title: Tubular concretions in New Zealand petroliferous basins: Lipid biomarker evidence for mineralisation around proposed miocene hydrocarbon seep conduits

authors: Pearson, Michael J.

subjects: Tubular concretion

abstract: Trapped organic compounds (lipids) have been analysed in tubular carbonate concretions and their host sediments in Miocene deep water mudrocks from coastal outcrops in East Coast Basin and Taranaki Basin of North Island, New Zealand. The concretions, including calcitic, dolomitic and mixed mineralogies, have varied morphologies in many cases suggestive of conduits or pipes that channelled the escape of subsurface fluids and/or hydrocarbon gases. The extracted lipids include water column and/or diagenetically-derived alkanes, fatty acids and alcohols as well as specific marker compounds (including archaeal pentamethylicosane (PMI) and archaeol) associated with subsurface anaerobic oxidation of upwardly seeping methane gas (AOM). Strong carbon-13 isotopic depletions (δ13C –75 to –120‰) measured for PMI, archaeol and other AOM-specific marker compounds on three concretion samples support involvement of AOM in generating bicarbonate-rich fluid that was at least partly responsible for cementing the pipe-like concretions and central conduits. Other morphological types appear not to be AOM-related. Sterane and n-alkane parameters indicate low thermal maturity of the extracted organic matter. The molecular and compound specific isotopic organic geochemical evidence that some tubular concretions functioned as methane conduits thus supports an assertion that the tubular concretions represent 'fossilised' parts of the subsurface plumbing of biogenic or thermogenic hydrocarbon-fed cold seep systems.

text: Tubular concretions in New Zealand petroliferous basins: Lipid biomarker evidence for mineralisation around proposed miocene hydrocarbon seep conduits Trapped organic compounds (lipids) have been analysed in tubular carbonate concretions and their host sediments in Miocene deep water mudrocks from coastal outcrops in East Coast Basin and Taranaki Basin of North Island, New Zealand. The concretions, including calcitic, dolomitic and mixed mineralogies, have varied morphologies in many cases suggestive of conduits or pipes that channelled the escape of subsurface fluids and/or hydrocarbon gases. The extracted lipids include water column and/or diagenetically-derived alkanes, fatty acids and alcohols as well as specific marker compounds (including archaeal pentamethylicosane (PMI) and archaeol) associated with subsurface anaerobic oxidation of upwardly seeping methane gas (AOM). Strong carbon-13 isotopic depletions (δ13C –75 to –120‰) measured for PMI, archaeol and other AOM-specific marker compounds on three concretion samples support involvement of AOM in generating bicarbonate-rich fluid that was at least partly responsible for cementing the pipe-like concretions and central conduits. Other morphological types appear not to be AOM-related. Sterane and n-alkane parameters indicate low thermal maturity of the extracted organic matter. The molecular and compound specific isotopic organic geochemical evidence that some tubular concretions functioned as methane conduits thus supports an assertion that the tubular concretions represent 'fossilised' parts of the subsurface plumbing of biogenic or thermogenic hydrocarbon-fed cold seep systems.

year: 2010

title: Integrating product design and supply chain management for a circular economy

authors: Burke, Hayden

subjects: Circular Economy

abstract: Circular economy (CE) provides an alternative development model to the dominant take-make-dispose linear approach, and thus a new vision for solving sustainability challenges. Firms need to operationalise CE in their supply chain operations, starting from circular product design as the foundational step. The purpose of this paper is to investigate how to integrate product design and supply chain management (SCM) decisions for a CE transition. A thematic analysis was conducted on data collected from 15 semi-structured interviews in New Zealand. Four propositions were established based on the identified themes, namely, end-of-life thinking in product design, circular SCM, business model innovation,
and sustainable organisational values. The study results provide a novel insight into the integration of product design and SCM for a CE transition. The operational framework developed provides guidance to product designers, managers, and researchers to advance the CE cause at the supply chain level.

text: Integrating product design and supply chain management for a circular economy Circular economy (CE) provides an alternative development model to the dominant take-make-dispose linear approach, and thus a new vision for solving sustainability challenges. Firms need to operationalise CE in their supply chain operations, starting from circular product design as the foundational step. The purpose of this paper is to investigate how to integrate product design and supply chain management (SCM) decisions for a CE transition. A thematic analysis was conducted on data collected from 15 semi-structured interviews in New Zealand. Four propositions were established based on the identified themes, namely, end-of-life thinking in product design, circular SCM, business model innovation,
and sustainable organisational values. The study results provide a novel insight into the integration of product design and SCM for a CE transition. The operational framework developed provides guidance to product designers, managers, and researchers to advance the CE cause at the supply chain level.

year: 2021-10-05

title: Te Piringa

authors: Dickson, Matiu

abstract: Māori have an oral tradition, that is, the transfer of knowledge within and between generations, which was carried out orally by way of story-telling or the more formal speech-making. Ngā korero purākau are the stories and whaikōrero is formal talking on the marae or ancestral gathering places of Māori people. The value of public speaking is expressed in the saying: Ko te kōrerote kai a te Rangatira – (The chiefs thrive on talking and debating). This article looks at the transfer of knowledge to the next generation.

text: Te Piringa Māori have an oral tradition, that is, the transfer of knowledge within and between generations, which was carried out orally by way of story-telling or the more formal speech-making. Ngā korero purākau are the stories and whaikōrero is formal talking on the marae or ancestral gathering places of Māori people. The value of public speaking is expressed in the saying: Ko te kōrerote kai a te Rangatira – (The chiefs thrive on talking and debating). This article looks at the transfer of knowledge to the next generation.

year: 2010