HUN RMS Model Isopachs Grids v01

## **Abstract** 

The dataset was derived by the Bioregional Assessment Programme from the Hunter RMS geological model. You can find a link to the parent dataset in the Lineage Field in this metadata statement. The History Field in this metadata statement describes how this dataset was derived.



The data set contains the ESRI grid versions of the isopachs extracted from 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.



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



Coordonate system: GDA_1994_MGA_Zone_56

## **Dataset History** 

RMS geomodelling was used to construct the geological model for the Hunter subregion. The data set contains the isopachs extracted from the completed geological model in ESRI grid format. 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.



This model has a horizontal resolution of 2000 x 2000 m (x y), with 109 vertical layers for a total of 511,118 cells. The depth ranges between 1185m above sea level and 5062 m below sea level.



Data originally sourced from 44 well completion reports and incorporated into the geological model. The reference horizons were exported from RMS software as .dat files and converted to ESRI grids.

## **Dataset Citation** 

Bioregional Assessment Programme (2015) HUN RMS Model Isopachs Grids v01. Bioregional Assessment Derived Dataset. Viewed 22 June 2018, http://data.bioregionalassessments.gov.au/dataset/840b82b4-b336-4458-93e3-f89b0b776873.

## **Dataset Ancestors** 

* **Derived From** [Geoscience Australia, 3 second SRTM Digital Elevation Model (DEM) v01](https://data.gov.au/data/dataset/12e0731d-96dd-49cc-aa21-ebfd65a3f67a)

* **Derived From** [Australian Coal Basins](https://data.gov.au/data/dataset/9d5a8d74-a201-42bd-9d49-3c392244be16)

* **Derived From** [Bathymetry GA 2009 9sec v4](https://data.gov.au/data/dataset/60fb8bf5-b97d-49c9-b7fb-e7d594d2c75b)

* **Derived From** [Hunter Groundwater Model extent](https://data.gov.au/data/dataset/6d4a8c97-f7ea-4840-9de9-af6f7b18b8d6)

* **Derived From** [South Sydney Deep Well Completion Reports V02](https://data.gov.au/data/dataset/110bca9d-c0c1-49e9-888c-2b3a8ae706f7)

* **Derived From** [HUN RMS Output Dat Files v01](https://data.gov.au/data/dataset/c975d250-b699-4585-b32f-cbfde4d8d436)

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

* **Derived From** [HUN GW modelling DEM v01](https://data.gov.au/data/dataset/f0927e8a-cc41-419b-ae68-660d5d5fa47b)



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