Results 91 to 100 of about 14,415 (244)

Rift-induced disruption of cratonic keels drives kimberlite volcanism. [PDF]

Nature, 2023
Gernon TM, Jones SM, Brune S, Hincks TK, Palmer MR, Schumacher JC, Primiceri RM, Field M, Griffin WL, O'Reilly SY, Keir D, Spencer CJ, Merdith AS, Glerum A.   +13 more
europepmc   +1 more source

A Record of Paleoproterozoic Subduction Preserved in the Northern Slave Cratonic Mantle: Sr–Pb–O Isotope and Trace-element Investigations of Eclogite Xenoliths from the Jericho and Muskox Kimberlites

, 2014
Paleoproterozoic eclogite xenoliths from the Jericho and Muskox kimberlites located in the northern Slave craton, Canada, display geochemical and isotopic evidence of a recycled oceanic lithosphere origin.
K. Smart, T. Chacko, A. Simonetti, Z. Sharp, L. Heaman   +4 more
semanticscholar   +1 more source

The formation of ore mineral deposits on the Moon: A feasibility study [PDF]

Most of the ore deposits on Earth are the direct result of formation by hydrothermal solutions. Analogous mineral concentrations do not occur on the Moon, however, because of the absence of water.
Lu, Fengxiang, Taylor, Lawrence A.
core   +1 more source

Melting of carbonated pelites at 8-13GPa: generating K-rich carbonatites for mantle metasomatism [PDF]

, 2018
The melting behaviour of three carbonated pelites containing 0-1wt% water was studied at 8 and 13GPa, 900-1,850°C to define conditions of melting, melt compositions and melting reactions.
Grassi, Daniele, Schmidt, Max
core  

Origin of nanosized diamonds in interstellar space and low-pressure-temperature Earth rocks [PDF]

, 2009
Nanosized diamond particles in the interstellar space and in the Earth rocks related with water presence. In the paper proposed the model of the nanosized diamond particle formation from oxidized water-carbon dioxide gaseous ...
Sergei Simakov
core   +1 more source

Synthesis of regional crust and upper-mantle structure from seismic and gravity data [PDF]

Analyses of regional gravity and magnetic patterns, LANDSAT images and geological information revealed two major lineaments crossing western Pennsylvania and parts of surrounding states.
Alexander, S. S., Lavin, P. M.
core   +1 more source

Thermal State and Thickness of the Lithospheric Mantle Beneath the Northern East-European Platform: Evidence from Clinopyroxene Xenocrysts in Kimberlite Pipes from the Arkhangelsk Region (NW Russia) and Its Applications in Diamond Exploration

Geosciences
This paper presents the reconstruction of the architecture of the lithospheric mantle, including its thermal state and thickness, as well as the scale and efficiency of its sampling by four kimberlites from the Arkhangelsk diamondiferous province ...
Elena Agasheva, Alyona Gudimova, Elena Malygina, Alexey Agashev, Alexey Ragozin, Elena Murav’eva, Anna Dymshits   +6 more
doaj   +1 more source

Evolving mantle convection from bottom up to top down. [PDF]

Innovation (Camb), 2022
Mitchell RN, Brown M, Gernon TM, Spencer CJ.   +3 more
europepmc   +1 more source

Kimberlitic olivine

, 2009
Kimberlite hosts two populations of olivine that are distinguished on the basis of grain size and morphology; the populations are commonly described genetically as xenocrysts and phenocrysts. Recent studies of zoning patterns in kimberlitic olivine phenocrysts have cast doubt on the actual origins of the smaller olivine crystals. Here, we elucidate the
openaire   +1 more source

A Machine Learning Approach to Single Garnet Geothermometry and Application to Tracing the Fingerprint of Superdeep Diamonds

Geochemistry, Geophysics, Geosystems
Estimating the equilibration temperatures of mantle‐derived garnets is crucial for assessing the diamond potential of kimberlites. Traditional garnet geothermometers require co‐existing mineral data or costly trace element analysis, limiting their ...
Qiwei Zhang, Matthew F. Hardman, Thomas Stachel, Ingrid Chinn, Michael Seller, Bruce Kjarsgaard, D. Graham Pearson   +6 more
doaj   +1 more source