.au/def/geou and https://www.qudt.org/doc/DOC_VOCAB-UNITS.html - version 2.1.29).

JORC Code

Submitted by chee.ng on Thu, 02/11/2023 - 14:02

The Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves ('the JORC Code') is a professional code of practice that sets mandatory, minimum standards for Public Reporting of minerals Exploration Results, Mineral Resources and Ore Reserves, according to the levels of confidence in geological knowledge and technical and economic considerations.

Tectonic unit type

Submitted by chee.ng on Thu, 02/11/2023 - 14:00

This vocabulary lists the types of tectonic and lithotectonic units that are used to define the geological framework / 4D evolution of Western Australia and are relevant to the duties of the Geological Survey of Western Australia (GSWA). A tectonic unit is defined as a named mass/body of rock with defined geological characteristics (geological structure, sedimentary stratigraphy, magmatic activity, metamorphism, metallogeny and alteration) and evolutionary history different from that of surrounding/contiguous units.

Metamorphic thermal regime style

Submitted by chee.ng on Thu, 02/11/2023 - 13:58

Terms that describe the ratio of temperature to pressure (T/P) during metamorphism, defining a classification scheme based on thermal gradient that is regarded as the most appropriate for building a temporal geodynamic context for metamorphic data. Some of these terms only partly correspond to metamorphic facies fields and classic-style terminology such as Barrovian and Buchan (i.e. correspondence is not one-for-one).

Metamorphic stage

Submitted by chee.ng on Thu, 02/11/2023 - 13:56

Terms used to describe the stage of metamorphism of rocks based on the nature of the change in pressure and temperature conditions to which the rocks are subjected. Definitions are taken or derived from:
Fettes, D and Desmons, J (eds.) 2007, Metamorphic Rocks: a classification and glossary of terms — Recommendations of the International Union of Geological Sciences Subcommission on the Systematics of Metamorphic Rocks: Cambridge University Press, 244p.

Metamorphic facies

Submitted by chee.ng on Thu, 02/11/2023 - 13:33

A metamorphic facies is defined by a repeatedly occurring and thus predictable set of stable mineral assemblages in metamorphic rocks. Such metamorphic mineral assemblages crystallize and are stable over a range of externally imposed physical conditions, most crucially lithostatic pressure and temperature, and thus the facies define areas in two-dimensional plots of pressure–temperature space. There is a demonstrable/proven relationship between mineral composition and bulk rock chemical composition and a consistent relationship through geological time.

CRIRSCO mineral resource reporting

Submitted by chee.ng on Thu, 02/11/2023 - 13:30

Terminology defined by the Committee for Mineral Reserves International Reporting Standards (CRIRSCO; https://www.crirsco.com/) based on the International Reporting Template (IRT; https://www.crirsco.com/docs/CRIRSCO_International_Reporting_Template_November_2019.pdf). The IRT is a document that draws on the best of the CRIRSCO-style reporting standards, the JORC Code (Australasia), SAMREC Code (South Africa), Reporting Code (UK / Western Europe), CIM Guidelines (Canada), SME Guide (USA) and Certification Code (Chile).