We have carried out convenient and highly sensitive radon measurement using absorption to means of a detecting active charcoal and a liquid scintillation spectrometer, Packard Pico-rad System. The α and β radioactivities of its decay products originated from radon gas absorbed detector exposed to air were measured. Its detection limit is 1.7Bq/m in air with an accuracy of about 10% on 200 minit...

the eocene volcanic rocks from the southwest of the jandaq (kuh-e-godar-e-siah, central-east iran micro-continent) are andesitic basalt and andesite in composition. these rocks contain xenoliths with granulitic mineralogy. mineral assemblage of these xenoliths is plagioclase + phlogopite + corundum + sillimanite + chlorite + phengite with granublastic, poiklioblastic and foliated textures in th...

Sado Island is floating offshore of Niigata on Sea of Japan. This island is 855km2 and composed of Ko-sado (Small Sado) and O-Sado (Large Sado), and both them are arranged in a direction of NNE-SSW. This arrangement are parallel to Kakuda-Yahiko Range, south of Niigata City in the main land. O-Sado has the highest peak of more than 1100 m (Kinpokusan: 1172m), and Ko-Sado of 600 m high peak (Dai...

    Introduction Epithermal deposits are usually found in association with near-surface magmatic-hydrothermal environments with volcanic rocks. According to studies, their formation depth is less than 1.5 km and the temperature for their formation is less than 300 ° C. Epithermal deposits are usually rich in gold to gold-silver and rich in silver and include low sulfide, medium sulfide and hig...

Nagasari Volcano, part of the Dieng volcanic complex, is one unique volcanoes in Central Java. Around this volcano grow eruption craters, cones, and pyroclastic flow ridges. There were several 14 centers around Mount Nagasari, so it necessary to know development magmatism evolution. The aims research determine evolutionary magmatism. methodology used geological mapping petrographic analysis. ob...

Introduction. FIDO is the prototype rover for the Mars 2003 mission, complete with an Athena-like science payload [1]. FIDO will be deployed in April 1999 for a series of tests at Silver Lake, CA [2]. In preparation for these tests, we have examined a suite of rocks collected at the site to anticipate the problems expected in field analyses on available rock surfaces as opposed to surfaces that...

The straightforward but unexpected relationship presented here relates crustal thickness to magma type in the Izu-Ogasawara (Bonin) and Aleutian oceanic arcs. Volcanoes along the southern segment of the Izu-Ogasawara arc and the western Aleutian arc (west of Adak) are underlain by thin crust (10-20 km). In contrast those along the northern segment of the Izu-Ogasawara arc and eastern Aleutian a...

Precise Fe/Mn ratios and MnO contents have been determined for basalts from the Hawaiian shields of Ko’olau and Kilauea by inductively coupled plasma mass spectrometry. It is well known that the youngest Ko’olau (Makapu’u-stage) shield lavas define a geochemical endmember for Hawaiian lavas in terms of CaO and SiO2 contents and isotopic ratios of O, Sr, Nd, Hf, Pb, and Os. We find that their Mn...

Andesite rock is commonly used as a heritage building in Southeast Asia, especially Indonesia. However, the study on consolidation of andesite still limited. This aimed to evaluate application effectiveness TEOS-based material type materials. TEOS was modular system with powder form mortar. andesite-TEOS mortar applied conservation techniques, for gap and joint filling. 
 successfully rock...