Results 51 to 60 of about 5,424 (219)
Silicate-carbonate systems with bearing on the origin and crystallization of carbonatites [PDF]
, 1978 Experimental approaches attempt to determine the routes by which crustal carbonatite magmas can be derived from C02-bearing peridotite at high pressures.
Wyllie, P. J.
core
Геодинамика и тектонофизика, 2018 The TerraneChrone® (LA-ICP-MS) technique has been applied to carry out an integrated study of detrital zircons in sandstones sampled from the basal horizons of the stratotypical Riphean sequence in the Southern Urals, specifically the Navysh and Chudin ...
T. V. Romanyuk +4 more
doaj +1 more source
CRUSTAL CARBONATITES: DEFINITION, GEOLOGY, MINERALOGY, AND GEOCHEMISTRY
Геодинамика и тектонофизикаThis is a synopsis of the available data on crustal carbonatites, including their temporal and spatial distribution, mineralogy, geochemistry, and stable isotope (δ18O and δ13C) patterns.
E. V. Sklyarov, A. V. Lavrenchuk
doaj +1 more source
New Zealand Journal of Geology and Geophysics, Volume 69, Issue 2, June 2026.Clasts of albite‐porphyroblastic quartzofeldspathic schist, derived from the Otago Schist basement, occur within the Port Chalmers Breccia, a diatreme at the centre of the Dunedin stratovolcano, New Zealand. Schists have undergone varying degrees of replacement reactions (at temperatures of 300° to >500°C) producing hornfelses, with Ca‐ and K‐enriched ...
Alan F. Cooper
wiley +1 more source
Problems of search and diagnosis of carbonatites on the territory of Ukraine
Вісник Харківського національного університету імені В.Н. Каразіна. Серія Геологія. Географія. ЕкологіяReliably established carbonatites on the territory of Ukraine have characteristics inherent in this class of rocks, in particular, they are enriched with a fairly wide range of rare chemical elements, the most characteristic are rare earth elements and ...
Василь Загнітко
doaj +1 more source
To the problem of origin of the Bug series rocks
Геофизический журнал, 2019 The age of the Bug series rocks is an object for discussion. Isotopic methods do not give a distinct answer, because in the same outcrop, the same sample and even in the same crystal of zircon several dates of formation are to be found with evident ...
O. V. Usenko
doaj +1 more source
Ediacara Obscura: Unveiling Hidden Magnetisations in the Fen Complex, Southern Norway
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 5, May 2026.Abstract Paleomagnetic directions found in Ediacaran (635–539 Ma) rocks are widely dispersed, which has led to conflicting hypotheses about tectonic regimes and geomagnetic field behavior during this period, and raised doubts about the fidelity of the paleomagnetic record.
Justin A. D. Tonti‐Filippini +8 more
wiley +1 more source
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 4, April 2026.Abstract Tectonic CO2 Earth degassing is globally relevant and has probably controlled climate on a geological scale (Brune et al., 2019, https://doi.org/10.1038/s41561‐017‐0003‐6). Endogenous CO2 outgassing from rifting areas remains poorly constrained, with most available data from the East African Rift.
Lisa Ricci +6 more
wiley +1 more source
Petrology and geochemistry of selected nepheline syenites from Malawi and their potential as alternative potash sources [PDF]
, 2020 The Sub Saharan Africa agricultural sector is one of the most disadvantaged regions, partly due to high fertiliser import costs from the northern hemisphere.
Chiwona, Annock +3 more
core +1 more source
Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.Abstract The Wyoming Craton is often cited as an example of decratonization, implying the removal of its lithospheric keel. However, numerous geophysical imaging studies indicate the presence of thick mantle lithosphere beneath much of the Wyoming Craton.
M. J. Bezada +3 more
wiley +1 more source