Results 121 to 130 of about 49,779 (247)

Archean metamorphic sequence and surfaces, Kangerdlugssuaq Fjord, East Greenland [PDF]

The characteristics of Archean metamorphic surfaces and fabrics of a mapped sequence of rocks older than about 3000 Ma provide information basic to an understanding of the structural evolution and metamorphic history in Kangerdlugssuaq Fjord, east ...
Kays, M. A.
core   +1 more source

Pegmatites of the Mokromoskovsk granite pluton

Вісник Харківського національного університету імені В.Н. Каразіна. Серія Геологія. Географія. Екологія
Introduction. The Mokromoskovsky pluton is composed of light gray granites and dark gray granodiorites. Light gray granites are composed of oligoclase (35-40%), microcline (20-25%), quartz (30-35%), and biotite (2-5%).
Yuliia Lytvynenko
doaj   +1 more source

Biotite effect on the anisotropic properties of gneiss in Eastern Himalayas, China

Journal of Rock Mechanics and Geotechnical Engineering
Intact rocks with layered microstructures, such as gneiss, exhibit strong anisotropy. Although anisotropy in the macroscopic strength of gneiss has been widely reported, the role of microstructures in tensile mechanics remains largely unclear.
Shijie Liu, Hengxing Lan, Zhao Chen, Langping Li, Han Bao   +4 more
doaj   +1 more source

Local availability and long-range trade: the worked stone assemblage [PDF]

, 2012
Inter disciplinary study of major excavation assemblage from Norse settlement site in Orkney.
Barrett, J., Batey, C., Breckenridge, F., Bunbury, J., Forster, A., Gaunt, G., Jones, R.E.   +6 more
core  

Petrology of the Pan-African high-K alkali-calcic Bocaranga plutonic complex in the Adamawa-Yadé domain (Central African Republic): Nature, origin and contribution to geodynamic reconstruction of the Central African fold belt

Solid Earth Sciences
The Bocaranga plutonic complex belongs to the northwestern extension Adamawa-Yadé Domain of the Central African Fold Belt (CAFB) in the Central African Republic (CAR).
Rodrigue Martial Topien, Jules Tcheumenak Kouémo, José Kpéou, Gaetan Moloto-A-Kenguemba, Maurice Kwékam   +4 more
doaj   +1 more source

Phase Equilibria Modeling of Low-Grade Metamorphic Martian Rocks [PDF]

, 2018
We report on modeling low-grade (up to 300 °C) metamorphic reactions with Martian starting ...
Schwenzer, S. P., Semprich, J, Treiman, A. H.   +2 more
core  

Study of the lithology, petrology and rock chemistry for the Pyramid Mountains, New Mexico [PDF]

Rock and soil samples were collected at 24 sites within the Pyramid Mountains of southwestern New Mexico. The site locations are specified as 10-acre plots within the Section, Township, and Range land survey system. Hand specimen are described.
Grant, S. K.
core   +1 more source

Augite-Biotite-Diorite [PDF]

Geological Magazine, 1937
openaire   +3 more sources

Metamorphism and plutonism in the Quetico Belt, Superior Province, N.W. Ontario [PDF]

The Quetico Belt lies between the metavolcanic Wawa-Shebandowan and Wabigoon Belts. It consists of marginal metasedimentary rocks and central pelitic, gneissic and plutonic rocks.
Percival, J. A.
core   +1 more source

Cl-rich minerals in Archean granulite facies ironstones from the Beartooth Mountains, Montana, USA: Implications for fluids involved in granulite metamorphism [PDF]

The implications of Cl-rich minerals in granulite facies rocks are discussed. Results from ironstones of the Beartooth Mountains, Montana are discussed. It is suggested that CO2-brine immiscibility might be applicable to granulite facies conditions, and ...
Henry, D. J.
core   +1 more source