Results 61 to 70 of about 3,800 (187)

Direct dating of mid-crustal shear zones with synkinematic allanite:new in situ U-Th-Pb geochronological approaches applied to the Mont Blanc massif [PDF]

open access: yes, 2013
International audienceDating the timing of motion on crustal shear zones is of tremendous importance for understanding the assembly of orogenic terranes.
Cenki-tok, Benedicte   +4 more
core   +3 more sources

Tracing the Origin of Oxide Inclusions in Vacuum Arc Remelted Steel Ingots Using Trace Element Profiles and Strontium Isotope Ratios

open access: yesMetals
Non-metallic inclusions (NMIs) in steel have a detrimental effect on the processing, mechanical properties, and corrosion resistance of the finished product.
Christoph Walkner   +7 more
doaj   +1 more source

Boron isotope calibration of large benthic foraminifera species using LA-MC-ICP-MS [PDF]

open access: yesGoldschmidt2021 abstracts, 2021
Douglas Coenen   +6 more
openaire   +1 more source

U-Pb Geochronology, Sr–Nd Geochemistry, Petrogenesis and Tectonic Setting of Gandab Volcanic Rocks, Northeast Iran [PDF]

open access: yes, 2017
This paper addresses U-Pb geochronology, Sr-Nd geochemistry, petrogenesis and tectonic setting in the Gandab volcanic rocks. The Gandab volcanic rocks belong to the Sabzevar zone magmatic arc (northeastern Iran).
Entezari Harsini, A.   +3 more
core   +1 more source

Methodological aspects of U/Pb dating of zircons using multicollector mass spectrometer with inductively coupled plasma NEPTUNE PLUS with NWR 213 attachment for laser ablation [PDF]

open access: yes, 2016
Представлена методика анализа изотопного состава Pb и U в цирконах и процедура обработки данных, реализованные на масс-спектрометре с индуктивно-связанной плазмой Neptune Plus (фирма Thermo Scientific), оборудованном одним центральным неподвижным ...
Pupyshev, A. A.   +7 more
core   +1 more source

Chronology, Geochemistry and Geological Significance of Epo Granite Intrusion, Southern Jiangxi

open access: yesYankuang ceshi, 2014
The Epo intrusion with an exposed area of 200 km2, is mainly composed of biotite monzonitic granite, and is located on the western margin of the Yudu-Qingtang basin, the conjunction of E-W trending Nanling tectonic-magmatic belt and the NNE trending ...
GUO Na-xin   +5 more
doaj   +2 more sources

U–Pb dating and Sm–Nd isotopic analysis of granitic rocks from the Tiris Complex : new constaints on key events in the evolution of the Reguibat Shield, Mauritania [PDF]

open access: yes, 2012
The Reguibat Shield of N Mauritania and W Algeria represents the northern exposure of the West African Craton. As with its counterpart in equatorial West Africa, the Leo Shield, it comprises a western Archaean Domain and an eastern Palaeoproterozoic ...
Abdouloye, T.B.   +6 more
core   +1 more source

Constraints on timing of the early-paleoproterozoic magmatism and crustal evolution of the Oulongbuluke microcontinent: U-Pb and Lu-Hf isotope systematics of zircons from Mohe granitic pluton [PDF]

open access: yes, 2007
The Olongbuluke micro-continent is composed of a two-fold basement with cover strata. The lower basement is the medium-to high-grade Delingha complex (DC) and the Dakendaban Group, the upper is the low-grade Wandonggou Group.
Chen, N   +6 more
core  

Ferromanganese nodules and micro-hardgrounds associated with the Cadiz Contourite Channel (NE Atlantic): Palaeoenvironmental records of fluid venting and bottom currents [PDF]

open access: yes, 2012
Ferromanganese nodule fields and hardgrounds have recently been discovered in the Cadiz Contourite Channel in the Gulf of Cadiz (850–1000 m). This channel is part of a large contourite depositional system generated by the Mediterranean Outflow Water ...
Abouchami   +159 more
core   +2 more sources

Zircon U-Pb Dating, Petrology, Geochemistry of the Buya Pluton and Its MMEs in the Southern Margin of Tarim, Xinjiang

open access: yesYankuang ceshi, 2017
Paleozoic acidic intrusive rocks are widespread in the Tiekelike tectonic belt of the southern margin of Tarim. Petrography, whole-rock major and trace elements, and zircon U-Pb dating are reported for the Buya granodiorite and its mafic microgranular ...
HU Xue-yuan   +6 more
doaj   +1 more source

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