Detailed geochemical exploration of gold in the Arghash Anomaly 7, south of Neyshabour
Soleyman Kosari, Farnoush Farjandi
The study area is 3 square kilometers and located between 35 41' 07" to 35 42' 04"N and 58 36' 10" to 58 38' 08"E. This area is 4 Km away from the southwest of Cheshmehzard village and 2 Km away from southeast of Arghash village. The area is divided into two separate topographic and drainage basins; the eastern basin that comprises one third of the area and the western basin that comprises the remained zone. Generally the central portion is flat, while the eastern and western portions have high reliefs.
Available rocks belong to the lower to upper Eocene volcanic rocks including andesite, trachy-andesite, rhyodacite, and dacite. Alterations include argillic, chloritic, sericitic, and limonitic.
In the project 526 soil samples were collected from B and C horizons. Each 2000 m2 sampled by eight samples from center, corners and half-sides. This method has lowest errors of sampling for vein-type gold deposits.
Current report includes five chapters: generals, exploration steps, data processing and evaluation, interpretation, conclusion and suggestion. The maps were prepared using DATAMINE application. In addition to statistical analysis, the exploration pattern and evaluation of anomalous zones were done by especial methods described in chapter four.
Soil samples were analyzed by atomic absorption method. The result shows that gold is concentrated in three independent zones plotted in the map five. The first zone is largest anomaly that contains Au concentration about 17 times more than Clark.
Detailed description and results are included in the report.