Till sidans topp

Sidansvarig: Webbredaktion
Sidan uppdaterades: 2012-09-11 15:12

Tipsa en vän
Utskriftsversion

Nano-powder tablets of mi… - Göteborgs universitet Till startsida
Webbkarta
Till innehåll Läs mer om hur kakor används på gu.se

Nano-powder tablets of mineral standards as matrix-matched reference materials for Rb-Sr dating

Paper i proceeding
Författare Andreas KO Karlsson
Thomas Zack
Dieter Garbe-Schönberg
Oliver Nebel
Publicerad i Bull. Geol. Soc. Finland
Volym Special volume (Abstracts to the 32nd NGWM)
Sidor 212
ISSN 0367-5211
Publiceringsår 2016
Publicerad vid Institutionen för geovetenskaper
Sidor 212
Språk en
Länkar www.geologinenseura.fi/winter_meeti...
Ämnesord Rb-Sr dating, LA-ICP-MS, mineral standards
Ämneskategorier Mineralvetenskap, Geokemi

Sammanfattning

Currently there is no established homogeneous matrix-matched reference material for Rb-Sr dating. As of now the K-feldspar NBS SRM607 is the only mineral-based material used as a standard for isotopic determinations of Rb/Sr ratios and Sr isotopes. However Nebel & Mezger (2006) demonstrated that the NBS SRM607 standard is heterogeneous with respect to Rb/Sr ratios. To circumvent this problem they proposed to plot Rb/Sr ratios and Sr isotopes on an Rb-Sr model isochron. As an alternative approach to overcome inherent heterogeneities of mineral standards, we are using the method described by Garbe-Schönberg & Müller (2014) to produce several nano-powder tablets of several widely available mineral standards. Compared to NBS SRM607 the Mica-Fe and Mica-Mg reference materials are available from various suppliers for more affordable prices. The Rb/Sr ratio and Sr isotopic composition of Mica-Fe and Mica-Mg have previously been determined by Govindaraju (1979), however we will re-analyse these as nano-powders by MC-ICP-MS with the method described in Nebel & Mezger (2006). One long-term motivation is recent advancements in LA-ICP-MS/MS enabling in situ Rb-Sr dating by reaction cell online chemical separation as outlined by Zack (2015, this conference). The nano-powder tablets we will produce have the advantage of being well suited for this novel technique.

Sidansvarig: Webbredaktion|Sidan uppdaterades: 2012-09-11
Dela:

På Göteborgs universitet använder vi kakor (cookies) för att webbplatsen ska fungera på ett bra sätt för dig. Genom att surfa vidare godkänner du att vi använder kakor.  Vad är kakor?