Results 21 to 30 of about 682 (137)

Thermobar: An open-source Python3 tool for thermobarometry and hygrometry

Volcanica, 2022
We present Thermobar, a new open-source Python3 package for calculating pressures, temperatures, and melt compositions from mineral and mineral-melt equilibrium.
Penny Wieser, Maurizio Petrelli, Jordan Lubbers, Eric Wieser, Sinan Ozaydin, Adam Kent, Christy Till   +6 more
doaj   +1 more source

Application of clinopyroxene as a petrogenic mineral in determining the nature of Ordovician intrusive rocks in Ziarat (Southern Gorgan, Golestan Province)

Journal of Economic Geology, 2021
Introduction The study area is located in the Eastern Alborz zone (Gansser, 1951) which is a part of the northern margin of Gondwana during the Paleozoic (Stöcklin, 1974; Salehi Rad, 1979; Berberian and King, 1981; Şengor, 1990; Alavi, 1991, 1996 ...
Qassem Azizzadeh, Seyed Jamal Sheikhzakariaee, Mostafa Raghimi , Aziz Rahimi Chakdel   +3 more
doaj   +1 more source

Mineral chemistry of clinopyroxene and feldspars in the Neoproterozoic alkaline dykes of the Bangalore District, Karnataka, India [PDF]

Bulletin of the Geological Society of Finland, 1993
The unmetamorphosed Neoproterozoic dykes of the continental intraplate alkaline magmatism studied in Southern Karnataka consist of analcime-tinguaites, tinguaites, bostonites and solvsbergites.
H.T. Makkonen, K. Laajoki, T.C. Devaraju
doaj   +1 more source

Surface textures of detrital pyroxenes in coastal dune sands (western Gulf of Mexico, Mexico): Implications for their preservation and geoenvironmental processes

The Depositional Record, 2023
This work investigates how the surface textures and morphology of pyroxene grains evolve during their source‐to‐sink history. This study applies to detrital clinopyroxenes concentrated in coastal dune sands of the Gulf of Mexico which were sourced in the
Juan J. Kasper‐Zubillaga, Raymundo Gerardo Martínez‐Serrano, David M. Buchs, Mauricio Mendieta‐Lora, Elsa Arellano‐Torres, León Felipe Álvarez‐Sánchez   +5 more
doaj   +1 more source

MINERAL COMPOSITION AND PT PARAMETERS OF CRYSTALLIZATION OF MANTLE ROCKS UNDER KIMBERLITE FIELDS OF THE ANABAR REGION

Геодинамика и тектонофизика, 2022
The composition of barophilic minerals from mantle xenoliths and Cpx from concentrates of the Kuranakh, Luchakan, Dyuken, and Ary-Mastakh fields of the Anabar region has been studied.
S. I. Kostrovitsky, T. V. Kalashnikova, I. V. Ashchepkov   +2 more
doaj   +1 more source

BONINITES AS A CRITERION FOR THE GEODYNAMIC DEVELOPMENT OF MAGMATIC SYSTEMS IN PALEOSUBDUCTION ZONES IN GORNY ALTAI

Геодинамика и тектонофизика, 2018
Ancient primary boninitic melts of the Gorny Altai (65–105 km, 1410–1590 °C) were studied from the composition of melt inclusions in clinopyroxenes.
A. V. Kotlyarov, V. A. Simonov, I. Yu. Safonova   +2 more
doaj   +1 more source

The Late- Cretaceous volcanic rocks from Talesh area (western Alborz): chemical variation, crystallization condition, hygrometry and tectonic setting [PDF]

پترولوژی, 2020
In the Talesh area (western Alborz), a thick sedimentary- volcanic association formed in a littoral- deltaic environment during the Late Cretaceous. The extrusives comprise volcanoclastics (tuffs), lava flows (pillow and massive) and basic dykes.
Khadijeh Amani, morteza delavari, Sadraldin Amini, Amir Ali Tabbakh Shabani   +3 more
doaj   +1 more source

Creep of dry clinopyroxene aggregates [PDF]

Journal of Geophysical Research: Solid Earth, 2001
We have determined diffusional and dislocation creep rheologies for clinopyroxenite Ca1.0Mg0.8Fe0.2Si2O6 under dry conditions by deforming natural and hot‐pressed samples at confining pressures of 300–430 MPa and temperatures of 1100°–1250°C with the oxygen fugacity buffered by either nickel‐nickel oxide or iron‐wüstite powders.
Misha Bystricky, Stephen Mackwell
openaire   +1 more source

A micro-analytical approach to partition coefficients in plagioclase and clinopyroxene of basaltic sills in Serra Geral Formation, Paraná Basin, Brazil

Brazilian Journal of Geology
: In the present study, detailed micro-analytical data (major and trace elements) in minerals from sills of Serra Geral Formation represents the first attempt to evaluate the partition coefficient of Sc, Ti, V, Cr, Co, Ni, Cu, Zn, Rb, Sr, Y, Zr, Nb, Mo ...
Leonardo Cardoso Renner, Léo Afraneo Hartmann, Wilson Wildner, Hans-Joachim Massonne, Thomas Theye   +4 more
doaj   +1 more source

The Role of Clinopyroxene on the Rheology of Dry Olivine–Clinopyroxene Aggregates

Minerals
To investigate the influence of a second-phase mineral on the rheology of mantle peridotite, we conducted high-temperature deformation experiments on dry olivine–clinopyroxene (Ol-Cpx) aggregates. Cylindrical samples were manufactured using hot-isostatic pressing techniques, with Ol as the matrix phase and Cpx added at volume fractions of fCpx = 0.1, 0.
Xiaodong Zheng, Zhexuan Jiang, Jianfeng Li, Maoshuang Song   +3 more
openaire   +1 more source