Results 171 to 180 of about 657 (209)
Some of the next articles are maybe not open access.
Physics and Chemistry of the Earth, 1975
Abstract The model of a kimberlite pipe depicts a hypothetical pipe having a diameter of 300 m at a level equivalent to the post-erosional (present-day) surface of the major pipes in the Kimberley area. Below this reference level the pipe configuration and composition illustrate features typical of the Kimberley occurrences.
openaire +1 more source
Abstract The model of a kimberlite pipe depicts a hypothetical pipe having a diameter of 300 m at a level equivalent to the post-erosional (present-day) surface of the major pipes in the Kimberley area. Below this reference level the pipe configuration and composition illustrate features typical of the Kimberley occurrences.
openaire +1 more source
On the geological-prospecting types of kimberlite pipes
Proceedings of the Komi Science Centre of the Ural Division of the Russian Academy of Sciences, 2023The conducted research on geological structure and material composition of the Siberian platform kimberlites indicated the complexity and diversity of geologic-tectonic and paleogeographic conditions which should be considered when performing the prediction-prospecting works for diamonds in every particular region.
openaire +1 more source
Unaltered kimberlite of Internationalnaya pipe (Mirny field)
Ores and metals, 2021The porphyry kimberlite block (intrusive coherent kimberlite, after Scott-Smith, 2013) on the deep horizons of the Internationalnaya pipe is characterized by the lack of olivine macrocryst serpentinization, and the minimum degree of postmagmatic alteration in the matrix minerals.
Bogdan Pomazansky +7 more
openaire +1 more source
2020
<p>In this paper are summarized investigation results on the chemistry, petrography and mineralogy of kimberlitic rocks of the upper and deep levels of the Yubileynaya pipe. There are given original data on mineral phases contents in kimberlite ground mass,distribution of indicator minerals and olivine and its pseudomorphoses as ...
Zdislav Spetsius, Alexander Ivanov
openaire +1 more source
<p>In this paper are summarized investigation results on the chemistry, petrography and mineralogy of kimberlitic rocks of the upper and deep levels of the Yubileynaya pipe. There are given original data on mineral phases contents in kimberlite ground mass,distribution of indicator minerals and olivine and its pseudomorphoses as ...
Zdislav Spetsius, Alexander Ivanov
openaire +1 more source
Bitumens in the Mir Kimberlite Pipe (Yakutia)
Geochemistry InternationalSolid bitumen in the Mir kimberlite pipe form vein-like segregations several centimeters in size. They are distributed irregularly in the pipe body, regardless of the kimberlite breccia varieties distribution. Bitumen content in kimberlites ranges from 0.001 wt% to 0.12 wt%.
F. V. Kaminsky +3 more
openaire +2 more sources
A Phreatomagmatic Kimberlite: The A418 Kimberlite Pipe, Northwest Territories, Canada
2013The A418 kimberlite pipe, Northwest Territories, Canada, has a typical downward tapering morphology, has been explored to a depth of ~600 m where the pipe has a diameter of ~50 m, and is infilled by volcaniclastic deposits. The pipe-filling volcanic succession has a minimum volume of ~6 × 106 m3 and comprises structurally diverse deposits including ...
Lucy Anne Porritt +4 more
openaire +1 more source
KIMBERLITE SILLS AND DYKES ASSOCIATED WITH THE WESSELTON KIMBERLITE PIPE, KIMBERLEY, SOUTH AFRICA
South African Journal of Geology, 2012Field relations, petrography and bulk rock geochemistry constrain the emplacement mechanisms and petrogenesis of a kimberlite sill complex exposed in water tunnels at Wesselton Mine, Kimberley. The sill complex, together with associated dykes, is precursor to the main Wesselton pipe and contains: 1.
White, Jenny +5 more
openaire +2 more sources
The Geophysical Signature Of The Marsfontein Kimberlite Pipe
7th SAGA Biennial Technical Meeting and Exhibition, 2001The M1 kimberlite pipe is located on the farm Marsfontein near Potgietersrus in the Northern province. With a surface area of roughly 0.5ha, this is by no means an insignificant diamond deposit. Over 1.8 million carats were recovered from the start of the project in 1998 to the end of 2000.
openaire +1 more source
3rd SAGA Biennial Conference and Exhibition, 1993
The primary purpose of this study was to identify geophysical methods that were cheap, quick, readily available for use which would yield an indicative response over a known kimberlite. The following methods were selected for assessment: ground magnetics, self potential, radiometrics, horizontal loop electromagnetic (HLEM), and very low frequency (VLF)
openaire +1 more source
The primary purpose of this study was to identify geophysical methods that were cheap, quick, readily available for use which would yield an indicative response over a known kimberlite. The following methods were selected for assessment: ground magnetics, self potential, radiometrics, horizontal loop electromagnetic (HLEM), and very low frequency (VLF)
openaire +1 more source
Improvements in Search Techniques to Detect Kimberlite Pipes
81st EAGE Conference and Exhibition 2019, 2019Summary A review is made of traditional methods that have proven popular in aiding exploration for diamonds. Simple pattern recognition technique can be used to locate kimberlite pipes that have a magnetic response. Gravity tensor gradients have also started to be used.
D. FitzGerald, T. Meyer
openaire +1 more source