Results 91 to 100 of about 540,378 (271)

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

Effect of Sequential and Combined Space‐Based Stressors on Perovskite Solar Cell Stability

EcoEnergy, EarlyView.
A correlation between loss in performance and mobile ion concentration has been established by sequential stressing of perovskite solar cells under Low Earth Orbit conditions with exposure to protons, light, and thermal cycling. It is shown that the loss in performance increases when ion concentration increases and vice versa.
Saivineeth Penukula, Brandon K. Durant, Megh N. Khanal, Mohin Sharma, Todd A. Byers, Vincent R. Whiteside, Haley P. Harblin, Ian R. Sellers, Bibhudutta Rout, Nicholas Rolston   +9 more
wiley   +1 more source

MURMANO PLÜTONUNUN YAŞI VE OFİYOLİTLE OLAN İLİŞKİSİ (DİVRİĞİ-SİVAS)

Bulletin of the Mineral Research and Exploration, 1988
Sivas ili, Divriği ilçesinin birkaç km K-KB sında yer alan, bileşimi kuvars-siyenitle diyorit arasında değişen bileşik bir karaktere sahip olan Murmano plütonu, Divriği ofiyolit karmaşığına ait serpantinitler içerisine sokulum yapar.
H.P. ZECK, Taner ÜNLÜ
doaj  

First‐Principles Study of Novel A2CaTiH6 (A = Li, Na, K, Rb) Hydrides for Solid‐State Hydrogen Storage Applications

Energy Science &Engineering, EarlyView.
First‐principles investigation of A2CaTiH6 (A = Li, Na, K, Rb) hydrides reveals structural, electronic, mechanical, thermodynamic, and hydrogen storage properties. Negative formation energies confirm stability, while all compounds are metallic and mechanically stable. K2CaTiH6 and Rb2CaTiH6 are dynamically stable, with capacities of 2.28 wt.%–5.61 wt.%.
Nur Mohammad Riyad Kawsar, Sharmin Islam, Khalifa Raihan Afif, Istiak Ahmed Ovi, Mubasshirul Islam Shihab, Mohammad Sahedul Islam Sagor   +5 more
wiley   +1 more source

Study on the Factors Influencing the Separation of Sr and Nd in Sediments by Ion Exchange Resin

Yankuang ceshi, 2018
BACKGROUND In geological studies, Sr and Nd isotopes are classical isotopic dating and tracer systems. OBJECTIVES The traditional separation method usually uses the AG50W-X8 resin to elute and separate Sr and REEs in sediments, and then uses Sr-special ...
YIN Peng, HE Qian, HE Hui-jun, ZHAO Zhi-qi   +3 more
doaj   +1 more source

Modelling the petrogenesis of high Rb/Sr silicic magmas [PDF]

, 1991
Rhyolites can be highly evolved with Sr contents as low as 0.1 ppm and Rb/Sr > 2,000. In contrast, granite batholiths are commonly comprised of rocks with Rb/Sr 100.
Holden, Peter, Halliday, Alexander N., Davidson, Jon P., Hildreth, W.   +3 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

Rb–Sr and U–Pb dating of bentonites

, 1983
A 6 in. (15 cm) bentonite in the Z coal (Cretaceous–Tertiary boundary) in eastern Montana was sampled at four different places, and biotite, sanidine, and zircon were separated from the clay.
H. Baadsgaard, J. F. Lerbekmo
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

A Reassessment of Petrochemistry of ~1.2 Ga Tonalitic Rocks of the Northern Tugela Terrane, Natal Metamorphic Belt, South Africa: Further Constraints on the Evolution of This Belt

Geological Journal, EarlyView.
Our petrochemical studies on ~1.2 Ga granitoids of the Natal Metamorphic Belt, South Africa, do not suggest any property similar to Phanerozoic‐style subduction‐related granitoids. Plot of Kotongweni Tonalite in Y versus Sr diagram (after Moyen 2011), note that most samples have Sr/Y < 50.
Palesa Leuta, Saumitra Misra, Thembiso O. Basupi   +2 more
wiley   +1 more source