Results 61 to 70 of about 48,565 (249)

Possible Jurassic age for part of Rakaia Terrane: implications for tectonic development of the Torlesse accretionary prism [PDF]

, 2001
Greywacke sandstone and argillite beds comprising Rakaia Terrane (Torlesse Complex) in mid Canterbury, South Island, New Zealand, are widely regarded as Late Triassic (Norian) in age based on the occurrence of Torlessia trace fossils, Monotis, and other ...
Kamp, Peter J.J., Peter J. J. Kamp
core   +1 more source

Zircon Hf and oxygen isotope time series

, 2023
Zircon isotopic time series (Hf and O) calculated using various change point and diversity measures. Time series constructed from zircon oxygen compliation of Spencer et al., (2022) and zircon Hf compilation of Cawood et al., (2022).
Christopher Kirkland (11458828)
core   +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

SHRIMP U-Pb zircon dating of Pedras Grandes Suite, southern Santa Catarina State, Brazil

Anais da Academia Brasileira de Ciências, 2005
Two major magmatic pulses of the granitic Florianópolis Batholith in Santa Catarina State, southern Brazil, occurred between 613±5Ma and 595±5 Ma, during the Neoproterozoic Brasiliano Cycle.
Andréa R. Jelinek, Artur C. Bastos-Neto, Jayme A.D. Leite, Léo A. Hartmann, Neal J. McNaughton   +4 more
doaj   +1 more source

Fluids in the Siilinjärvi carbonatite complex, eastern Finland: Fluid inclusion evidence for the formation conditions of zircon and apatite [PDF]

Bulletin of the Geological Society of Finland, 1995
In the studied zircon and apatite crystals, data recorded two different compositional types of fluid inclusions: Type 1 H2O-CO2 low salinity inclusions (XCO2 = 0.42 to 0.87; XNaCl = 0.001 to 0.005) with bulk densities of 0.73 to 0.87 g/cm3, and Type 2 ...
M. Poutiainen
doaj   +1 more source

Deformation Behavior across the Zircon-Scheelite Phase Transition

, 2016
The pressure effects on plastic deformation and phase transformation mechanisms of materials are of great importance to both Earth science and technological applications. Zircon-type materials are abundant in both nature and the industrial field; however,
Merkel, Sebastien, Yue, Binbin, Hong, Fang, Tan, Dayong, Yan, Jinyuan, Chen, Bin, Mao, Ho-Kwang   +6 more
core   +1 more source

Ti site occupancy in zircon [PDF]

, 2011
Ti site occupancy in zircon (ZrSiO4) is fundamental to thermobarometry because substitution mechanisms control Ti content-temperature relations. Here we describe the results of three independent methods used to demonstrate that Ti substitutes for Si and ...
Mavrogenes, J.A., Hermann, Joerg, Walker, A., J.A. Mavrogenes, H.St.C. O’Neill, Mavrogenes, J., Rodina, I S, Tailby, ND, K.A. Evans, Walker, Andrew M, Tailby, Nicholas, Tailby, N., Walker, AM, Rubatto, D, Evans, KA, Soldatov, A.V., Sutton, Stephen, Berry, A.J., Evans, K.A., O'Neill, Hugh, Berry, A., Evans, Katy, N.D. Tailby, Hermann, Jörg, Rubatto, Daniela, A.V. Soldatov, Rodina, I.S., S.R. Sutton, Rodina, IS, Sutton, SR, A.J. Berry, Soldatov, A., Berry, AJ, Hermann, J, Hermann, J., Sutton, S.R., Rubatto, D., Walker, A.M., O’Neill, H.S.C., Soldatov, AV, Sutton, S., Berry, Andrew John, J. Hermann, Tailby, N.D., Mavrogenes, JA, O'Neil, H., Rodina, I., I.S. Rodina, D. Rubatto, A.M. Walker, Mavrogenes, John, O'Neill, H St. C   +51 more
core   +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

Zircon Hf and O database

, 2022
Compiled database of zircon Hf and zircon δ18O. References included.
Christopher Spencer (12890531)
core   +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