b'NewsGeophysics in the surveysSo, what about those other scenarios?observed gravitywhich we can dodown on a 2D map it is generally di\x1bcult Where both the elevation and gravity arein an optimisation exercise with theto see gravity and we just see a line of out? In the instance where this happened,three Bouguer gravities and numerousdisturbance correlating to the position of we have no report and have resorted toassumptions about which equationsa road. Again, we dont delete them from comparing nearby points and elevationwere usedand then reload and check, athe databasetheyll still be attached to models. Im loath to relevel a gravityprocess Im informally dubbing back-un- pdfsjust when were making the state survey without robust justi\x1ecation, butrelevelling. This is a work in progress. grid well (generally) leave them out, or in this one case Ive looked at empiricalgrid them at a lower resolution so they evidence (i.e., nearby points) andRegarding discrete red and blue dots,blend in. calculated average di\x1ferences and usedthese either occur as a single discrete that to relevel the survey. When thepoint of anomalous gravity, or they occurAnd thats about it. The 2024 SA gravity Bouguer Gravity is calculated and griddedwhere two traverses cross and dont matchrelease and report are well underway. we get an improved dataset, but its notat the crossover. If we had the funding,Ngaityalyaperfect. There are still busts. In this caseId take our CG5s and DGPS gear out and(Kaurna, thank you)well probably just mute the survey, thatvisit all these points. For the moment, Ive is, switch it to grid \x1cag = no, so the datadiscreetly muted some of those pointsPhilip Heath is available but doesnt get included inand have crossed my \x1engers that I haventGeological Survey of South Australiathe state grid. just hidden the worlds largest superE Philip.Heath@sa.gov.audeposit hosting every possible commodity Heres another one. This one is from 1991.ever. If youd like to look at these points, The gravity is out by about 8 mGals andI recommend downloading the currentReferencesthe elevation is out by approximatelystate grid because it will be replaced with 1m but when we dig up the original \x1elea new version soon. Katona, L.F. 2017. Gridding of South Australian we \x1end that it doesnt include observedGround Gravity Data, using the Supervised gravity values. There are Bouguer GravityRegarding roads, gravity surveys alongVariable Density Method. Report Book values calculated for crustal densityroads are great. You can plot them up and2017/00012. Department of the Premier and models at 2.20, 2.40, and 2.67 grams/cc. model a fault or whatever and thats \x1ene.Cabinet, South Australia, Adelaide. So now we need to back calculate theIn 1D theyre OK. When we view them topSARIG: https://map.sarig.sa.gov.au/22 PREVIEWAPRIL 2024'