Final Report - Geoscience BC

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4. RPDS Application4.1. General OverviewRPDS is designed to act as an integration platform to combine geophysical and geological datain order to effectively query rock property statistics for specific rock types across geographicareas. This allows for answering questions such as: What is the average density of basalts in theChilcotin area? or what is the average resistivity of a rhyolite in a VMS-type deposit? Thesetypes of questions are answered in RPDS by distillation of the large amount of data intomanageable, interpretable, queryable data tables. Figure 3 illustrates this distillation processshowing physical property logs for a theoretical borehole at depth including the associatedlithology, formation, and alteration information. Firstly, RPDS creates “geologic intervals” forcommon occurrences of lithology, formation, and alteration type (a geologic signature). Forexample, the first geologic interval is L1-F1-A1, the second is L2-F1-A2, and so on. Thisprocess is repeated at depth along the hole for each change in one of the geological variables.Then, for each interval, the physical property parameters are combined, calculating populationstatistics for that specific geological signature at that depth. The next phase of data distillationcombines each common interval, for example, all intervals with an L2-F1-A2 geologic signature(yellow zones on Figure 3) are combined, further summarizing the data. Next, the areaclassification (Country-Province-Area-Deposit) of each borehole is assessed and physicalproperties for all common geologic intervals across all holes within the same geographic area arecombined. Therefore physical properties of rocks with L2-F1-A2 signatures in the Sudburydeposit will not be combined with those having the same L2-F1-A2 signature in the Sullivandeposit. <strong>Final</strong>ly, this information is combined with the sample data having the same geologicalsignature for the same area. Therefore, all occurrences of L2-F1-A2 in any borehole or samplewithin the Bowser basin area in British Columbia are combined, providing, for example, onemean density value for a Sandstone with Argillic Alteration from the Brothers Peak Formationin the Bowser Basin area.12
Figure 3. Schematic diagram of a theoretical borehole showing the data distillation process performed in RPDS.4.2. Data ModelVarious tables in RPDS store information pertaining to all borehole and sample data entered intothe database. This information includes physical property data and metadata related to the entirelogging/sampling process (location, equipment, personnel, project descriptions, laboratorymethods, and processing/calibration history), as well as information related to geological units,and associated geochemical and geotechnical data. The simplified data model showing thesequence of tables used to generate the summary statistics described in the previous section isshown in Figure 4.13
Page 3 and 4: … modelling the earth310 Victoria
Page 5 and 6: … modelling the earthList of Figu
Page 7 and 8: 1. IntroductionPhysical rock proper
Page 9 and 10: 2. Project DeliverablesDeliverables
Page 11 and 12: GSC in the Fraser Delta region (dat
Page 13 and 14: (c)Data Summary by LocationArea of
Page 15: directories: ‘Input Data’, ‘O
Page 20 and 21: Wireline DataRPDSSample DataProcess
Page 22 and 23: 4.3. Web InterfaceAll data within R
Page 25 and 26: Appendix 1 - Rock Properties Worksh
Page 27 and 28: Appendix 2 - DVD Data ArchiveSee at
Page 29 and 30: … modelling the earthTable of Con
Page 31 and 32: … modelling the earth
Page 33 and 34: geophysical data. The geophysical m
Page 35 and 36: 3. Physical PropertiesProperty Meth
Page 37 and 38: surveys have excellent resolution o
Page 39 and 40: surveys are commonly calibrated by
Page 41 and 42: 5. Case Study of Mt. Milligan Porph
Page 43 and 44: merge into the background. Deposits
Page 45 and 46: Mount Milligan geologyFrom Jago (20
Page 47 and 48: Susceptibilty data for rock types m
Page 49 and 50: 4 1 9 . 7 12 55 07 51 0 01 2 51 5 0
Page 51 and 52: Mount Milligan synthetic models for
Page 53 and 54: Unconstrained synthetic model inver
Page 55 and 56: Detection of other targets - lower
Page 57 and 58: Detection of other targets - buried
Page 59 and 60: Mt. Milligan - unconstrained invers
Page 61 and 62: Constrained Inversion:Unconstrained

Final Report - Geoscience BC

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