Browsing by Author "Németh K"

Now showing 1 - 4 of 4
  • Thumbnail Image
    Item
    Informed geoheritage conservation: Determinant analysis based on bibliometric and sustainability indicators using ordination techniques
    (MDPI (Basel, Switzerland), 2021-05-19) Németh B; Németh K; Procter JN; Zgłobicki W
    Ordination methods are used in ecological multivariate statistics in order to reduce the number of dimensions and arrange individual variables along environmental variables. Geoherit-age designation is a new challenge for conservation planning. Quantification of geoheritage to date is used explicitly for site selection, however, it also carries significant potential to be one of the indicators of sustainable development that is delivered through geosystem services. In order to achieve such a dominant position, geoheritage needs to be included in the business as usual model of conservation planning. Questions about the quantification process that have typically been addressed in geoheritage studies can be answered more directly by their relationships to world development indicators. We aim to relate the major informative geoheritage practices to underlying trends of successful geoheritage implementation through statistical analysis of countries with the highest trackable geoheritage interest. Correspondence analysis (CA) was used to obtain information on how certain indicators bundle together. Multiple correspondence analysis (MCA) was used to detect sets of factors to determine positive geoheritage conservation outcomes. The analysis resulted in ordination diagrams that visualize correlations among determinant variables translated to links between socio‐economic background and geoheritage conservation outcomes. Indicators derived from geoheritage‐related academic activity and world development metrics show a shift from significant Earth science output toward disciplines of strong international agreement such as tourism, sustainability and biodiversity. Identifying contributing factors to conservation‐related de-cisions helps experts to tailor their proposals for required evidence‐based quantification reports and reinforce the scientific significance of geoheritage.
  • Thumbnail Image
    Item
    Shallow magmatic processes revealed by cryptic microantecrysts: a case study from the Taupo Volcanic Zone
    (Springer Nature, 2021-11-05) Lormand C; Zellmer GF; Sakamoto N; Ubide T; Kilgour G; Yurimoto H; Palmer A; Németh K; Iizuka Y; Moebis A
    Arc magmas typically contain phenocrysts with complex zoning and diverse growth histories. Microlites highlight the same level of intracrystalline variations but require nanoscale resolution which is globally less available. The southern Taupo Volcanic Zone (TVZ), New Zealand, has produced a wide range of explosive eruptions yielding glassy microlite-bearing tephras. Major oxide analyses and textural information reveal that microlite rims are commonly out of equilibrium with the surrounding glass. We mapped microlites and microcrysts at submicron resolution for major and trace element distributions and observed three plagioclase textural patterns: (1) resorption and overgrowth, (2) oscillatory zoning, and (3) normal (sharp) zoning. Pyroxene textures are diverse: (1) resorption and overgrowth, (2) calcium-rich bands, (3) hollow textures, (4) oscillatory zoning, (5) sector zoning, (6) normal zoning and (7) reverse zoning. Microlite chemistry and textures inform processes operating during pre-eruptive magma ascent. They indicate a plumbing system periodically intruded by short-lived sub-aphyric dykes that entrain microantecrysts grown under diverse physico-chemical conditions and stored in rapidly cooled, previously intruded dykes. Changes in temperature gradients between the intrusion and the host rock throughout ascent and repeated magma injections lead to fluctuations in cooling rates and generate local heterogeneities illustrated by the microlite textures and rim compositions. Late-stage degassing occurs at water saturation, forming thin calcic microcryst rims through local partitioning effects. This detailed investigation of textures cryptic to conventional imaging shows that a significant proportion of the micrometre-sized crystal cargo of the TVZ is of antecrystic origin and may not be attributed to late-stage nucleation and growth at the onset of volcanic eruptions, as typically presumed.
  • Thumbnail Image
    Item
    The Ghosts of Old Volcanoes, a Geoheritage Trail Concept for Eastern Coromandel Peninsula, New Zealand
    (Islamic Azad University-Isfahan Branch, 1/08/2020) Gravis I; Németh K; Twemlow C; Németh B
    Re-imagining the geotourism experience through the lens of slow tourism, in this paper we lay out a pathway towards a more nourishing, engaging, and educational experience that contributes to both geoconservation and a reshaping of the tourism economy in light of recent disruption caused by the Covid-19 pandemic. Evidence suggests that to date, and further highlighted by unfolding local and global responses to the pandemic, mainstream approaches to conservation, protection, and tourism have poorly served our unique geoheritage landscapes and features. We demonstrate the potential for community led development utilising internationally recognised practises to provide a foundation for low impact and sustainable tourism, education, and training opportunities of benefit to local, regional, and national communities. We identify the eastern Coromandel, including Kuaotunu Peninsula, as an area for potential research and identification of sites with high geological, environmental, and cultural values. A geotrail has the potential to tell the story of formation of rhyolitic caldera walls enclosing translucent azure waters framed by white silica sands. Cultural sites are a landscape record giving voice to indigenous Māori that began the human story of adapting to and modifying the landscape. Our premise is that a geotrail offers a more sophisticated experience by weaving together conservation stories, science communication, indigenous history, and local lore. Our goal is to develop a physical and virtual geotrail, complemented by learning and promotional media highlighting the layers of natural and human history, building on a foundation of already published scientific, social, and historical research. Global disruption caused by the current pandemic gives us cause to reflect and consider management of a growing tourism footprint and economic reliance on singular landscapes. We recognise this as an opportunity to reassess a tourism model based on a high-volume of short stay visits to iconic sites.
  • Thumbnail Image
    Item
    Visitation Rate Analysis of Geoheritage Features from Earth Science Education Perspective Using Automated Landform Classification and Crowdsourcing: A Geoeducation Capacity Map of the Auckland Volcanic Field, New Zealand
    (MDPI (Basel, Switzerland), 2021-11-22) Németh B; Németh K; Procter JN; Jordá Pardo JF
    The increase in geoheritage studies has secured recognition globally regarding the importance of abiotic natural features. Prominent in geoheritage screening practices follows a multicriteria assessment framework; however, the complexity of interest in values often causes decision making to overlook geoeducation, one of the primary facets of geosystem services. Auckland volcanic field in New Zealand stretches through the whole area of metropolitan Auckland, which helps preserve volcanic cones and their cultural heritage around its central business district (CBD). They are important sites for developing tourist activities. Geoeducation is becoming a significant factor for tourists and others visiting geomorphological features, but it cannot be achieved without sound planning. This paper investigates the use of big data (FlickR), Geopreservation Inventory, and Geographic Information System for identifying geoeducation capacity of tourist attractions. Through landform classification using the Topographic Position Index and integrated with geological and the inventory data, the underpromoted important geoeducation sites can be mapped and added to the spatial database Auckland Council uses for urban planning. The use of the Geoeducation Capacity Map can help resolve conflicts between the multiple objectives that a bicultural, metropolitan city council need to tackle in the planning of upgrading open spaces while battling of growing demand for land.