Initial sedimentation and subsequent diagenesis in the Eastern Southland Lignite Basin, southern New Zealand

Tectonic controls on the evolution of the Clutha River catchment, New Zealand

“…This history has been elucidated by observations on provenance of distinctive sedimentary clasts through the sequence (Youngson et al 1998;McDonnell & Craw 2003;Stein et al 2011). Results of past studies, combined with observations made as part of this study, have been incorporated into the deductions throughout this paper.…”

“…3;Douglas 1986;Youngson et al 1998), and these sediments were also transported to eastern Southland ( Fig. 3; Stein et al 2011). A broad shallow lake, Lake Manuherikia, developed in a broad depression in the basement (Douglas 1986) and lacustrine sediments from the lake (Bannockburn Formation) overlie the Dunstan Formation (Fig.…”

Gold nugget morphology and geochemical environments of nugget formation, southern New Zealand

“…The basement for the drillhole is metagreywacke, rather than schist, but has similar mineralogy and chemical composition to the schist basement in the goldfield. Rock major element data on the drill core were obtained by X-ray fluorescence using a Philips 2400 instrument at University of Otago, with international standards for calibration (Stein et al, 2011). Volatile contents, mainly water, was determined by loss on ignition by heating at 1100°C for 1 h. Geochemical data on surface and groundwater compositions were compiled from a range of sources outlined in Craw and Nelson (2000); Craw (2000); Litchfield et al (2002); Craw et al (2013), and Druzbicka et al (2015).…”

“…Mineralogy and geochemical data of an in situ substratal alteration zone were obtained from drill core through basal Cenozoic sediments into the underlying altered rocks, as described by Stein et al (2011). This drill core was extracted from the distal equivalents, in Southland ( Fig.…”

“…X-ray fluorescence analyses, with associated loss on ignition data, of rocks down a drillhole through the basement alteration zone beneath Miocene sediments (data fromStein et al, 2011).…”