Results 61 to 70 of about 3,644 (268)
Геодинамика и тектонофизика, 2021 The article deals with the fundamental concepts of a new method of interpretation of regional gravimetry (scale 1:1000000) based on the idea of the deformational nature of low-frequency gravity anomalies.
S. M. Makeev
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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 +11 more
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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 +2 more
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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 +7 more
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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 +2 more
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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
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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 +3 more
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Cretaceous fossils from the Orapa Diamond Mine [PDF]
, 1997 Main articleThe Orapa kimberlite pipe, situated in north-central Botswana, is well-known for its rich reserves of diamonds. It is indeed one of the largest and richest diamond mines in the world.
Bamford, M. K. +6 more
core
Diamonds from Dachine, French Guiana : a unique record of Early Proterozoic subduction [PDF]
, 2016 This research was supported by NERC grant NE/J008583/1 to MJW and SCK.Diamonds from Dachine, French Guiana, are unique among worldwide diamond populations.
Bulanova, Galina P. +6 more
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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 +3 more
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