Results 141 to 150 of about 50,106 (261)

Augite-Biotite-Diorite [PDF]

Geological Magazine, 1937
openaire   +3 more sources

Near‐Synchronous Cambrian Evolution of the Transbrasiliano‐Kandi‐4°50′ Shear Zone in South America and Africa

Terra Nova, Volume 38, Issue 2, Page 97-105, April 2026.
ABSTRACT The Transbrasiliano‐Kandi‐4°50′ (TK4) shear zone in western Gondwana crosscuts South America and NW Africa for at least 6000 km. Despite its impressive size, the timing of the main episode of dextral ductile shearing is uncertain. We present detailed in situ multi‐mineral geochronology of mylonites from both Brazil and Algeria supporting that ...
F. A. Caxito, B. V. Ribeiro, F. Alkmim, A. Deramchi, C. L. Kirkland   +4 more
wiley   +1 more source

Dating C/S Structures in Syntectonic Granites by In Situ Rb‐Sr Analyses on Muscovite

Terra Nova, Volume 38, Issue 2, Page 124-129, April 2026.
ABSTRACT The interplay of crystallisation, deformation and fluid–rock interactions makes deciphering geochronological information complex in syntectonic granites. In this study, we apply in situ Rb‐Sr analyses to selected samples from the Questembert Variscan syntectonic granite in Western France, which was emplaced along the South Armorican Shear Zone
Philippe Boulvais, Romain Tartèse
wiley   +1 more source

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

Subcritical Cracking Associated With Subgrain Rotation Recrystallisation in Quartz Inferred From Cathodoluminescence Study

Terra Nova, Volume 38, Issue 2, Page 141-147, April 2026.
ABSTRACT We employed cathodoluminescence (CL) to study deformed quartz phenocrysts from the Cretaceous granite porphyry in SW Japan and observed fracture‐like planar structures appearing as CL‐dark bands. These CL‐dark bands were aligned with low‐angle grain boundaries formed by subgrain rotation recrystallisation.
Takuro Yoshioka, Takamoto Okudaira, Hideo Takagi   +2 more
wiley   +1 more source

Early Archean tonalite gneiss in the upper peninsula of Michigan [PDF]

Geochronological results on tonalite gneiss of northern Michigan that is 3.56 Ga or slightly older is presented. Tonalitic augen gneiss and structurally overlying biotite gneiss and schist are exposed in a dome near Watersmeet.
Peterman, Z. E., Sims, P. K., Zartman, R. E.   +2 more
core   +1 more source

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

Silicate minerals enhance the expression of genes related to mineral dissolution by <i>Priestia aryabhattai</i> strain C4-10. [PDF]

Appl Environ Microbiol
Sheng Q, Zheng X-Y, Yang S-H, Dong W, He L-Y, Sheng X-F.   +5 more
europepmc   +1 more source

Waste Powder Biotite as a Factor Enhancing the Flexural Strength of RPC. [PDF]

Materials (Basel)
Grzeszczyk S, Rajczyk T, Matuszek-Chmurowska A, Jurowski K, Kaleta-Jurowska A.   +4 more
europepmc   +1 more source

Remote sensing and geochemical constraints on polymetallic mineralization in Abu Rusheid and Sikait granites of Egypt. [PDF]

Sci Rep
Abo Khashaba SM, El-Shibiny NH, Hassan SM, Drüppel K, Azer MK.   +4 more
europepmc   +1 more source