Introduction: Returned extraterrestrial samples, planetary, asteroidal or cometary, are so valuable that initial assessment of the most appropriate analytical protocols for each grain is essential. It is particularly important to know the distribution and interrelationships of specific mineral components. Numerous sophisticated microanalysis techniques are now available [1], yet many may damage...

The very low frequency electromagnetic (VLFEM) technique is well established for rapid geological mapping and detection of buried conductive targets. The technique makes use of signal radiation from military navigation radio transmitters. There are about 42 global ground military communication transmitters operating in VLF frequency in the range of 15–30 kHz. These stations, located around the ...

Abstract Mineral distributions can be determined in drill core samples from a Carlin-type gold deposit, using micro-X-ray fluorescence (µXRF) raster data. Micro-XRF data were collected Bruker Tornado µXRF scanner on split (~25 × 8 cm) with at spatial resolution of ~100 µm. AMICS software was used to identify mineral species data, which revealed that many individual sample spots mixtures due the...

Introduction: Eucrite meteorites represent earlyformed (~4.557-4.565 Ga) crustal basalts and basaltic to gabbroic cumulates from the howardite-eucritediogenite (HED) parent body or bodies (e.g., [1]). The HED are commonly thought to originate from the asteroid Vesta (e.g., [2-3]), although O-isotopes for eucrites [4] and diogenites [5] indicate more than one parent body. Approximately 85% of eu...

The Carajás Mineral Province is located in the eastern portion of the Amazon craton, state of Pará and contains a significant number of mineral deposits, most of them exhibiting structural and lithological controls, such as sets of dilation faults. This paper presents the results of the interpretation of simulated MAPSAR (MultiApplication Purpose SAR) data, integrated with aerogeophysical data,...

Mineral physics dictate the appearance of rocks and soils across the electromagnetic spectrum. In the Visible/Near-Infrared (VNIR) and Short Wave Infrared (SWIR), many materials absorb radiation at specific wavelengths, allowing their identification by the position and character of absorption features. Electronic processes at wavelengths less ~1.0 micrometers allow (in addition to others) ident...

A positive identification of the minerals olivine, plagioclase, and several types of pyroxenes were made at several ocations on the lunar surface by using remote measurements. For example, the crater Aristarchus is found to have an average pyroxene composition of augite, and plagioclase is obviously present. A dark mantle deposit in the crater J. Herschel is at least partly composed of a mixtur...

Introd,uction During the 1955 field season the writer was engaged in mapping radioactive deposits in the Province of Quebec for the Quebec Department of Mines. Several hand specimens collected in the vicinity of St.Sim€oq' Charlevoix County, were found to show up to 20X normal radioactive background. The source of the radioactivity appeared to be a yellov/ translucent mineral present in small g...