Results 71 to 80 of about 1,087 (206)
Comagmatic Evolution of the Boulder and Pioneer Batholiths of Southwest Montana
, 2017 The tectonic region that encompasses Southwestern Montana is a petrologically complex area containing several batholiths and thrust faults, underlined by Precambrian basement rock and capped by sedimentary rocks.
Bankhead, John
core
Brazilian Journal of Geology: Syn-orogenic Neoproterozoic granitic magmatism (ca. 630-600 Ma) in southern Brasília Orogen includes large batholiths of compositionally expanded high-K calc-alkaline granites (lato sensu) and small occurrences constituted by anatetic leuco-granites ...
Andrés Fabián Salazar-Naranjo +1 more
doaj +1 more source
Brazilian Journal of Geology, 2020 Records of large crustal masses in the northwest of Borborema Province (BP) spread over more than 300 km are found as numerous granitic bodies amid a high-grade metamorphic gneissic-migmatitic terrain.
Paulo Sergio de Sousa Gorayeb +2 more
doaj +1 more source
Geology of the central uplift of the Kamestastin Lake impact structure, Labrador, Canada
Meteoritics &Planetary Science, EarlyView.Abstract The ~28 km Kamestastin (Mistastin) Lake impact structure is a relatively well‐preserved and well‐exposed complex impact structure. The central uplift of this structure is accessible as two islands in the middle of Kamestastin Lake. We present an updated, detailed geological map and description of Horseshoe and Bullseye islands that provides ...
A. C. Singleton, G. R. Osinski
wiley +1 more source
From crucible through subduction to batholiths
, 1977 There are many lines of evidence to be evaluated in considering the identity and origin of primary magmas; conclusions reached cannot be valid unless they satisfy the constraints imposed by phase equilibrium experiments.
Wyllie, P. J.
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Sedimentology, EarlyView.ABSTRACT The Paleoarchean Antarctic Creek Member of the Mount Ada Basalt, Eastern Pilbara Terrane, Western Australia, includes beds of jasper and white chert composed of sand‐sized silica granules that often contain or are mixed with silt‐sized particles of haematite.
Donald R. Lowe, Gary R. Byerly
wiley +1 more source
Геодинамика и тектонофизика, 2019 Eastern part of the Central Taimyr belt is composed of Precambrian rocks penetrated by granites of the Snezhnaya complex (845–825 million years) and later overlain by mid‐Neoproterozoic sin‐ postorogenic sedimentary deposits of the Stanovaya‐Kolosova ...
A. B. Kuzmichev +5 more
doaj +1 more source
Ductile Extrusion Triggered by Continental Collision in NE Brazil
Terra Nova, EarlyView.ABSTRACT The Borborema Province in northeastern Brazil hosts one of the world's largest strike‐slip shear zone networks, active during the late Neoproterozoic assembly of West Gondwana. Whether these shear zones initiated during active continental collision or as a post‐orogenic response to far‐field stresses remains debated.
L. R. Tesser +6 more
wiley +1 more source
, 2010 The authors report new U-Pb zircon SHRIMP ages for the Ladakh and Karakoram batholiths. The samples of the Ladakh Batholith were collected from the Khardung La and Chang La tops and those of the Karakoram Batholith were collected along the Tangtse gorge ...
core
Early Permian to Late Triassic batholiths of the Chilean Frontal Cordillera (28°–31°S): SHRIMP U–Pb zircon ages and Lu–Hf and O isotope systematics [PDF]
, 2014 Artículo de publicación ISIOne of the major geological units of the Main Andean Range (Frontal Cordillera) of north–central Chile is a group of composite and heterochronous late Paleozoic–early Mesozoic batholiths that extends for 500 km roughly NS ...
Mpodozis Marín, Constantino +5 more
core +1 more source