Territory Stories

Summary of results. Joint NTGS-GA geochronology project: Arunta and Pine Creek regions, July 2006 - May 2007

Details:

Title

Summary of results. Joint NTGS-GA geochronology project: Arunta and Pine Creek regions, July 2006 - May 2007

Creator

Carson, CJ; Claou -Long, JC; Stern, R; Close, DF; Scrimgeour, IR; Glass, LM; Carson, CJ; Claou -Long, JC; Stern, R; Close, DF; Scrimgeour, IR; Glass, LM

Issued by

Northern Territory Geological Survey; Northern Territory Geological Survey

Collection

E-Publications; E-Books; PublicationNT; NTGS Record

Date

2009; 2009

Location

Arunta Region; Aileron Province; Pine Creek Orogen

Notes

Made available via the Publications (Legal Deposit) Act 2004 (NT); Available from GEMIS - Geoscience Exploration and Mining Information System; Made available via the Publications (Legal Deposit) Act 2004 (NT)

Language

English

Subject

Geochronology; Arunta Region; Aileron Province; Pine Creek Orogen

Publisher name

Northern Territory Government; Northern Territory Government

Place of publication

Darwin

Series

NTGS Record

Volume

2009-001

File type

application/pdf

ISBN

9780724571765; 9780724571765

ISSN

1443-1149; 1443-1149

Use

Attribution International 4.0 (CC BY 4.0); Creative Commons Attribution 4.0 International (CC BY 4.0). Please observe and retain any copyright or related notices that accompany this material and give attribution to: Northern Territory of Australia (Northern Territory Geological Survey) and the Commonwealth of Australia (Geoscience Australia).

Copyright owner

Northern Territory Government; Northern Territory Government

License

https://creativecommons.org/licenses/by/4.0/; https://creativecommons.org/licenses/by/4.0/

Related links

https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82449 [GEMIS]; https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82449

Parent handle

https://hdl.handle.net/10070/794214; https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/82449

Citation address

https://hdl.handle.net/10070/794227

Page content

7 metamorphic rims). Clearly, further study would be required in order to better constrain this conclusion. AlbartaMetamorphics Sample information GAsampleID: 1926343 NTGSsampleID:IC06CJC03 1:250000mapsheet: ILLOGWA CREEK (SF 535) 1:100000mapsheet: QuaRtz (5951) Region: Aileron Province (Arunta Region) Gridreference: 518113mE 7404971mN Formalname: Albarta Metamorphics Lithology: biotite-garnet metapsammite Rock description, notes Sample 926343 was collected from the eastern Albarta Metamorphics, a region dominated by highgrade metasedimentary units. Exposure, in general, is fair to good, with rolling lowlevel hills dissected by steep narrow dry creek channels. The sampled unit is a migmatitic quartzo feldspathic biotitegarnet metapsammite (Figure21) locally interbedded with minor garnetcordierite metapelite (sample 926344). The sampled unit is intensely deformed; rootless isoclinal folding and fold axisparallel shearing with truncated and transposed fold limbs are common. Dismembered and attenuated quartzofeldspathic leucosomes are common. In thin section, the unit comprises a fine-grained (1 mm diameter), equigranular interlocking groundmass dominated by quartz (ca 5060 modal%), subhedral plagioclase (ca 5%) and Kfeldspar (5 0%) with scattered foxybrown biotite (0%). Quartz has irregular serrated grain boundaries and undulose extinction. Biotite defines a well developed fabric. Some green biotite is also present. Garnet is a minor phase and occurs as irregular anhedral grains (50%), associated with clusters of unaligned biotite. Minor secondary muscovite is present (50%). 400 600 800 1000 1200 1400 1600 0.05 0.07 0.09 0.11 2 4 6 8 10 12 14 16 238U/206Pb 20 7 P b/ 20 6 P b 'Larapinta event' lower intercept = 466 28 Ma data-point error ellipses are 2 Granodiorite western Albarta Metamorphics Aileron Province ILLOGWA CREEK GA 1926338 NTGS IC05BDG127a Low Th/U (0.05) metamorphic overgrowth; analysis D.38 A 09 -0 28 .a i 1800 Figure 20. Expanded TeraWasserburg concordia diagram showing all isotopic data from granodiorite, western Albarta Metamorphics (GA 926338; NTGS HA05BDG27a). Physical location of SHRIMP spot D.38 is indicated in inset. Light blue ellipses are analyses shown in Figure19. Figure21.Highgrade biotitegarnet metapsammite (GA 926343; NTGS IC06CJC03), eastern Albarta Metamorphics, facing northeast. Photograph shows sample location for SHRIMP analysis. Sledgehammer for scale.


Aboriginal and Torres Strait Islander people are advised that this website may contain the names, voices and images of people who have died, as well as other culturally sensitive content. Please be aware that some collection items may use outdated phrases or words which reflect the attitude of the creator at the time, and are now considered offensive.

We use temporary cookies on this site to provide functionality.
By continuing to use this site without changing your settings, you consent to our use of cookies.