scholarly journals Re-Os and Ar-Ar isotope measurements of inclusions in diamonds from the Ural Mountains: constraints on diamond genesis and eruption ages

2019 ◽  
Keyword(s):  
Ural Mountains ◽  
Diamond Genesis ◽  
Isotope Measurements

Re–Os and 40Ar/39Ar isotope measurements of inclusions in alluvial diamonds from the Ural Mountains: Constraints on diamond genesis and eruption ages

Lithos ◽  
2009 ◽  
Vol 112 ◽  
pp. 714-723 ◽  
Author(s):  
Fernando Laiginhas ◽  
D. Graham Pearson ◽  
David Phillips ◽  
Ray Burgess ◽  
Jeff W. Harris
Keyword(s):  
Ural Mountains ◽  
Diamond Genesis ◽  
Isotope Measurements

Interesting records of Butterflies (Lepidoptera, Papilionoidea) in the Ural Mountains (Russia)

2018 ◽  
Vol 69 (4) ◽  
pp. 239-242
Author(s):  
Sergey A. Rybalkin ◽  
Valentina O. Zurilina ◽  
Roman V. Yakovlev
Keyword(s):  
New Records ◽  
Ural Mountains

New records of Pieridae and Nymphalidae are given for the Ural Mountains.

LONG-TERM REPRODUCIBILITY OF STANDARDS FOR CLUMPED ISOTOPE MEASUREMENTS

2017 ◽  
Author(s):  
Greg Jesmok ◽  
◽  
Deepshikha Upadhyay ◽  
Nathaniel Davila ◽  
Cassie Clough ◽  
...  
Keyword(s):  
Clumped Isotope ◽  
Isotope Measurements

Hydrothermal Sr contamination of the Dippin sill, Isle of Arran, Western Scotland

1984 ◽  
Vol 48 (348) ◽  
pp. 311-322 ◽  
Author(s):  
A. P. Dickin ◽  
C. M. B. Henderson ◽  
F. G. F. Gibb
Keyword(s):  
Stable Isotope ◽  
Hydrothermal Alteration ◽  
Closed System ◽  
Hydrothermal Systems ◽  
Hydrothermal Fluids ◽  
Drill Core ◽  
Sr Isotope ◽  
Core Section ◽  
High Silica ◽  
Isotope Measurements

Abstract The Dippin sill, which is emplaced into the Triassic sediments of SE Arran, is an alkaline basic sheet which displays pronounced hydrothermal alteration. The 40-m-thick sill has suffered pervasive contamination with radiogenic Sr, introduced from the Triassic sediments by hydrothermal fluids. Stable isotope measurements suggest that fluids were of meteoric origin, but were restricted to a small closed-system circulation. Initial 87Sr/86Sr ratios in the sill were raised from an original value of 0.7032 to a maximum of 0.7091, contamination being especially pronounced near the contacts at Dippin Head itself (localities 12 and 14) and in a drill core section through the sill above Dippin. Hydrothermal Sr was incorporated into an early-formed high-CaO, high-Sr analcime, which replaced unstable high-silica nepheline in interstitial patches. However, this high-CaO analcime, along with plagioclase, was later replaced by a low-CaO, low-Sr analcime, allowing Sr leaching from the margins of the sill. Hydrothermal fluids are thought to have migrated up to 1 km laterally, up the dip of the sill, mainly via tension joints forming in the cooling intrusion. Pooling of hot fluids at the upper end of the sill probably raised water/rock ratios in this region and allowed greater Sr contamination during mineralogical alteration. The undersaturated mineralogy of the sill accounts for its pervasive hydrothermal Sr contamination, which contrasts markedly with the relatively undisturbed Sr isotope compositions of Hebridean granites involved in hydrothermal systems.

Using stable hydrogen and oxygen isotope measurements of feathers to infer geographical origins of migrating European birds

Oecologia ◽  
2004 ◽  
Vol 141 (3) ◽  
pp. 477-488 ◽  
Author(s):  
Keith A. Hobson ◽  
Gabriel J. Bowen ◽  
Leonard I. Wassenaar ◽  
Yves Ferrand ◽  
Hervé Lormee
Keyword(s):  
Oxygen Isotope ◽  
Hydrogen And Oxygen Isotope ◽  
Isotope Measurements

In situ boron isotope measurements of natural geological materials by LA-MC-ICP-MS

2010 ◽  
Vol 55 (29) ◽  
pp. 3305-3311 ◽  
Author(s):  
KeJun Hou ◽  
YanHe Li ◽  
YingKai Xiao ◽  
Feng Liu ◽  
YouRong Tian
Keyword(s):  
Boron Isotope ◽  
Geological Materials ◽  
Icp Ms ◽  
Isotope Measurements
Sign in / Sign up

Export Citation Format

Share Document