Results 151 to 160 of about 18,220 (209)

Molecular Palaeontology Prospects From Exceptionally Preserved Eocene Brackish‐Water Bivalve Batissa sitakaraensis (Venerida: Corbiculidae) From Hokkaido, Japan

Geological Journal, EarlyView.
This study reports the exceptional preservation of the Eocene freshwater bivalve Batissa sitakaraensis from Hokkaido, Japan. Multimodal analyses reveal that both the aragonitic shell mineralogy and the delicate organic periostracum retain their original structural and chemical characteristics after millions of years.
Taro Yoshimura, Kazuki Hirota, Hiroyuki Kagi, Takashi Matsubara, Takenori Sasaki   +4 more
wiley   +1 more source

Geochemical Characteristics and Influencing Factors of Germanium in Early Permian Coal from the Southern Margin of the North China Craton Basin: Constraints from Coal Petrology, Mineralogy, and Germanium Isotopes. [PDF]

ACS Omega
Zhao S, Ran P, Wang C, Liu H, Hu G, Wu D.   +5 more
europepmc   +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

The Impact of Curing Conditions on the Microstructure and Resultant Macro-Performance of Manufactured Sand Concrete. [PDF]

Materials (Basel)
Chen H, Zhou J, Liu R, Wang J, Xiang Y.
europepmc   +1 more source

Late Pleistocene Volcanic Rocks From Tengchong Volcanic Field at SE Tibetan Plateau: Constraints on Petrogenesis and Mantle and Crustal Processes

Geological Journal, EarlyView.
Early zircon saturation and crystallisation occur in mafic (52–54 wt.% SiO2) lavas at Tengchong volcanic field. These early formed zircons with high δ18O (6.6‰–7.9‰) indicates mantle enrichment by subducted supracrustal materials. ABSTRACT Late Pleistocene (< 0.2 Ma) mafic and evolved volcanic rocks occur in northern Tengchong Volcanic Field, SE ...
Lizhu Wang, Haibo Zou
wiley   +1 more source

Parametric study of a new pressure relief borehole layout for high-stress roadway rockburst prevention. [PDF]

Sci Rep
Lu F, Dou L, Chai Y, Ma X, Cao J, Li H.
europepmc   +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

Apatite in Carbonatite Preserving Primary Magmatic, Post‐Magmatic Overgrowth, and Post India‐Asia Collision‐Related Hydrothermal Alteration: Evidenced From U–Pb Isotope and Trace Element Geochemistry

Geological Journal, EarlyView.
U–Pb isotope and trace element geochemistry of apatite from carbonatites of Peshawar Plain Alkaline Igneous Province, western Himalaya shows Permo‐Carboniferous magmatism, an additional magmatic pulse during Cretaceous, and post‐magmatic hydrothermal/metasomatism during Oligocene. ABSTRACT U–Pb isotope and trace element geochemistry of apatite combined
Mehboob ur Rashid, Hafiz U. Rehman, Hao‐Yang Lee, Sun‐Lin Chung, Kaushik Das, Kazumasa Aoki, Muhammad Jawad Zeb, Nasir Ahmad, Muhammad Hussain, Hiroshi Yamamoto   +9 more
wiley   +1 more source

A whole rock geochemical dataset for magmatic rocks drilled on the mid-Norwegian margin. [PDF]

Sci Data
Tegner C, Guo P, Chatterjee S, Lambart S, Jones MT, Planke S, Svensen HH, Neumann ER, Lesher CE, Cashman K, Takahashi T, Cunningham EH, Morris AM, Stokke EW, Millett JM, Mohn GTF, Longman J, Berndt C, Alvarez Zarikian CA, Betlem P, Ferré EC, Filina IY, Frieling J, Harper DT, Scherer RP, Varela N, Xu W.   +26 more
europepmc   +1 more source

Three‐dimensional hybrid perovskite heterostructure single crystals toward highly efficient x‐ray detectors

InfoMat, EarlyView.
This study presents for the first time a self‐assembled three‐dimensional perovskite heterojunction single crystal with organic cations and Pb coordination, (MHy)2Pb(2)Cl4·Pb(1)Cl2 (MPC). The MPC possesses carriers with different conformations and undergoes an ordered–ordered structural transition as the temperature increases, which ultimately realizes
Hang Li, Ji Qi, Qianwen Guan, Chengmin Ji, Huang Ye, Zhenyue Wu, Chengshu Zhang, Junhua Luo   +7 more
wiley   +1 more source