Results 101 to 110 of about 51,695 (270)
Application of palynological techniques for correlation of coal seams in the Lower Lignite Creek area, Nenana Coal Field [PDF]
, 1980 This study concerns spores and pollen in the coals of the lower Lignite Creek area in the Nenana Coal Field, which is operated by Usibelli Mining Company.
McFarlane, R., Sanders, R., and Rao, P.D.
core
Paleomagnetic dating of rocks of the Bolshesyrsky magmatic area of the Minusinsky basin
Вестник Камчатской региональной ассоциации "Учебно-научный центр". Серия: Науки о ЗемлеPaleomagnetic dating of the Bolshesyrsky igneous area, a thick intraplate igneous complex of Khakassia, was carried out. The complex has not been dated due to the peculiarities of the stratigraphy and the lack of suitable rocks for applying the methods ...
D.V. Kovalenko, M.V. Buzina
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
The geological-genetic model of Carlin type gold deposits
Литосфера, 2016 The Carlin type gold deposits (CTGD) presents large metasomatic bodies of jasperoids in carbonate host rocks, that contain finely dispersed submicroscopic gold in disseminated pyrite or marcasite.
A. V. Volkov, A. A. Sidorov
doaj +2 more sources
Recognizing and classifying the naturally fractured reservoirs (NFRs) system for the cretaceous carbonate formation exposed along the Bagnotar-Baragali Section, north Pakistan: Implications from surface fractures, petrography and geochemistry [PDF]
, 2022 Muhammad Yaseen +3 more
openalex +1 more source
Acta Crystallographica Section A, Volume 82, Issue 3, Page 145-162, May 2026.General formulas are presented that allow for the enumeration of polytypes based on translationally equivalent layers and two equivalent arrangements of adjacent layers involving distinct possible stacking vectors, t1 and t2. The results have been applied to the polytypism among two different polysomes of the family of so‐called silico‐ferrites of ...
Michael Francesco Salzmann +3 more
wiley +1 more source
Journal of Metamorphic Geology, Volume 44, Issue 4, Page 265-286, May 2026.ABSTRACT The Quetico subprovince of the Superior Province is among the largest metasedimentary belts globally and provides evidence of tectonic processes at play during the final stages of Archean cratonization. Although previous studies have shown that deformation and metamorphism of the 2.7‐Ga turbiditic protolith resulted in regional subvertical ...
Adrian G. Rehm +4 more
wiley +1 more source
Journal of Metamorphic Geology, Volume 44, Issue 4, Page 311-336, May 2026.ABSTRACT This study investigates garnet–clinopyroxene double‐layered coronae in a metagabbronorite from the high‐grade metamorphic Gföhl Unit (Bohemian Massif). The coronae formed at the interfaces between relic magmatic orthopyroxene, still preserved in the cores of the coronae, and the plagioclase‐rich rock matrix.
Rene Asenbaum +5 more
wiley +1 more source
Geologists of Russian origin in Latin America [PDF]
, 2018 Se describe la vida y trayectoria de geólogos que más allá de su nacionalidad (rusa, ucraniana, tártara, alemana, etc.), nacieron en territorios que pertenecieron al Imperio Ruso, la Unión Soviética o la Federación Rusa, y de sus descendientes graduados ...
Alonso, Ricardo +7 more
core +1 more source
Russian Journal of Earth SciencesThe article presents the results of a comprehensive analysis of fault tectonics in the north-western part of the Verkhoyan-Kolyma orogenic region. The studies were performed on a regional scale. Based on a digital relief model, lineaments were identified
Minaev Vasilii +6 more
doaj +1 more source