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Drilling completion report, newhaven excision. Dlh-695



Drilling completion report, newhaven excision. Dlh-695


Ellis, D.


E-Publications; E-Books; PublicationNT; Report ; 29/1989




Made available via the Publications (Legal Deposit) Act 2004 (NT).





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Power and Water Authority

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Alice Springs


Report ; 29/1989

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Technical Report WRD89029 Viewed at 15:07:01 on 29/07/2010 Page 5 of 16. I I I I I I I I I I I I I I I I I I I I HYDROGEOLOGY Detailed geological a!).d hydrogeological evaluations of the Newhaven station area are given in Warne's 1988 Newhaven Excision Completion Report and Wells 1983. For the purpose of this report consideration is given to the specLfic area of interest only. The area of interest is near the southern central boundary of the regionally extensive Ngalia Basin. The topography of the area is dominated by the northern siddley Range which trends north west, south east and consists mainly of outcrop of vaughan Springs Quartzite. The.Vaughan Springs Quartzite is faulted against older metamorphic patmungala Beds on the south west. The contact between the Vaughan Springs Quartzi te and the patmungala Beds marks the southern limit of the Ngalia Basin. The Quartzi te outcrops have a well developed north east, south west trending joint system from which the main drainage lines from the Jointing in the quartzite also east, west and north west, range have developed. has lesser developed south east trending components. The faulted contact between the quartzite and metamorphics trends north west, south east. The north western Siddeley Range and land towards the immediate north east is of excision interest. To the north east of the range, broad drainages and associated alluvium trend north east then east from the base of the range overlying a succession of Ngalia basin sediments. prospective potable groundwater targets were considered to be associated with faults and jointing (fracture aquifers) in the vaughan Springs Quartzite and in younger sediments (sandstones) and alluvium to the north east of the range. Four sites we re flagged, two of these targeting Quartzite fracture aquifers, the other two t"argeting alluvium and/or sandstones (i.e. Yuendumu, Kerridy, or Mount Eliclipse Sandstone). See Figure 2.