Territory Stories

Renison Goldfields Consolidated Limited, Pine Creek Project. Groundwater Investigation Stage 2, Establishment of Borefield and Management Studies. Report H114/3-AA.

Details:

Title

Renison Goldfields Consolidated Limited, Pine Creek Project. Groundwater Investigation Stage 2, Establishment of Borefield and Management Studies. Report H114/3-AA.

Creator

Coffey & Partners Pty Ltd

Collection

E-Publications; E-Books; PublicationNT; Report no. 87/1984

Date

1983-11-01

Notes

Date:1983-11

Language

English

Publisher name

Northern Territory Government

Place of publication

Darwin

Series

Report no. 87/1984

File type

application/pdf

Use

Attribution International 4.0 (CC BY 4.0)

Copyright owner

Northern Territory Government

License

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

Parent handle

https://hdl.handle.net/10070/228435

Citation address

https://hdl.handle.net/10070/674167

Page content

Technical Report WRD84087 Viewed at 14:07:14 on 29/07/2010 Page 103 of 167. il .. il i . , I I I I l , I I I I , I I I I I ~ ~ I l I L ~ So'li " 5 . (a) anomaly extent: drilling by the N.T. Department of Transport and Works has indicated higher groundwater potential for broad anomalies, in which greater data confidence can also be placed. (b) anomaly magnitude : indicating greater lateral variations in the geoelectric section. (c) relationship between profiles for n=1 and n=2 anomalies more pronounced in the n=2 data imply a deeper source. Type I anomalies combine favourable aspects of the above criteria (e.g. broad anomalies of large magnitude, more pronounced for n=2) and represent primary targets for follow up investigation. Type II anomalies probably represent less favourable, secondary targets. The anomaly locations and inferred types are summarised in Table 2, and a more detailed description of results for each area follows. 3.1.' Area 1 ~rparent resistivities range from a low on traverse 4 of 90 ohm-metres (Am), to several values in excE''''S of 700.llm. For nortllern traverses (3-6) apparent resistivities average 350J1.m, and to the south this level decreases to approximately 200.Jlm (Travers" 1). Higher average resistivities to the north imply either an increase in the bedrock resistivity or layer 2 resistivity, or more probably, a decrease in the thickness of g~oelectric layer 2. The northern traverses also exllibit a more "noisy" character, due to the crossing of ridges of outcropping bedrocJ, . In this area, two sets of data were acquired only for part of Traverse 4 and for Traverse 6. Generally, the n=1 profiles are similar to the n=2 profiles though lower in overall resistivity due to the lessened influence of the highly res; st i ve bedrock layer. However, 'rom 1050mW to 1300mW on Traverse 4, a strong anomaly is indicated with n=2 values lower than n=1 values. Low resistivities are also indicated .,