HUN RMS Model Isochores v01

## **Abstract** 

The dataset was derived by the Bioregional Assessment Programme from a source dataset. The source dataset is identified in the Lineage field in this metadata statement. The processes undertaken to produce this derived dataset are described in the History field in this metadata statement. 



The data set contains the isochores shapefile of the well locations used in the structural geological model for the Hunter subregion. RMS geomodelling was used to construct the geological model for the Hunter subregion. The model was built using data extracted from well completions reports published by mining companies and consultants which record the depth of various formations encountered during drilling works. These data were compiled into model input files (See data set: Hunter deep well completion reports - f2df86d5-6749-48c7-a445-d60067109f08) used to build the RMS model including these isochores. The isochores dataset is a set of shapefiles representing the location of the wells and the depth of the formations at those locations.



Nine geological formations and their depths from the surface are included covering a grid across the Basin. The geological model is based on measured depths recorded in well completion reports published by mining companies and consultancies.



The naming convention refers to the geological age and depth (TVD ss = total vertical depth subsea reported to the Australian Height Datum) of the various formations as follows:



Regional horizon name 	Age (geological stage)	Newcastle Coalfield	                                Hunter Coalfield	                    Western Coalfield	                        Central or Southern coalfields 



M600	                       Top Anisian	                Top Hawkesbury Sandstone	                Top Hawkesbury Sandstone	    Top Hawkesbury Sandstone	Base Wianamatta Group

M700	                       Top Olenekian	                Base Hawkesbury Sandstone	                Base Hawkesbury Sandstone	    Base Hawkesbury Sandstone	Base Hawkesbury Sandstone

P000	                       Top Changhsingian	        Base Narrabeen Group	                        Base Narrabeen Group	            Base Narrabeen Group	                Base Narrabeen Group

P100	                       Upper Wuchiapingian	Base Newcastle Coal Measures	        Base Newcastle Coal Measures   Top Watts Sandstone	                Top Bargo Claystone

P500	                       Mid Capitanian	                Base Tomago Coal Measures	                Base Wittingham Coal Measures  Base Illawarra Coal Measures	Base Illawarra Coal Measures

P550	                       Top Wordian	                Base Mulbring Siltstone	                        Base Mulbring Siltstone	            Base Berry Siltstone	                Base Berry Siltstone

P600	                       Mid Roadian	                Base Maitland Group	                        Base Maitland Group	            Base Shoalhaven Group	        Base Shoalhaven Group

P700	                       Upper Kungurian	        Top Base Greta Coal Measures	        Top Base Greta Coal Measures		

P900	                       Base Serpukhovian	        Base Seaham Formation	                        Base Seaham Formation		



with 'M' referring to Mesozoic and 'P' to Paleozoic.

## **Dataset History** 

RMS geomodelling was used to construct the geological model for the Hunter subregion. The data set contains the isochores used in the geological model. The model was built using data extracted from well completions reports published by mining companies and consultants, which record the depth of various formations encountered during drilling works. These data were compiled into model input files (See dataset: Hunter deep well completion reports - f2df86d5-6749-48c7-a445-d60067109f08) used to build the RMS model. The isochores dataset is a set of shapefiles representing the location of the wells and the depth of the formations at those locations, derived from the well completion reports.

## **Dataset Citation** 

Bioregional Assessment Programme (2015) HUN RMS Model Isochores v01. Bioregional Assessment Derived Dataset. Viewed 22 June 2018, http://data.bioregionalassessments.gov.au/dataset/1912785b-d12f-4e96-bb6d-baf7897aa3a0.

## **Dataset Ancestors** 

* **Derived From** [Hunter deep well completion reports](https://data.gov.au/data/dataset/f2df86d5-6749-48c7-a445-d60067109f08)



Tags: Hunter subregion, New South Wales, economy, elevation, geoscientificInformation
Organization: Bioregional Assessment Program