Results 81 to 90 of about 14,415 (244)
, 1969 One petrological approach to upper mantle studies is to determine which ultramafic rocks represent mantle material. Ultramafic rocks occur in a variety of field and petrographic associations: in recent reviews, Wyllie [1967b, 1968] outlined eleven ...
Wyllie, Peter J.
core
Internal vs. external forcing in shallow marine diatreme formation: a case study from the Iblean Mountains (SE-Siciliy, Central Mediterranean) [PDF]
, 2009 A model of diatreme evolution in a shallow marine setting is based on a multi-disciplinary analysis of diatremes in the Iblean Mountains (Sicily). The approach includes stratigraphic, volcanological, structural, petrologic and compositional data.
Schmincke, Hans-Ulrich, Suiting, Ines
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Hotspots and the evolution of the mantle [PDF]
Trace element patterns show that continental and ocean island basalts are complementary to mid-ocean ridge basalts (MORB). The relative sizes of the two source regions can be estimated from enrichment/depletion patterns.
Anderson, D. L.
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Mapping curie point depth of the west African Craton from satellite magnetic data and its implication for diamond exploration [PDF]
, 2015 The main objective of this work is to map the Curie depth of the West African Craton (WAC) using satellite magnetic data with the aim to provide first order evaluation, within this vast territory, for the spatial association between Curie-depth surface ...
Allek, K. +4 more
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Yankuang ceshi, 2013 The garnets in the kimberlites of the Wafangdian diamond mining area from Liaoning province have previously been identified as pyrope. In order to define the types of the complicated color garnets in Wafangdian, a systematic sampling and analysis of the ...
CHI Guang-cheng +6 more
doaj
Технічна інженеріяThe article discusses the use of geographic information systems in the study of kimberlite deposits in order to establish diamondiferous content based on indicator minerals, in particular olivine.
N.V. Zuievska +3 more
doaj +1 more source
Widespread PREMA in the upper mantle indicated by low-degree basaltic melts. [PDF]
Nat Commun, 2023 Cai R +5 more
europepmc +1 more source
About primary diamondiferousness of ancient platforms
Мінеральні ресурси України, 2016 As a result of carried out research and summary of the materials on specific features of diamonds, on the example of the Siberian platform, conclusions were made that indications exist at all levels of their location: from kimberlite – provinces, sub ...
M. M. Zinchuk, V. I. Koptil
doaj
Геофизический журнал, 2012 Characteristic of density distribution along latitudinal fault zones and estimated profiles has been given. Possibility has been found of north-south inclination of each of latitudinal fault zones.
V. I. Starostenko +4 more
doaj +1 more source
Thermal and mechanical structure of the upper mantle: A comparison between continental and oceanic models [PDF]
Temperature, velocity, and viscosity profiles for coupled thermal and mechanical models of the upper mantle beneath continental shields and old ocean basins show that under the continents, both tectonic plates and the asthenosphere, are thicker than they
Froidevaux, C. +2 more
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