The Ramand region is a part of the magmatic belt in Urmieh-Dokhtar structural zone in Iran, located in the SW of BuinـZahra. This area mainly consists of felsic extrusions such as rhyolites and rhyodacites. Argillic alterations with occurrences of mineralized silica veins are abundant in most of the volcanic units. In this research work, we used the GIS facilities for modeling the Ramand geo-sp...

Detection of subsurface structures by means of gravity method can be used to determine mass distribution and density contrast of rock units. This distribution could be detected by different geophysical methods, especially gravity method. However, gravity techniques have some drawbacks and can't be always successful in distinguishing subsurface structures. Performance of the gravity technique co...

Geological intelpretationofmuluple geophysical and other auxiliary data sets has always ken a mnpler and ambiguous experience, even with good quality data sets. lhre are ~ever.4 quantitative methods of integrating gedogical and geophysical data sets for specific exploration targets: classical @ayesian) probability approach, Dempster-Shafer approach, kmy logic approach and AImpen system methods....

*Alaska Science Center, U.S. Geological Survey, 4210 University Drive, Anchorage, Alaska 99508, U.S.A. {Alaska Fire Service, Bureau of Land Management, P.O. Box 35005, Fort Wainwright, Alaska 99703, U.S.A. {Department of Meteorology, San Jose State University, San Jose, California 95192, U.S.A. 1Earth Surface Processes Team, U.S. Geological Survey, Denver Federal Center, Denver, Colorado 80225,...

Pletser et al. performed a seismic-refraction survey on Devon Island with the goal of assessing the feasibility of astronauts carrying out such operations on Mars to detect subsurface water. We demonstrate that the seismic analysis is fundamentally flawed. The survey performed in this test will likely bear little resemblance to future crewed geophysical surface operations, and better methods ex...

The Yeoncheon titanomagnetite deposit formed by Precambrian magma differentiation is located in Gyeonggi-do, South Korea. Our team conducted an airborne magnetic survey for multiscale mineral exploration and then selected a promising area. An electrical resistivity was carried out the potential area to image subsurface structure. Because ore minerals are mainly distributed gabbro monzodiorite r...

Geophysical data often contains both systematic and random errors. If left unchecked, the systematic errors can cause acquisition footprint in the final map. I present a method to estimate systematic error by analyzing measurements at points where two acquisition swaths cross. I then subtract the estimated systematic error from the data and generate a map with a familiar least squares formulati...