The dataset was derived by the Bioregional Assessment Programme. The parent datasets are 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.
This dataset is comprised of interpreted extents, contours, and elevation grids, for the major Triassic and upper Permian units of the Galilee Geological Basin.
This dataset was created to provide formation extents for aquifers in the Galilee geological basin.
A Quality Assurance (QA) and validation process was conducted on the original well and bore data to choose wells/bores that are within 25 kilometres of the BA Galilee Region extent.
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Well data
a. Obtained excel file "QPED_July_2013_galilee.xlsx" from GA
b. Based on stratigraphic information in "BH_costrat" tab formation names were regularised and simplified based on current naming conventions.
c. Simplified names added to QPED_July_2013_galileet.xlsx as "Steve_geo" and "Steve_group"
d. Produced new file "GSQ_Geology.xlsx" contained decimal latitude and longitude, KB elevation, top of unit in metres from KB, top of unit in metres AHD, bottom of unit in metres from KB, bottom of unit in metres AHD, original geology, simplified geology, simplified Group geology.
i. KB obtained from "BH_wellhist"
ii. Where no KB information was available ie KB=0, sample the 1S DEM at the well's location to obtain height. KB=DEM+10. Marked well as having lower reliability.
iii. Calculated Top_m_AHD = KB - Top_m_KB
iv. Calculated Bottom_m_AHD = KB - Bottom_m_KB
e. Brought GSQ_Geology.xlsx into ArcGIS
f. Selected wells based on "Steve_geo" field for each model layer to produce a geodatabase for each layer.
i. GSQ_basement_wells
ii. GSQ_top_joe_joe_group
iii. GSQ_top_bandanna_merge
iv. GSQ_rewan_group
v. GSQ_clematis
vi. GSQ_moolyember
g. Additional wells and reinterpreted tops added to appropriate geodatabase based on well completion reports
h. Additional wells added to coverages to help model building process
i. Well_name listed as Fake
ii. Exception being GSQ_top_basement_fake which was created as a separate geodatabase
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Bore data
a. Obtained QLD_DNRM_GroundwaterDatabaseExtract_20131111 from GA
b. Used files REGISTRATIONS.txt, ELEVATIONS.txt and AQUIFER.txt to build GW_stratigraphy.xlsx
i. Based on RN
ii. Latitude from GIS_LAT (REGISTRATIONS.txt)
iii. Longitude from GIS_LNG (REGISTRATIONS.txt)
iv. Elevation from (ELEVATIONS.txt)
v. FORM_DESC from (AQUIFER.txt)
vi. Top from (AQUIFER.txt)
vii. Bottom from (AQUIFER.txt)
c. Brought GW_stratigraphy.xlsx into ArcGIS
d. Created gw_bores_galilee_dem
i. Sampled 1S DEM to obtain ground level elevation column RASTERVALU
ii. Created column top_m_AHD by RASTERVALU - Top
e. Selected bores based on "FORM_DESC" field for each model layer to produce a geodatabase for each layer.
i. Gw_basement
ii. GW_bores_joe_joe_group
iii. GW_bores_bandanna
iv. Gw_bores_rewan
v. Gw_bores_clematis
vi. Gw_bores_moolyember
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Georectified seismic surfaces
a. Extracted interpreted seismic surfaces for base Permian (interpreted as basement) and top Bandanna (in time) from the following seismic surveys
i. Y80A, W81A, Carmichael, Pendine, T81A, Quilpie, Ward and Powell Creek seismic survey downloaded https://qdexguest.deedi.qld.gov.au/portal/site/qdex/search?searchType=general
ii. Brought TIF images into ArcGIS and georectified
iii. Digitised shape of contours and faults into geodatabase
1. Basement_contours and basement_faults
2. bandanna_contours_new_data and bandanna_faults
iv. Added field "contour" to geodatabase
v. Converted contours to depth in "contour" field based on well and bore data (top_m_AHD) and contour progression
vi. Use the shape and depth derived from OZ SEEBASE to help to add additional contours and faults to basement and bandanna datasets
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Additional contour and fault surfaces were built derived from underlying surfaces and wells/bore data
a. Joejoe_contours and joejoe)faults
b. Rewan_contour_clip (used bandanna_faults as fault coverage)
c. Clematis_contour and clematis_faults
d. Moolyember_contour (used clematis_faults as fault coverage)
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Surface geology
a. Extracted surface geology from QUEENSLAND GEOLOGY_AUGUST_2012 using Galilee BA region boundary with 25 kilometre boundary to form geodatabase QLD_geology_galilee
b. Selected relevant surface geology from QLD_geology_galilee based on field "Name" for each model layer and created new geodatabase layers
i. Basement_geology: Argentine Metamorphics,Running River Metamorphics,Charters Towers Metamorphics; Bimurra Volcanics, Foyle Volcanics, Mount Wyatt Formation, Saint Anns Formation, Silver Hills Volcanics, Stones Creek Volcanics; Bulliwallah Formation, Ducabrook Formation, Mount Rankin Formation, Natal Formation, Star of Hope Formation; Cape River Metamorphics; Einasleigh Metamorphics; Gem Park Granite; Macrossan Province Cambrian-Ordovician intrusives; Macrossan Province Ordovician-Silurian intrusives; Macrossan Province Ordovician intrusives; Mount Formartine, unnamed plutonic units; Pama Province Silurian-Devonian intrusives; Seventy Mile Range Group; and Kirk River beds, Les Jumelles beds.
ii. Joe_joe_geology: Joe Joe Group
iii. Galilee_permian_geology: Back Creek Group, Betts Creek Group, Blackwater Group
iv. Rewan_geology: Rewan Group
1. Later also made dunda_beds_geology to be included in Rewan model: Dunda beds
v. Clematis_geology: Clematis Group
1. Later also made warang_sandstone_geology to be included in Clematis model: Warang Sandstone
vi. Moolyember_surface_geology: Moolyember Formation
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DEM for each model layer
a. Using surface geology geodatabase extent extract grid from dem_s_1s to represent the top of the model layer at the surface
i. Basement_dem
ii. Joejoe_dem
iii. Bandanna_dem
iv. Rewan_dem and dunda_dem
v. Clematis_dem and warang_dem
vi. Moolyember_surface_dem
b. Used Contour tool in ArcGIS to obtain a 25 metre contour geodatabase from the relevant model DEM
i. Basement_dem_contours
ii. Joejoe_dem_contours
iii. Bandanna_dem_contours
iv. Rewan_dem_contours and dunda_dem_contours
v. Clematis_dem_contours and warang_dem_contours
vi. Moolyember_dem_contours
c. For the purpose of guiding the model building process additional fields were added to each DEM contour geodatabase was added based on average thickness derived from groundwater bores and petroleum wells.
i. Basement_dem_contours: Joejoe, bandanna, rewan, clematis, moolyember
ii. Joejoe_dem_contours: basement, bandanna
iii. Bandanna_dem_contours: joejoe, rewan
iv. Rewan_dem_contours and dunda_dem_contours: clematis, rewan
v. Clematis_dem_contours and warang_dem_contours: moolyember, rewan
vi. Moolyember_dem_contours: clematis
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