Results 71 to 80 of about 7,546 (232)
Petrología del Batolito de Acandí y cuerpos asociados, Unguía-Chocó, Colombia
, 2018 espanolEl Batolito de Acandi es un cuerpo intrusivo con amplias variaciones composicionales (Gonzalez y Londono, 2002) que data del Oligoceno (Restrepo y Toussaint, 1976), a su vez intruido por cuerpos subvolcanicos de andesitas, dacitas, y diques de ...
Diana Sánchez-Celis +3 more
semanticscholar +1 more source
Petrología de Coria(Cáceres) [PDF]
, 1987 Dejando aparte los granitos moscovíticos de grano grueso, los aspectos petrogenéticos más interesantes se plantean en la relación tonaIitasgranito aplítico.
Ruíz García, Casilda
core +1 more source
Rare earth element and yttrium geochemistry applied to the genetic study of cryolite ore at the Pitinga Mine (Amazon, Brazil) [PDF]
, 2008 This work aims at the geochemical study of Pitinga cryolite mineralization through REE and Y analyses in disseminated and massive cryolite ore deposits, as well as in fluorite occurrences.
Andrade, Sandra +5 more
core +3 more sources
Journal of Petroleum Geology, Volume 47, Issue 4, Page 395-430, October 2024.We review published studies characterizing the Thamama‐B reservoir zone in the upper Kharaib Formation (late Barremian) in Abu Dhabi oilfields and at outcrops in Oman. Available data for oxygen and carbon isotope compositions, fluid inclusion measurements, cement abundance and formation water composition are interpreted in terms of a paragenetic model ...
S. N. Ehrenberg +6 more
wiley +1 more source
Morphostructural analysis applied for susceptibility assessment of environmental degradation by linear hydraulic erosions in the countryside of São Paulo State [PDF]
Geologia USP. Série Científica, 2015 The Westside of the State of São Paulo, in Brazil, is known by its strong agricultural vocation and erosion problems. The natural conditions and the occupation dynamic were propitious to the emergence of this kind of environmental degradation in the ...
Márcia Sayuri Morinaga +1 more
doaj +1 more source
Petrología de Garrovillas (Cáceres) [PDF]
, 1984 Los aspectos petrogenéticos de las diferentes unidades graníticas han sido tratadas extensamente por CORRETGE, op-cit. En este apartado nos ocuparemos muy esquemáticamente de la evolución mineralógica de las facies graníticas principales de la Hoja de ...
Ruíz García, Casilda
core +1 more source
Ferruginous conditions: A dominant feature of the ocean through Earth’s history [PDF]
, 2011 The reconstruction of oceanic paleoredox conditions on Earth is essential for investigating links between biospheric oxygenation and major periods of biological innovation and extinction, and for unravelling feedback mechanisms associated with ...
Canfield, Donald Eugene +1 more
core +1 more source
Journal of Metamorphic Geology, Volume 42, Issue 7, Page 979-1033, September 2024.Abstract In the Altai Accretionary Wedge, several periods of Barrovian‐ and Buchan‐type metamorphic cycles were dated from Ordovician to Permian. However, the timing and link between these cycles are not clear, and their causes are debated. In order to contribute to the understanding of Barrovian‐ to Buchan‐type evolution of the accretionary wedges, we
Carmen Aguilar +8 more
wiley +1 more source
O Grupo Canastra em sua área-tipo, região de Tapira, sudoeste do estado de Minas Gerais
Geologia USP. Série Científica, 2012 Este trabalho teve como objetivo apresentar os resultados do mapeamento geológico realizado na região de Tapira, parte Sul da Faixa Brasília. Esta região, que é a área-tipo do Grupo Canastra, mostrou grandes complexidades tectônica e estratigráfica ao ...
Carlos Humberto da Silva +4 more
doaj +1 more source
Petrología de Casar de Cáceres (Cáceres) [PDF]
, 1984 En este apartado se darán algunas características generales de tipo petrogenético que pueden deducirse mediante las observaciones estructurales, mineralógicas y texturales de las rocas. En la Hoja de Casar de Cáceres afloran exclusivamente granitos de la
Ruíz García, Casilda
core +1 more source