Türkiye 36. evrensel enlem zonundan elde edilen BLEG ve -80 Mesh dere tortulu örneği analiz sonuçlarının parametrik ve parametrik olmayan yöntemlerle değerlendirilmesi

As expressed by numerous researchers, fine-grained stream sediment sampling occupies its first place for geochemical sampling environment at ore deposit discovery surveys in most part of the earth. In gold and silver investigation, the analysis of Bulk Leach Extractable Gold (BLEG) settles in the first place whereas acid-extractable gold in minus eighty mesh stream sediment fraction has been commonly used during follow up of the BLEG results. The Eskisehir-Sivrihisar region in Western Turkey includes several orogenic type mineral deposits including gold-bearing quartz vein systems. Using a geochemical database generated through company's exploration campaigns, this research compares the capability of conventional statistical techniques Mean + 2STD, Median + 2MAD) and principal component analysis (PCA), with number- concentration (N-S) fractal and concentration-area (C-A) methods and singularity index (SI) method to differentiate anomalous and background gold distributions or define areas with geochemical signals related to mineralization (given singularity index mapping does not define threshold values). Gold mineralizations discovered in the area of interest in the past were re-uncovered by BLEG gold stream sediment anomalies, which have used robust singularity indices with C-A and N-S multifractal modeling and PCA. Eighty-five percent of the gold deposits were defined using either BLEG silver or less than one hundred eighty micrometers stream sediment silver data. Conventional approaches to anomaly detection for the BLEG and less than one hundred eighty micrometers stream sediment data failed to detect a number of significant deposits, including some in the vicinity of Sivrihisar.