Results 71 to 80 of about 7,282 (216)

REE minerals at the Songwe Hill carbonatite, Malawi: HREE-enrichment in late-stage apatite

, 2017
Compared to all published data from carbonatites and granitoids, the fluorapatite compositions in the Songwe Hill carbonatite, determined by EPMA and LA ICP-MS, have the highest heavy (H)REE concentration of any carbonatite apatite described so far.
S. Broom-Fendley, A. Brady, F. Wall, G. Gunn, W. Dawes   +4 more
semanticscholar   +1 more source

U-pb dating of niobium minerals from pyrochlor group (ilmeno-vishnevogorsk carbonatitis-miaskite complex, of the southern urals)

Литосфера, 2018
U-Pb dating of the pyrochlore-group minerals from the Nb-rare metal ore deposits of ilmeny-vishnevogorsky carbonatite-miaskite complex of the Ural fold region was carried out.
Irina L. Nedosekova, Viktor A. Koroteev, Boris V. Belyatsky, Viktor V. Sharygin, Еlena N. Lepechinа, Sergei V. Pribavkin   +5 more
doaj   +1 more source

Normalized pressure integral production analysis of triporate-uniphase parallel inter-porosity flow model

Youqicang pingjia yu kaifa, 2021
Normalized Pressure Integral（NPI） Production Analysis is a kind of modern production decline analysis method which defines new parameters by integral. It can not only reflect the pseudo-steady state flow stage influenced by outer boundary, but also can ...
FU Tianyu, LIU Qiguo, CEN Xuefang, LI Longxin, PENG Xian   +4 more
doaj  

Light rare earth element redistribution during hydrothermal alteration at the Okorusu carbonatite complex, Namibia

Mineralogical magazine, 2019
The Cretaceous Okorusu carbonatite, Namibia, includes diopside-bearing and pegmatitic calcite carbonatites, both exhibiting hydrothermally altered mineral assemblages.
Delia Cangelosi, S. Broom-Fendley, D. Banks, D. Morgan, B. Yardley   +4 more
semanticscholar   +1 more source

The East Greenland rifted volcanic margin [PDF]

Geological Survey of Denmark and Greenland Bulletin, 2011
The Palaeogene North Atlantic Igneous Province is among the largest igneous provinces in the world and this review of the East Greenland sector includes large amounts of information amassed since previous reviews around 1990.The main area of igneous ...
C. Kent Brooks
doaj  

Calcite-saturated natrocarbonatites: composition, crystal morphology, and weathering

Volcanica
Interpretation of calcite-dominated fossil carbonatite volcanoes is complicated by the instability of many igneous carbonatite materials on Earth’s surface.
Michael Anenburg, Izzan Nur Aslam
doaj   +1 more source

ZONATION OF PHLOGOPITE OF CARBONATITE-PEGMATITES OF THE BULDYM DEPOSIT OF THE VISHNEVYE MOUNTAINS (SOUTH URALS) [PDF]

Минералогия, 2017
In a plate 19 cm in size from the columnar crystal of phlogopite Buldym deposit in the Southern Urals, we studied the composition of alternating greenish-brown, yellowish-brown and darker brown areas by electron-probe microanalysis.
V.I. Popova, V.A. Kotlyarov, I.L. Nedosekova, V.A. Popov   +3 more
doaj  

Tremor signals reveal the structure and dynamics of the Oldoinyo Lengai magmatic plumbing system

Communications Earth & Environment
Earth’s only active carbonatite volcano Oldoinyo Lengai, Tanzania, is a peculiar endmember of volcanism in a young rift segment. Targeted by many petrological studies due to its effusive, cold carbonatite eruptions, its subsurface structure has only been
Miriam Christina Reiss, Corentin Caudron, Philip Hering, Diana Roman   +3 more
doaj   +1 more source

AGE AND GEODYNAMIC SETTINGS FOR FORMATION OF CARBONATITE COMPLEXES AND ASSOCIATED RARE METAL DEPOSITS OF THE SOUTH URAL

Геодинамика и тектонофизика
The Ilmen-Vishnevogorsky and Buldym carbonatite complexes occurring in the Southern Urals represent linear deformed carbonatite complexes. Their origin, as well as the age and geodynamic conditions remain the subject of debate.
I. L. Nedosekova
doaj   +1 more source

88th Annual Meeting of the Meteoritical Society 2026: Abstracts

Meteoritics &Planetary Science, Volume 61, Issue S1, Page S48-S551, August 2026.
wiley   +1 more source