2.1.2.3.3 Selection of input datasets


The major datasets used for the development of different regional and for the bioregion-wide three-dimensional models are listed in Table 8. A ‘tick’ denotes that a dataset was used for the development of a specific three-dimensional geological model, whereas a cross indicates that it was not used for this model.

The selection of datasets is primarily based on geographic area. However, it is important to note that datasets that represent an area outside a specific regional three-dimensional modeling domain but borders this area were in many instances still used for the development of a model to avoid model artefacts at the boundary of the model domain. For example, datasets from the Richmond river basin three-dimensional geological model were used to inform the model of the Logan-Albert river basin (and vice versa).

The selection is also related to the decision which hydrostratigraphic units are present in a particular area, and which units should be included in a specific model (Section 2.1.2.3.2). For example, a decision was made by the Assessment team not to include layers below the Walloon Coal Measures into the groundwater model of the Richmond river basin. The reason for this decision was that the Gatton Sandstone and the Koukandowie Formation are low-yielding aquitards or partial aquifers which contain highly brackish to saline groundwater, and no or very few groundwater bores are screened in these units (Figure 27 in Section 2.1.3 and companion product 2.6.2 for the Clarence-Moreton bioregion (Cui et al., 2016)). Therefore, these deeper layers below the Walloon Coal Measures were not represented in the three-dimensional geological model of the Richmond river basin, as the primary purpose of this model was to provide the layer structure for the numerical model. However, all major layers are represented in the bioregion-wide three-dimensional geological model.

Finally, another important criterion for the dataset selection was the timing when datasets became available for use in the Assessment. Some datasets, even though they are considered useful for the development of a specific regional three-dimensional model, were not available at the time when the model was developed. However, all datasets listed in Table 8 were integrated to inform the bioregion-wide three-dimensional geological model.

Table 8 Key datasets and references used in the development of regional and bioregion-wide three-dimensional geological models

A ‘Y’ indicates that a dataset (or a reference) was used for a particular model, whereas an ‘N’ indicates that it was not used.


Dataset name/description

Dataset number

Richmond river basin

Bioregion-wide model

South-East Queenslanda

Logan-Albert river basin

Clarence river basin

Clarence-Moreton SEEBASE & Structural GIS Project

3

Y

Y

Y

Y

Y

Metgasco Limited formation top grids

4

Y

Y

N

N

Y

NSW Tade and Investment formation top grids

5

N

Y

N

N

Y

NSW Geological Survey - geological units DRAFT line work

6

Y

Y

N

Y

Y

Metgasco Limited formation top re-interpretations

11

Y

Y

N

N

Y

CLM - Coal Bore Holes in QLD

12

N

Y

N

N

N

CLM - Coal Bore Holes in NSW

13

Y

Y

N

N

Y

BHP mineral exploration wells stratigraphy

14

Y

Y

N

N

N

CLM - QLD Surface Geology Mapsheets

15

Y

Y

Y

Y

N

CLM - Geology NSW and QLD combined

16

Y

Y

Y

Y

Y

CLM - Lamington Volcanics extent

17

Y

Y

N

Y

N

Digital Elevation Model (re-sampled at a 200 m resolution)

21

Y

Y

Y

Y

Y

CLM - Walloon Coal Measures extent

22

Y

Y

Y

Y

Y

CLM - Kangaroo Creek Sandstone extent

24

Y

Y

N

Y

Y

Queensland well completion reports

25

N

Y

Y

Y

N

CLM - Woogaroo Subgroup extent

26

N

Y

Y

Y

Y

NSW coal seam gas well completion reports

27

Y

Y

N

Y

Y

Fault surfaces

28

Y

Y

Y

Y

Y

Interpolated base of alluvial systems

29

Y

Y

Y

Y

Y

CLM - Lockyer Valley groundwater bore stratigraphy

30

N

Y

Y

Y

Y

CLM - Logan-Albert river basin groundwater bore stratigraphy

31

Y

N

N

N

N

CLM - Bremer river basin groundwater bore stratigraphy

32

N

Y

Y

Y

N

Richmond river basin groundwater bore stratigraphy

33

Y

Y

N

Y

Y

NSW CSG wells stratigraphy

34

Y

Y

N

Y

Y

Queensland CSG wells stratigraphy

35

N

Y

Y

Y

N

CLM - Gatton Sandstone extent

36

N

Y

Y

Y

Y

CLM - Alluvia extent

37, 38, 39, 40, 41

Y

Y

Y

Y

Y

CLM - Main Range Volcanics extent

42

Y

Y

Y

Y

Y

CLM - Koukandowie Formation extent

43

Y

Y

Y

Y

Y

CLM - Piora Member extent

44

Y

Y

N

Y

Y

CLM - Bungawalbin Member extent

45

Y

Y

N

Y

Y

O'Brien and Wells, 1994

na

Y

Y

Y

Y

Y

Ingram and Robinson, 1996

na

Y

Y

Y

Y

Y

athe model domain covers the Lockyer Valley, Bremer river basin and the Warrill Creek catchment

na = not applicable, and these rows refer to reports which provided critical input in the development of the three-dimensional geological models

Last updated:
11 July 2017
Thumbnail images of the Clarence-Moreton bioregion

Product Finalisation date

6 October 2016
PRODUCT CONTENTS