Results 41 to 50 of about 208 (182)

Correlative Tomography for Polymineralic Inclusion Composition in Sublithospheric Diamonds

Geophysical Research Letters, Volume 52, Issue 11, 16 June 2025.
Abstract Sublithospheric diamonds and their inclusions are the deepest known samples from the Earth's mantle. Typically, the inclusions are trapped as minerals which are only stable in the deep mantle, retrogressing into multiple phases during their uplift. Determining the bulk inclusion composition is difficult but crucially important.
B. D. Rayner, S. C. Kohn, R. J. Garwood, A. D. Burnham, G. P. Bulanova, C. B. Smith, A. R. Thomson   +6 more
wiley   +1 more source

Deformation Controlled Fluid Mass‐Transfer Processes in Ancient Orogens

Geophysical Research Letters, Volume 52, Issue 6, 28 March 2025.
Abstract Despite abundant empirical evidence, the details of coupled deformation and mass transfer processes within a framework of the crustal architecture of ancient orogens remains enigmatic. Geophysical imaging of the Larder Lake‐Cadillac deformation zone, a well‐endowed crustal‐scale fault system in the Superior Province of the Canadian Shield ...
G. J. Hill, B. M. Frieman, E. A. Roots, P. E. Wannamaker, V. Maris, R. Haugaard, J. Kamm, R. Klanica, S. Kovacikova, A. J. Calvert, J. A. Craven, R. S. Smith   +11 more
wiley   +1 more source

POSSIBLE EVIDENCE FOR THE EXISTENCE OF VOLCANOGENIC MAGMATISM IN THE SINYAYA RIVER BASIN AT THE SOUTHERN FLANK OF THE VILYUI SYNECLISE

Геодинамика и тектонофизика, 2023
The results of different-extension geological survey, exploration and thematic work methods show that the Vilyui syneclise is relatively amagmatic. However, the recent factual evidence in this region indicates the occurrence of magmatism of a different ...
V. V. Baranov, V. S. Grinenko, V. P. Afanasiev, S. S. Ugapieva, N. P. Pokhilenko, N. V. Popov, N. V. Zayakina, T.  I. Vasilieva   +7 more
doaj   +1 more source

Water in Eclogite and Pyroxenite Xenoliths From the Bottom 100 km of the Slave Craton (Canada) Mantle Root

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 3, March 2025.
Abstract Major and trace elements, including H2O, were determined in garnet and clinopyroxene to constrain the evolution of mantle xenoliths from Diavik, Canada. The 20 samples, derived from 120 to 220 (240) km depth, define a geotherm equivalent to 37 mW/m2 surface heat flow and include three eclogite (A, B, C) and two pyroxenite (B, C) types (A: High
Esther Schmädicke, Jürgen Gose, Thomas Stachel   +2 more
wiley   +1 more source

The Characteristics and Classification of Spinel Group Minerals in Kimberlite in Wafangdian, Liaoning Province

Yankuang ceshi, 2014
According to crystal mineralogy theory, under the diagenetic environments with different physical and chemical conditions, crystal structure and chemical composition of spinel group minerals in kimberlite will be obviously different.
CHI Guang-cheng, WU Yue
doaj   +2 more sources

Mining and Climate Change Alters Water Storage and Streamflow Dynamics of Northern Peatland‐Dominated Catchments

Water Resources Research, Volume 60, Issue 12, December 2024.
Abstract The Hudson Bay Lowlands (HBL) of northern Ontario, a globally significant carbon store, are characterized by expansive peatland complexes of patterned bogs and fens, which play a vital role in regional water regulation. These peatlands are threatened by disturbance from large‐scale resource extraction and projected climate change, both of ...
O. F. Sutton, N. E. Balliston, J. S. Price   +2 more
wiley   +1 more source

Shock petrographic and numerical modeling constraints on the morphology and size of the Morokweng impact structure, South Africa

Meteoritics &Planetary Science, Volume 59, Issue 12, Page 3250-3281, December 2024.
Abstract The 369 m deep M4 drill hole, located ~18 km NNW of the center of the 146 Ma Morokweng impact structure (MIS), intersects shocked Archean granitoid gneisses and subsidiary dolerite intrusions that are cut by faults, cataclasites and mm‐ to m‐wide suevitic and pseudotachylitic breccia dikes.
Roger L. Gibson, S'lindile S. Wela, Auriol S. P. Rae, Marco A. G. Andreoli   +3 more
wiley   +1 more source

3‐D Subsurface Geophysical Modeling of the Charity Shoal Structure: A Probable Late Proterozoic‐Early Paleozoic Simple Impact Structure in Eastern Lake Ontario

Earth and Space Science, Volume 11, Issue 11, November 2024.
Abstract The Charity Shoal structure is a circular, ∼1.2‐km‐diameter, bedrock‐rimmed shoal in eastern Lake Ontario with a ∼20‐m‐deep central basin. The structure has been proposed as a possible Middle Ordovician impact crater or volcanic intrusion. We conducted marine seismic and magnetic surveys (9‐km2) and 3‐D geophysical modeling to better resolve ...
Mary H. Armour, Joseph I. Boyce, Phillip Suttak, Doug Hrvoic   +3 more
wiley   +1 more source

Kyanite-bearing eclogite xenoliths from the Udachnaya kimberlite, Siberian craton, Russia [PDF]

BSGF - Earth Sciences Bulletin, 2017
Xenoliths brought up by kimberlite magmas are rare samples of otherwise inaccessible lithospheric mantle. Eclogite xenoliths are found in most cratons and commonly show a range of mineral and chemical compositions that can be used to better understand ...
Radu Ioana-Bogdana, Moine Bertrand, Ionov Dmitri, Korsakov Andrey, Golovin Alexander, Mikhailenko Denis, Cottin Jean-Yves   +6 more
doaj   +1 more source

Magnetic surface geometry inversion of Kimberlites in Botswana

Geophysical Prospecting, Volume 72, Issue 9, Page 3524-3546, November 2024.
Abstract Surface geometry inversion of geophysical data has recently been introduced as an effective approach for generating surface‐based geological models. The models obtained through surface geometry inversion clearly delineate the contacts between distinct rock units, making them easily interpretable by geologists.
Saeed Vatankhah, Peter G. Lelièvre, Kitso Matende, Kevin Mickus   +3 more
wiley   +1 more source