Results 61 to 70 of about 798 (184)

MODELLING HEAT GENERATION DURING FRICTION AND VISCOPLASTIC DEFORMATION BASED ON THE EXAMPLE OF THE YENISEI SHEAR ZONE (EASTERN SIBERIA)

Геодинамика и тектонофизика, 2021
Deviations of the РТ parameters from the background values, corresponding to the lithostatic pressure and the standard geotherm characteristic of the neighboring crustal blocks of the Yenisei Ridge, were recorded by geothermobarometry in the zones of ...
O. P. Polyansky, A. V. Babichev, A. N. Semenov, V. V. Reverdatto   +3 more
doaj   +1 more source

Carbonic Fluids Drive Continental Carbon Cycling as Revealed by the Geochemistry of the Eclogite‐Garnet Peridotite Interface

Geophysical Research Letters, Volume 52, Issue 24, 28 December 2025.
Abstract Subduction zones regulate Earth's carbon distribution, yet the mechanism of carbon transfer from continental crust to mantle remains elusive. We examined an eclogite‐garnet peridotite interface from the Chinese Continental Scientific Drilling Program in the Sulu orogen, representing the slab–mantle wedge boundary formed during continental ...
Dong‐Bo Tan, Jing Lei, Yilin Xiao, Hai‐Ou Gu, He Sun, Xiangying Ye, Zeng‐Li Guo   +6 more
wiley   +1 more source

Geothermobarometry of basaltic glasses from the Tamu Massif, Shatsky Rise oceanic plateau

Geochemistry, Geophysics, Geosystems, 2013
We present the results of a petrological study of core samples from Tamu Massif (Site U1347), recovered during the Shatsky Rise Integrated Ocean Drilling Program (IODP) Expedition 324.
Anika Husen, Renat R. Almeev, François Holtz, Jürgen Koepke, Takashi Sano, Kurt Mengel   +5 more
doaj   +1 more source

Zircon and Melt Extraction From a Long‐Lived and Vertically Extensive Magma System Underneath Ilopango Caldera (El Salvador)

Geochemistry, Geophysics, Geosystems, 2021
The Tierra Blanca (TB) eruptive suite comprises the last four major eruptions of Ilopango caldera in El Salvador (≤45 ka), including the youngest Tierra Blanca Joven eruption (TBJ; ∼106 km3): the most voluminous event during the Holocene in Central ...
A. Cisneros de León, A. K. Schmitt, S. Kutterolf, J. C. Schindlbeck‐Belo, W. Hernández, K. W. W. Sims, J. Garrison, L. B. Kant, B. Weber, K.‐L. Wang, H.‐Y. Lee, R. B. Trumbull   +11 more
doaj   +1 more source

Uncertainties in the activities of garnets and their propagation into geothermobarometry

European Journal of Mineralogy, 1994
The effect of uncertainties in the activities of garnets on P-T estimates are explored by propagating the (co-)variances of an internally consistent set of the least squares-derived mixing parameters through the thermodynamic formulations of(1) the garnet-biotite geothermometer and (2) the garnet-Al 2 SiO 5 -plagioclase-quartz (GASP) geobarometer.
openaire   +1 more source

Geothermobarometry using minerals at non-equilibrium: a corona example

European Journal of Mineralogy, 2001
A simple extension of geothermobarometric technique is developed, from the usual case of assumed equilibrium among all minerals, to layered coronas with gradients of chemical potential. For reactions among end-members in the minerals, instead of the assumption of zero affinity (-δG) = 0, (-δG) ratios are used.
John R. Ashworth, Valentin S. Sheplev, Vladimir V. Khlestov, Vyatcheslav A. Ananyev   +3 more
openaire   +1 more source

Radiogenic Heating as the Thermal Driver of Himalayan Crustal Heating During Prolonged Thickening

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 11, November 2025.
Abstract The thermal evolution of the crust during continental collision evolves from cold to hot with time, which impacts crustal reworking and differentiation. However, it remains elusive as to the mechanism driving the crust to be hot during the protracted collision.
Shuaiqi Liu, Guibin Zhang, Lifei Zhang, Shuzhen Wang, Feng Chang   +4 more
wiley   +1 more source

Magma residence time, ascent rate and eruptive style of the November ash-laden activity during the 2021 Tajogaite eruption (La Palma, Spain)

Volcanica
We combined compositional analyses, crystal size distributions and geothermobarometry of tephra erupted during the 2021 Tajogaite eruption (La Palma, Spain), focusing on samples collected in November 2021 associated with a period of abundant ash emission
Barbara Bonechi, Margherita Polacci, Fabio Arzilli, Jorge Romero, Jonathan Fellowes, Mike Burton   +5 more
doaj   +1 more source

The Mg‐Fe Isotope Compositions and Geochemical Effects of Supercritical Fluids: Constraints From an Ultrahigh‐Pressure Eclogite‐Vein System in the Dabie Orogen

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 10, October 2025.
Abstract Supercritical fluids are ideal media for mass transfer from the subducting slab into the mantle wedge. However, little is known about the Mg‐Fe isotope compositions of supercritical fluids in subduction zones. Here, we present the Mg‐Fe isotope data for a coesite‐bearing eclogite‐vein system, which is closely associated with supercritical ...
Tie‐Nan Chen, Ren‐Xu Chen, Yong‐Fei Zheng, Zheng‐Hua Pan, Guo‐Chao Sun, Xue‐Jing Gan   +5 more
wiley   +1 more source

Geothermobarometry and development of inverted metamorphism in the Darjeeling-Sikkim region of the Eastern Himalayan

, 1989
The Darjeeling-Sikkim region provides a classic example of inverted Himalayan metamorphism. The different parageneses of pelitic rocks containing chlorite, biotite, garnet, staurolite, kyanite, sillimanite, plagioclase and K-feldspar are documented by a ...
Windley, B. F., Mohan, A., Searle, M. P.
core   +1 more source