Results 31 to 40 of about 11,333 (211)

Geochemical behavior of chromium in minerals of high-Mg rocks, associated with granitoid massifs of the Urals

Литосфера, 2019
Research subject. High-magnesium rocks associated with the granitoid massifs of the Urals are represented by gabbro-diorites and their melanocratic varieties (hornblendites), as well as by diorites and quartz diorites.
S. V. Pribavkin, G. A. Кallistov, Т. A. Оsipova, I. A. Gottman, E. A. Zin’kova   +4 more
doaj   +1 more source

Geochemical constraints on the Hadean environment from mineral fingerprints of prokaryotes [PDF]

, 2017
The environmental conditions on the Earth before 4 billion years ago are highly uncertain, largely because of the lack of a substantial rock record from this period.
Abrevaya, Ximena Celeste, Chaffin, Michael S., Conti, Maria Josiane, Navarro, Margareth Sugano, Novoselov, Alexey A., Schneider, Jerusa, Serrano, Paloma, Silva, Dailto, Souza Filho, Carlos Roberto de   +8 more
core   +1 more source

Element Fractionation and Correction Method for U-Pb Dating of Titanite by Laser Ablation-Inductively Coupled Plasms-Mass Spectrometry

Yankuang ceshi, 2020
BACKGROUND Isotope geochronology is a basic subject to explore the temporal and special evolution of geological bodies and geodynamics. The U-Pb dating technology of accessory minerals is the most widely used in isotope geochronology.
JIN Meng-qi, LI Yan-guang, WANG Peng, WANG Shuang-shuang, LI Wei-liang   +4 more
doaj   +1 more source

Simultaneous Magmatic and Hydrothermal Regimes in Alta–Little Cottonwood Stocks, Utah, USA, Recorded Using Multiphase U-Pb Petrochronology

Geosciences, 2020
Magmatic and hydrothermal systems are intimately linked, significantly overlapping through time but persisting in different parts of a system. New preliminary U-Pb and trace element petrochronology from zircon and titanite demonstrate the protracted and ...
Michael A. Stearns, John M. Bartley, John R. Bowman, Clayton W. Forster, Carl J. Beno, Daniel D. Riddle, Samuel J. Callis, Nicholas D. Udy   +7 more
doaj   +1 more source

Metamorphic Evolution of Garnet-bearing Epidote-Barroisite Schist From the Meratus Complex in South Kalimantan, Indonesia [PDF]

, 2015
DOI:10.17014/ijog.2.3.139-156This paper presents metamorphic evolution of metamorphic rocks from the Meratus Complex in South Kalimantan, Indonesia.
Adachi, T. (Tatsuro), Asy’ari, A. (Amril), Nakano, N. (Nobuhiko), Osanai, Y. (Yasuhito), Setiawan, N. I. (Nugroho)   +4 more
core   +2 more sources

Contribution of remote sensing techniques to the recognition of titanite occurrences at Gabal El-Degheimi area, Central Eastern Desert, Egypt

Egyptian Journal of Remote Sensing and Space Sciences, 2017
The present study aims at delimiting the titanite occurrences in the volcaniclastic metasediments and accessing the mineral chemistry of the titanite at Gabal El-Degheimi area.
Ahmed E. Khalil, Hatem M. El-Desoky, S.M. Salem   +2 more
doaj   +1 more source

Geochronology of the Arkanas Alkaline Province, Southeastern United States [PDF]

, 2009
The Arkansas alkaline province (AAP) consists of intrusive bodies ranging in lithology from carbonatite and lamproite through nepheline syenite. Apatite and titanite fission-track ages fall into two groups-101-94 Ma and ∼88 Ma.
Eby, G. Nelson, Vasconcelos, Paulo
core   +1 more source

Local Phenomena in meta-mict Titanite

Acta Physica Polonica A, 2010
Pure titanite is a mineral with chemical composition CaTiSiO5. Its structure consists of corner linked TiO6-octahedra, SiO4-tetrahedra and sevenfold coordinated Ca positions. In nature various impurities like U and Th can be incorporated in the structure showing alpha and beta radiation.
Bismayer, U., Paulmann, C., Groat, L., Zhang, M.   +3 more
openaire   +2 more sources

Unusual silicate mineralization in fumarolic sublimates of the Tolbachik volcano, Kamchatka, Russia – Part 1: Neso-, cyclo-, ino- and phyllosilicates [PDF]

European Journal of Mineralogy, 2020
This is the initial paper in a pair of articles devoted to silicate minerals from fumaroles of the Tolbachik volcano (Kamchatka, Russia). These papers contain the first systematic data on silicate mineralization of fumarolic genesis.
N. V. Shchipalkina, I. V. Pekov, N. N. Koshlyakova, S. N. Britvin, S. N. Britvin, N. V. Zubkova, D. A. Varlamov, E. G. Sidorov   +7 more
doaj   +1 more source

Evolution of Siderian juvenile crust to Rhyacian high Ba-Sr magmatism in the Mineiro Belt, southern São Francisco Craton [PDF]

, 2018
Plutonic rocks from the Mineiro Belt, Brazil record a delayed onset of the transition from TTG to sanukitoid-type magmatism (high Ba-Sr), starting during the Siderian magmatic lull when little juvenile magma was added to the continental crust.
Fowler, Mike, Lana, Cristiano, Lasalle, Stephanie, Moreira, Hugo, Seixas, Luís, Stevenson, Ross, Storey, Craig   +6 more
core   +2 more sources