Results 81 to 90 of about 394,950 (321)

Rb-Sr and Sm-Nd mineral isochron ages of a pegmatitic gneiss from Oku-iwa Rock, Lutzow-Holm Complex, East Antarctica

, 2006
P(論文)Oku-iwa Rock is located in the transitional zone between granulite- and amphibolite-facies metamorphic zones in the Lutzow-Holm Complex (LHC), East Antarctica. Hornblende biotite (HB) gneiss widely outcrops in the northern part of this area.
Kawano, Yoshinobu, Nishi, Naoko, Kagami, Hiroo   +2 more
core   +1 more source

Replacement of Ores Recorded by Textures and Chemical Compositions of Sphalerite: An Example From the Furutobe Kuroko Deposit, Akita, Japan

Geological Journal, EarlyView.
Coupled dissolution‐reprecipitation of early formed Cd‐, Fe‐, Ag‐ and Sb‐poor sphalerite through interaction with high‐temperature and high‐sulphur fugacity Cu‐rich fluids, responsible for the formation of the yellow ores, resulted in the formation of Cd‐, Fe‐, Ag‐ and Sb‐rich, heavily chalcopyrite‐diseased sphalerite and enrichment of critical metals ...
Manuel Nopeia, Ryohei Takahashi, Andrea Agangi, Pearlyn Manalo, Hinako Sato   +4 more
wiley   +1 more source

A Comparison of Microdrilling-TIMS/MC-ICPMS and LA-MC-ICPMS for Micro-sample Sr Isotope Measurement

Yankuang ceshi, 2014
Compared to the traditional strontium isotope analytical method, a micro-sample strontium isotope system study can reveal the heterogeneity of analyzed samples and is widely used in various fields of geology, such as crust-mantle interaction, genesis and
ZHANG Le, REN Zhong-yuan, DING Xiang-li, WU Ya-dong, LAI Yong-wang   +4 more
doaj   +2 more sources

Analysis of grape fruits and grape seed for their major , minor and trace elemental contact by XRF technique

مجلة بغداد للعلوم, 2011
Grapes and grape seeds are important samples employed for environmental medical studies . The air of this work was to identify and concentration calculation of the elements in grapes fruit and thier seeds by using X-Ray fluoresces technique (XRF ...
Baghdad Science Journal
doaj   +1 more source

Geochemical and Geological Investigation of Skarn‐Type Pb–Zn Mineralization in Hastanetepe (Balya‐Balıkesir, Türkiye): An Approach Based on Fluid Inclusions, Sulphur Isotopes and Geochemical Data

Geological Journal, EarlyView.
Integrated petrographic, mineralogical and geochemical data from the Hastanetepe Pb–Zn deposit (Balya, Türkiye) reveal multi‐stage hydrothermal alteration and a magmatic sulphur source. Fluid inclusion and sulphur isotope results indicate a complex fluid evolution responsible for skarn‐type Pb–Zn mineralization along limestone–dacite contacts ...
Esra Ünal‐Çakır
wiley   +1 more source

Mass measurements of neutron-rich Rb and Sr isotopes [PDF]

, 2016
We report on the mass measurements of several neutron-rich Rb and Sr isotopes in the A≈100 region with the TITAN Penning-trap mass spectrometer. By using highly charged ions in the charge state q=10+, the masses of 98,99Rb and 98-100 Sr have been ...
Simon, V. V., Leach, K. G., Bader, A., Pearkes, J., Klawitter, R., Seeraji, S., Chaudhuri, A., Kwiatkowski, A. A., Simon, M., Kwiatkowski, A., Macdonald, T., Schultz, B., Simon, M. C., Schultz, B. E., Fallis, J., Leach, K., Gallant, A., Lennarz, A., Dilling, J., Grossheim, A., Chowdhury, U., Brodeur, M., Lascar, D., Macdonald, T. D., Gallant, A. T., Simon, V.   +25 more
core   +1 more source

Geochemistry and Geochronology of Magmatic Rocks in Southwestern and Northeastern Cambodia: Implications for the Tectonic Evolution and Metallogenesis of the Loei Fold Belt

Geological Journal, EarlyView.
The composition of intrusive rocks suggests that the magma was likely generated in a subduction‐related setting. The arc crustal thickness in the Phnom Sro Ngam and Halo Prospects was probably < 40 km during emplacement. Zircon U–Pb age range indicates a correlation with Loei Fold Belt magmatic activity.
Sirisokha Seang, Khin Zaw, Kakda Kret, Ivan Belousov, Kotaro Yonezu, Koichiro Watanabe, Charles Makoundi   +6 more
wiley   +1 more source

Rb-Sr dating on the rocks in Japan (I),

The Journal of the Japanese Association of Mineralogists, Petrologists and Economic Geologists, 1967
Abstract: Geologic age measurements with the Rb-Sr method were made on micas and feldspars separated from granites, granite pegmatites, gneisses and schists of the South Western part of Japan. And the results indicate that the time of the igneous and metamorphic activities represented by these rocks are divided into five geologic periods: 1.
Hayase Ichikazu, Kyoichi Ishizaka
openaire   +3 more sources

New petrological data, Rb-Sr geochronology and isotope geochemistry (Sr, Nd) of the Ventosilla pluton (Sierra de Guadarrama, Spanish Central System)

, 1997
23ª Sesión Científica, Madrid 1997.Whole rock Rb-Sr Isotopic analyses on granites from Ventosilla pluton yield an age of 346 ± 63 Ma, and intercept at 0.708688 ± 0.00094. This age increases the time-span of the Hercynian plutonism in the area up to 70 Ma.
Reyes Hernández, Javier, Villaseca González, Carlos, Barbero González, Luis C., Santos Zalduegui, José Francisco   +3 more
core  

Rb-Sr systematics of volcanic rocks and alteration minerals of ODP Hole 104-642E

, 1989
Subaerially erupted tholeiites at Hole 642E were never exposed to the high-temperature seawater circulation and alteration conditions that are found at subaqueous ridges.
Johnson, E S, E S Johnson (7930439), LeHuray, A P, A P LeHuray (7929620)   +3 more
core   +1 more source