Results 61 to 70 of about 1,196 (195)

SHRIMP zircon geochronology of the Emeishan Large Igneous Province (SW China): implications for double mass extinctions in Late Permian [PDF]

, 2001
in http://www.lpi.usra.edu/meetings/gold2001/pdf/3519 ...
Kennedy, AK, Malpas, JG, Robinson, PT, Song, XY, Sun, M, Thompson, G, Yan, DP, Zhang, CJ, Zhou, MF   +8 more
core  

Crystal size and shape distribution systematics of plagioclase and the determination of crystal residence times in the micromonzogabbros of Qisir Dagh, SE of Sabalan volcano (NW Iran) [PDF]

, 2015
The Qisir Dagh igneous complex occurs as a combination of volcanic and intrusive rocks to the south-east of the Sabalan volcano, north-western Iran. Micromonzogabbroic rocks in the region consist of plagioclase, alkaline feldspar and clinopyroxene as the
Hassanzadeh, Jamshid, Mirnejad, Hassan, Pourkhorsandi, Hamed, Raiesi, Davoud   +3 more
core   +1 more source

Viscosity of Dry and Hydrous Diopside Melts at High Pressures: Implications for Upper Mantle Magma Dynamics

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 12, December 2025.
Abstract Viscosity of silicate melts governs magma transport and influences mantle dynamics, yet effects of pressure and water on melt viscosity remain poorly understood. Here, we report in situ falling‐sphere viscosity measurements on diopside (Di) melts with 0–3 wt.% H2O along the liquidus up to 7 GPa and 2103 K using synchrotron X‐ray radiography ...
Qi Chen, Bin Zhao, Tony Yu, Aaron Wolfgang Ashley, Yanbin Wang   +4 more
wiley   +1 more source

Origin and evolution of the deep thermochemical structure beneath Eurasia [PDF]

, 2017
A unique structure in the Earth’s lowermost mantle, the Perm Anomaly, was recently identified beneath Eurasia. It seismologically resembles the large low-shear velocity provinces (LLSVPs) under Africa and the Pacific, but is much smaller. This challenges
Bower, D. J., Flament, N., Gurnis, M., Müller, R. D., Williams, S.   +4 more
core   +2 more sources

Primitive magmas in the Emeishan Large Igneous Province, southwestern China and northern Vietnam

Lithos, 2010
There are several places in the Emeishan Large Igneous Province (ELIP) where highly magnesian volcanic or intrusive rocks accompany more abundant flood basalts. The high-Mg rocks vary in composition from LREE-depleted, low-Ti komatiites to LREE-enriched, high-Ti picrites.
Hanski, E., Kamenetsky, V., Luo, Z., Xu, Y., Kuzmin, D.   +4 more
openaire   +2 more sources

Rock‐buffered versus fluid‐buffered geochemistry of structurally controlled, hydrothermal dolomite: Insights from the Sichuan Basin, China

Sedimentology, Volume 72, Issue 7, Page 2087-2120, December 2025.
ABSTRACT Structurally controlled hydrothermal dolomitization, commonly driven by high‐pressure, high‐temperature fluid–rock reactions, offers insights into the tectonic evolution of sedimentary basins and the geochemical composition of their diagenetic fluids.
Huachuan Jiang, Jintong Liang, Karem Azmy, Cole A. McCormick, Taiyuan Fan, Xiaotian Li, Fei Huo, Huaguo Wen   +7 more
wiley   +1 more source

Comparison of γ-ray spectrometry and ICP-MS methods for measuring radioactive heat-producing elements of rocks: a case study on borehole samples from the Sichuan Basin, China [PDF]

, 2017
We compared the consistency of γ-ray spectrometry and inductively coupled plasma mass spectrometry by analyzing measurement results of the radioactive heat-producing elements U, Th, and K from borehole samples.
Hu, Shengbiao, Qiu, Nansheng, Xu, Ming, Zhu, Chuanqing   +3 more
core   +1 more source

Chemical heterogeneity of the Emeishan mantle plume: Evidence from highly siderophile element abundances in picrites [PDF]

, 2013
Highly magnesian lavas or picrites have the potential to preserve important information about the origin and thermochemical state of the mantle source(s) of large igneous provinces.
Ali, Amosse, Barnes, Becker, Bennett, Bezos, Boven, Brandon, Brandon, Brenan, Brenan, Bryan, Campbell, Campbell, Capobianco, Charlier, Chazey Iii, Chen, Chung, Coffin, Cohen, Creaser, Dale, Danyushevsky, Ely, Esser, Fan, Fiorentini, Frost, Hanski, Hanski, He, He, Herzberg, Herzberg, Ireland, Ireland, Jakobsen, Jakobsen, Jamais, Lassiter, Li, Li, Li, Lo, Maier, McDonough, McHone, Meisel, Momme, Momme, Momme, Norman, Pearson, Pitcher, Polat, Puchtel, Puchtel, Puchtel, Puchtel, Puchtel, Puchtel, Putirka, Putirka, Qi, Rehkamper, Richards, Righter, Shellnutt, Shellnutt, Shirey, Shirey, Song, Sun, Sun, Utskins-Peate, Volkening, Walker, Walker, Wang, Wang, Wang, Wang, Xiao, Xu, Xu, Zhang, Zhang, Zhang, Zhong, Zhong, Zhou, Zhou   +92 more
core   +2 more sources

Assessing the Reliability of the Pseudo‐Thellier Estimates in Fired Ceramics and Source Clays

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 7, July 2025.
Abstract The geomagnetic field's intensity is key to understanding the Earth's core dynamics and their surface impacts. While the Thellier–Thellier method remains the standard for recovering absolute paleointensity from baked materials, it is time‐consuming and may alter magnetic mineralogy due to heating cycles. The pseudo‐Thellier method offers a non‐
Wilbor Poletti, Mikaelly G. Rocha, Plínio Jaqueto, Gelvam A. Hartmann, Grasiane L. Mathias, Daniele Brandt, Ricardo I. F. Trindade, Paulo Maximiano   +7 more
wiley   +1 more source

Eruption, Emplacement and Internal Architecture of Massive and Super‐Massive Inflated Submarine Basalt Lava Flows, Walvis Ridge Hotspot Track, IODP Expeditions 391/397T

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 6, June 2025.
Abstract Massive submarine basalt flows were sampled at five sites on the Tristan‐Gough‐Walvis hotspot track in the South Atlantic by International Oceanic Discovery Program Expeditions 391/397T, where the plume was interacting with a mid‐ocean ridge, a setting similar to that the of modern Iceland.
John W. Shervais, Jesse L. Scholpp, Mike Widdowson, Wendy R. Nelson, Katherine E. Potter, Stephan Homrighausen, Drew White, David Buchs, Daniel E. Heaton, Aaron Avery, Rajneesh Bhutani, Robert A. Duncan, Cornelia Class, Mbili Tshiningayamwe, Yusuke Kubota, Xiao‐Jun Wang, Tao Wu, William W. Sager, Kaj Hoernle, Tobias Höfig   +19 more
wiley   +1 more source