Results 111 to 120 of about 6,151 (165)

OXYGEN FUGACITY ACROSS TECTONIC SETTINGS

Goldschmidt2022 abstracts, 2020
Experiment and observation have established the centrality of oxygen fugacity (fO2) to determining the course of igneous differentiation, and so the development and application of oxybarometers have proliferated for more than half a century. The compositions of mineral, melt, and vapor phases determine the fO2 that rocks record, and the activity models
Elizabeth Cottrell, Suzanne Birner, Maryjo Brounce, Fred Davis, Laura Waters, Katherine Kelley   +5 more
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Magmatism and tectonic settings

Journal of Geophysical Research, 1972
Mutual relationships of mobile lithospheric plates define two distinct tectonic environments each characterized by diagnostic magmatism. A compressional environment occurs at loci of plate convergence; quartz- and hypersthene-normative intermediate, acid and basic members of the calc-alkaline orogenic suite are emplaced above a dipping seismic zone.
R. F. Martin, A. J. Piwinskii
openaire   +1 more source

Tectonic Setting of the Earthquake

2014
The seismo-tectonic picture of the Lushan earthquake is clear at the scales of lithospheric plate and crustal block, but remains puzzle at the scale of seismogenic faults. Role of such ‘missing earthquakes’ in seismic hazard analysis is a question worth discussing.
Zhongliang Wu, Changsheng Jiang, Xiaojun Li, Guangjun Li, Zhifeng Ding   +4 more
openaire   +1 more source

Tectonic setting of the Gulf of Alaska

Marine Geotechnology, 1981
Abstract The Gulf of Alaska is a seismically active area within which the boundary between the Pacific and North American plates is located. This active boundary has evolved through a series of shifts from north to south as successive blocks of continental crust were moved into southern Alaska. The present plate boundary includes dominantly strike‐slip
P. D. Guptill, G. E. Brogan, T. Turcotte
openaire   +1 more source

Tectonic Setting of Chuan-Dian Region

2010
The NEE-directing motion of the Indian plate and its collision into the Eurasian plate has resulted in the formation of the world roof – the Qinghai-Tibetan Plateau with an elevation of over 4,500 m. The crustal thickness of the plateau reaches up to 60∼70 km, about 20∼30 km thicker than that of the Sichuan basin, where the crustal thickness is only ...
Xing, Huilin, Xu, Xiwei
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North America; Plate-tectonic setting and tectonic elements

1989
Abstract This volume is about the evolution of the North America Plate. It also briefly discusses the evolution of the Pacific Ocean and the Caribbean as they relate to North America. We will briefly sketch the present outlines of the North America Plate, review the plate-tectonic development of North America in a global context, and ...
A. W. Bally, C. R. Scotese, M. I. Ross
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Geological and Tectonic Setting

2011
The present-day geological structure of the Carpatho–Balkan–Dinaric region is controlled by the evolution of the Tethys and Atlantic Oceans and the related movements of the European and the African Plates. The Carpathians, a continuation of the Eastern Alps, formed along the margin of the European Plate to effect the closure of the Neotethys and the ...
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Tectonic Setting of Aleutian Volcanism

2014
The tectonic setting of the Aleutian volcanic arc is relatively straightforward in the context of global plate tectonics theory and, because subaerial exposures are limited to small islands along the central and western parts of the arc, local complexities can be difficult to ferret out.
Zhong Lu, Daniel Dzurisin
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Tectonic settings and magma associations

Bulletin Volcanologique, 1974
The largest volumes of peralkaline silicic rocks are found in areas of epeirogenic uplift and rift formation on the continents, but they may also form in several other tectonic settings, such as the oceanic islands, during the later stages of orogenic cycles, as isolated occurrences in active mobile belts, and in areas of extensional tectonics at or ...
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Distribution and Tectonic Setting of Kimberlites

1980
The general world-wide distribution of kimberlites is shown in Fig. 1 and in greater detail for the main kimberlite provinces in Figs. 2–6. From the aspect of the tectonic setting of kimberlite, Dawson (1970) established that, in the case of the kimberlites of Africa, most kimberlites are confined to the ancient cratons (or areas underlain by the ...
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