Morphology and Raman spectral parameters of Bohemian microdiamonds: implications to elastic geothermobarometry

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F22%3A00000076" target="_blank" >RIV/00025798:_____/22:00000076 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216224:14310/22:00128446

Výsledek na webu

<a href="http://www.jgeosci.org/detail/jgeosci.356" target="_blank" >http://www.jgeosci.org/detail/jgeosci.356</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3190/jgeosci.356" target="_blank" >10.3190/jgeosci.356</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Morphology and Raman spectral parameters of Bohemian microdiamonds: implications to elastic geothermobarometry

Popis výsledku v původním jazyce

This work combines morphology and internal structure of northwestern Bohemian microdiamonds with their Raman spectral parameters. Single diamond octahedra enclosed in kyanite in the acidic gneiss show predominantly Raman shift towards higher wave numbers. By contrast, single and polycrysalline diamonds enclosed in garnet and zircon yield more variable data including the Raman shift towards lower wavenumbers ('downshift'. This is consistent with the character of the diamond-host boundary (closed vs. open), and more complex internal structure and presence of other phases in the latter. The entrapment pressure (Ptrap) for diamonds in garnet was calculated using elastic geobarometry. The “downshifted” diamonds exhibit entrapment pressures of 4.8±0.14 and 4.99±0.14 GPa at an entrapment temperature of 1100 °C, using unstrained reference diamond from the literature and own measurements, respectively. These pressures are consistent with the estimates using conventional geobarometry and elastic theory.

Název v anglickém jazyce

Morphology and Raman spectral parameters of Bohemian microdiamonds: implications to elastic geothermobarometry

Popis výsledku anglicky

This work combines morphology and internal structure of northwestern Bohemian microdiamonds with their Raman spectral parameters. Single diamond octahedra enclosed in kyanite in the acidic gneiss show predominantly Raman shift towards higher wave numbers. By contrast, single and polycrysalline diamonds enclosed in garnet and zircon yield more variable data including the Raman shift towards lower wavenumbers ('downshift'. This is consistent with the character of the diamond-host boundary (closed vs. open), and more complex internal structure and presence of other phases in the latter. The entrapment pressure (Ptrap) for diamonds in garnet was calculated using elastic geobarometry. The “downshifted” diamonds exhibit entrapment pressures of 4.8±0.14 and 4.99±0.14 GPa at an entrapment temperature of 1100 °C, using unstrained reference diamond from the literature and own measurements, respectively. These pressures are consistent with the estimates using conventional geobarometry and elastic theory.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10504 - Mineralogy

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Geosciences

ISSN

1802-6222

e-ISSN

—

Svazek periodika

67

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

19

Strana od-do

239-357

Kód UT WoS článku

000891320300003

EID výsledku v databázi Scopus

2-s2.0-85142731817