Results 61 to 70 of about 2,508 (202)
Use of ERTS imagery for natural resources research and development in Lesotho [PDF]
The author has identified the following significant results. As far as the geological aspects of the project were concerned, the project was a success.
Jackson, A. A., Nixon, P. H.
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The state of the upper mantle beneath Southern Africa [PDF]
, 2006 We present a new upper mantle seismic model for southern Africa based on the fitting of a large (3622 waveforms) multi-mode surface wave data set with propagation paths significantly shorter (≤ 6000 km) than those in globally-derived surface wave models.
Debayle, E. +2 more
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Crater formation and erosional truncation of Arkhangelskaya kimberlite pipe (Russia)
Известия высших учебных заведений: Геология и разведка, 2019 The Late Devonian kimberlite pipes Arkhangelskaya, Pionerskaya, named after Grib, as well as a number of other pipes, have full sections of crater tufogenic and terrigenous deposits in the Zimneberezhny diamondiferous region, the thickness of which is ...
A. V. Bolonin +2 more
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Geological and Petrographic Characteristics of Kimberlite Pipes
Вестник Пермского университета. Геология, 2016 Studies of the geological structure and petrochemical composition of the Siberian Platform kimberlites indicated complexity, diversity of geological, tectonic, and paleogeographic situations, which must be considered for proper prospecting-exploration for diamonds in each area of investigation.
openaire +3 more sources
Research in volcanic geology, petrology and planetary science at MIT, 1969 to 1974 [PDF]
The behavior of volcanoes was studied by geologic mapping, petrologic investigations of lava and xenoliths, physical measurements, and theoretical modelling. Field observations were conducted in Alaska (Nunivak Island), Iceland, Hawaii (Mauna Kea), Italy
Mcgetchin, T. R.
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Styles of Alteration of Ti Oxides of the Kimberlite Groundmass: Implications on the Petrogenesis and Classification of Kimberlites and Similar Rocks [PDF]
, 2018 The sequence of replacement in groundmass perovskite and spinel from SK-1 and SK-2 kimberlites (Eastern Dharwar craton, India) has been established. Two types of perovskite occur in the studied Indian kimberlites.
Castillo Oliver, Montgarri +2 more
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Specific Internal Structure of Diamonds from Zarnitsa Kimberlite Pipe
Crystals, 2017 The Zarnitsa kimberlite pipe is one of the largest pipes of the Yakutian diamondiferous province. Currently, some limited published data exists on the diamonds from this deposit.
Alexey Ragozin +3 more
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Crystals, 2020 In this paper, we report a spectroscopic study of natural type Ib-IaA diamonds containing Y centers subjected to high-pressure high-temperature treatment at 7–7.5 GPa and 1700–2200 °C.
Igor N. Kupriyanov +3 more
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Геодинамика и тектонофизикаThe finds of giant CLIPPIR-type diamonds in the placers hosted by the Ebelyakh River basin in the north of Yakutia suggest that similar diamonds can be found in the kimberlites of the Anabar region and the nearest northern deposits located within the ...
A. S. Ivanov +5 more
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Геодинамика и тектонофизика, 2020 The complex of geophysical methods was successfully applied in the Alakit-Markha kimberlite field of the Yakutsk diamondiferous province. A pipe was identified in the local forecast area specified within the field at the previous stage of prospecting ...
K. Zh. Seminsky +3 more
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