SEDIMENTARY PROVENANCE STUDIES IN AUSTRALIAN BASINS USING NEODYMIUM MODEL AGES

1994 ◽  
Vol 34 (1) ◽  
pp. 320
Author(s):  
D. J. Whitford ◽  
P.J. Hamilton ◽  
J. Scott
Keyword(s):  
Sedimentary Rock ◽  
Quantitative Information ◽  
Basin Evolution ◽  
North West ◽  
Provenance Studies ◽  
Earth’S Mantle ◽  
The North ◽  
Sedimentary Provenance ◽  
Over Time ◽  
Eromanga Basin

An understanding of the tinting of basin evolution is fundamental to the development of successful play concepts. The Sm-Nd geochronometer can be used to determine quantitatively the `average' age at which segments of continental crust have been extracted from the earth's mantle. Variations in Nd model ages within sedimentary rock sequences indicate changes in sedimentary provenance over time and provide a potential correlation tool.In the Eromanga Basin, there is a distinct lithological contrast between the main reservoir unit, the Jurassic Hutton Sandstone, and the overlying Birkhead Formation. The quartz-rich Hutton Sandstone is characterised by relatively old Nd model ages, generally within the range 1.3–1.5 Ga. In contrast the lithic-rich Birkhead Formation has much younger model ages, generally Neodymium model ages measured in mudstones within the Flag Sandstone from the Harriet Field in the Barrow Sub-basin of the North West Shelf, range from 2.1–2.5 Ga. The old ages are consistent with the sediments being derived from the Archaean shield areas and the younger Proterozoic complexes of Western Australia. Tentative correlations based on model ages between mudstone units from two wells are consistent with correlations based on heavy mineral suites.Neodymium model ages have application to correlation at both regional and local scales within basins. Reliable information can be obtained on both sandstones and mudstones on samples as small 50 g. Potentially they can provide important quantitative information complementary to that derived from more conventional approaches.

scholarly journals Modelling Local Patterns of Children Mortality. A Bayesian Spatio-Temporal Analysis.

2019 ◽  
Author(s):  
Alejandro Lome-Hurtado ◽  
Jacques Lartigue Mendoza ◽  
Juan Carlos Trujillo
Keyword(s):  
High Risk ◽  
Mortality Risk ◽  
Temporal Analysis ◽  
Health Concern ◽  
North West ◽  
The North ◽  
Policy Interventions ◽  
Medium Risk ◽  
Spatio Temporal ◽  
Over Time

Abstract Background: The number of death children at the international scale are still high, but with proper spatially-targeted health public policies this number could be reduced. In Mexico, children mortality is a particular health concern due to its alarming rate all throughout North America. The aims of this study are i) to model the change of children mortality risk at the municipality level, (ii) to identify municipalities with high, medium and low risk over time and (iii) to ascertain potential high-risk municipalities across time, using local trends of each municipality in Greater Mexico City. Methods: The study uses Bayesian spatio-temporal analysis to control for space-time patterns of data. This allow to model the geographical variation of the municipalities within the time span studied. Results: The analysis shows that most of the high-risk municipalities are in the north, west, and some in the east; some of such municipalities show an increasing children mortality risk over time. The outcomes highlight some municipalities which show a medium risk currently but are likely to become high risk along the study period. Finally, the odds of children mortality risk illustrate a decreasing tendency over the 7-year framework. Conclusions: Identification of high-risk municipalities may provide a useful input to policy-makers seeking out to reduce the incidence of children mortality, since it would provide evidence to support geographical targeting for policy interventions.

scholarly journals The Development of Labial Clusters in the Aśokan Rock Edicts

2021 ◽  
Vol 9 (1) ◽  
pp. 160-172
Author(s):  
Yasuko Suzuki
Keyword(s):  
Consonant Clusters ◽  
The West ◽  
North West ◽  
The North ◽  
Over Time

The original range of consonant clusters in Indo-Aryan reduced significantly over time, developing into geminates, homorganic nasal-stop clusters, and sonorant-h clusters in Middle Indo-Aryan. Early Middle Indo-Aryan, as represented in the Aśokan inscriptions, however, still maintained the original clusters, or what appear to be transitional stages of the extensive changes. Salient among those cluster changes that are observed in the Aśokan inscriptions are the changes tm, tv> tp and dv > db in Girnār in the west; sm, sv > sp in Shāhbāzgaṛhī and Mānsehrā in the north-west; and mh > mbh in Kālsī in the north and in Dhaulī and Jaugaḍa in the east. The idiosyncratic nature of these changes lies in the development of a stop from m or v, where the more usual changes would be loss or assimilation of m after a stop and of v after a stop or a sibilant, while sm and hm would normally change to mh. This paper examines the manner assimilation of the “labial” clusters (that is, the clusters with m or v that normally do not incur assimilation of the adjacent consonant) in the Aśokan Rock Edicts. It discusses the conditions, the motivation, the course of the change of m/v to a labial stop, and the dialectal differences associated with this change.

scholarly journals Long-Term Influences of Stunting, Being Underweight, and Thinness on the Academic Performance of Primary School Girls: The NW-CHILD Study

2021 ◽  
Vol 18 (17) ◽  
pp. 8973
Author(s):  
Xonné Haywood ◽  
Anita Elizabeth Pienaar
Keyword(s):  
South Africa ◽  
Academic Performance ◽  
Primary School ◽  
North West ◽  
The North ◽  
Bonferroni Adjustment ◽  
North West Province ◽  
School Girls ◽  
Over Time

Poor socio-economic status contributes to undernutrition which, in turn, can increase the risk of academic underachievement. This study wants to determine if stunting, being underweight, and thinness show long term relations with academic performance in primary school girls aged 6 to 13 in the North West province of South Africa. A randomized and stratified longitudinal research design including a baseline and two time-point measurements over seven school years was used. The sample included girls aged 6 to 13 years (N = 198) in the North West province of South Africa. Academic performance in the June school assessments and national and provincial assessments in grades 1, 4, and 7 were used to determine academic performance. Independent t-testing was used to determine differences between thinness, underweight and stunted girls as opposed to a reference group with no undernutrition indices. A repeated measures ANOVA and post hoc Bonferroni adjustment analyzed relations over time. Normal weight girls significantly outperformed stunted girls academically (p < 0.05) over time. Stunting had prolonged and significant negative influences on language, mathematics, and grade point average (p < 0.05). Early identification of undernutrition, especially stunting, is important for intervention and the implementation of timely prevention strategies, especially during early childhood years.

LITHOSTRATIGRAPHY OF THE LOWER EROMANGA BASIN SEQUENCE IN SOUTH WEST QUEENSLAND

1987 ◽  
Vol 27 (1) ◽  
pp. 196
Author(s):  
B.H. John ◽  
C.S. Almond
Keyword(s):  
High Energy ◽  
Depositional Environments ◽  
Oil Fields ◽  
North West ◽  
The North ◽  
Investigation Area ◽  
South West ◽  
Basin Surface ◽  
Petroleum Wells ◽  
Eromanga Basin

Five fully-cored and wire-line logged stratigraphic bores have been drilled by the Queensland Department of Mines, relatively close to producing oil fields in the Eromanga Basin, south-west Queensland. Correlations between the stratigraphic bores and petroleum wells have established lithologic control in an area where lithostratigraphy is interpreted mainly from wire-line logs. The Eromanga Basin sequence below the Wallumbilla Formation has been investigated, and a uniform lithostratigraphic nomenclature has been applied; in the past, an inconsistent nomenclature system was applied in different petroleum wells.Accumulation of the Eromanga Basin sequence was initiated in the early Jurassic by major epeirogenic downwarping; in the investigation area the pre-Eromanga Basin surface consists mainly of rocks comprising the Thargomindah Shelf and the Cooper Basin. The lower Eromanga Basin sequence in the area onlaps the Thargomindah Shelf and thickens relatively uniformly to the north-west. The sequence comprises mainly Jurassic/Cretaceous terrestrial units in which vertical and lateral distribution is predominantly facies-controlled. These are uniformly overlain by the mainly paralic Cadna-owie Formation, signalling the initiation of a major Cretaceous transgression over the basin.The terrestrial sequence over most of the area comprises alternating coarser and finer-grained sedimentary rocks, reflecting major cyclical changes in the energy of the depositional environment. The Hutton Sandstone, Adori Sandstone and 'Namur Sandstone Member' of the Hooray Sandstone comprise mainly sandstone, and reflect high energy fluvial depositional environments. Lower energy fluvial and lacustrine conditions are reflected by the finer-grained sandstone, siltstone and mudstone of the Birkhead and Westbourne Formations, and 'Murta Member' of the Hooray Sandstone. Similar minor cycles are represented in the 'basal Jurassic' unit. The Algebuckina Sandstone, recognised only in the far south-west of the investigation area, comprises mainly fluvial sandstones.

Pre-basaltic sediments (Aptian–Paleocene) of the Kangerlussuaq Basin, southern East Greenland

2001 ◽  
pp. 99-106 ◽  
Author(s):  
Michael Larsen ◽  
Morten Bjerager ◽  
Tor Nedkvitne ◽  
Snorre Olaussen ◽  
Thomas Preuss
Keyword(s):  
North Atlantic ◽  
Deep Water ◽  
Sediment Supply ◽  
Basin Evolution ◽  
East Greenland ◽  
Sea Floor ◽  
North West ◽  
The North ◽  
The North Atlantic ◽  
Sea Floor Spreading

NOTE: This article was published in a former series of GEUS Bulletin. Please use the original series name when citing this article, for example: Larsen, M., Bjerager, M., Nedkvitne, T., Olaussen, S., & Preuss, T. (2001). Pre-basaltic sediments (Aptian–Paleocene) of the Kangerlussuaq Basin, southern East Greenland. Geology of Greenland Survey Bulletin, 189, 99-106. https://doi.org/10.34194/ggub.v189.5163 _______________ The recent licensing round in the deep-water areas south-east of the Faeroe Islands has emphasised the continued interest of the oil industry in the frontier areas of the North Atlantic volcanic margins. The search for hydrocarbons is at present focused on the Cretaceous– Paleocene succession with the Paleocene deepwater play as the most promising (Lamers & Carmichael 1999). The exploration and evaluation of possible plays are almost solely based on seismic interpretation and limited log and core data from wells in the area west of the Shetlands. The Kangerlussuaq Basin in southern East Greenland (Fig. 1) provides, however, important information on basin evolution prior to and during continental break-up that finally led to active sea-floor spreading in the northern North Atlantic. In addition, palaeogeographic reconstructions locate the southern East Greenland margin only 50–100 km north-west of the present-day Faeroe Islands (Skogseid et al. 2000), suggesting the possibility of sediment supply to the offshore basins before the onset of rifting and sea-floor spreading. In this region the Lower Cretaceous – Palaeogene sedimentary succession reaches almost 1 km in thickness and comprises sediments of the Kangerdlugssuaq Group and the siliciclastic lower part of the otherwise basaltic Blosseville Group (Fig. 2). Note that the Kangerdlugssuaq Group was defined when the fjord Kangerlussuaq was known as ‘Kangerdlugssuaq’. Based on field work by the Geological Survey of Denmark and Greenland (GEUS) during summer 1995 (Larsen et al. 1996), the sedimentology, sequence stratigraphy and basin evolution of the Kangerlussuaq Basin were interpreted and compared with the deep-water offshore areas of the North Atlantic (Larsen et al. 1999a, b).

scholarly journals Developments in Animal Husbandry and Food Supply in Roman Germania Inferior

2017 ◽  
Vol 20 (3) ◽  
pp. 451-471 ◽  
Author(s):  
Maaike Groot
Keyword(s):  
Food Supply ◽  
Animal Husbandry ◽  
River Rhine ◽  
North West ◽  
The North ◽  
The Subject ◽  
Rural Sites ◽  
Roman Province ◽  
Species Proportions ◽  
Over Time

The Roman province of Germania Inferior is characterized geographically by the river Rhine—the border of the Empire—and the forts along it. From the north-west to the south-east, there are significant differences in landscape and type of rural habitation. Whether these differences are also noticeable in animal husbandry forms the subject of this article. Are there any differences in species proportions and slaughter ages between the western and eastern parts of the province, and between urban, military, and rural sites? What does this say about farming and food supply? After presenting an overview of the zooarchaeological data from Germania Inferior, I shall discuss in detail one civitas—the civitas Batavorum, with the best known zooarchaeological dataset within the province. What changes in species proportions and cattle size can be detected over time from this civitas? Is there evidence for inter- and intra-site variability and changes in butchery methods? This article's further aim is to demonstrate what kind of questions a synthetic overview of zooarchaeological datasets can address.

Tectonic controls on sedimentary provenance and basin geography of the Mesoproterozoic Wilton package, McArthur Basin, northern Australia

2020 ◽  
pp. 1-20
Author(s):  
Bo Yang ◽  
Alan S. Collins ◽  
Morgan L. Blades ◽  
Tim J. Munson ◽  
Justin L. Payne ◽  
...  
Keyword(s):  
Fault Zone ◽  
Sedimentary Rocks ◽  
Spatial And Temporal Variation ◽  
Published Data ◽  
Basin Evolution ◽  
Northern Australia ◽  
The North ◽  
Sedimentary Provenance ◽  
Depositional Systems ◽  
Tectonic Framework

Abstract The c. 1.5–1.3 Ga Wilton package, the upper succession of the greater McArthur Basin, preserves detailed tectono-sedimentary evidence for the Mesoproterozoic evolution of the North Australian Craton (NAC). In addition, it is a valuable global sedimentary repository for the poorly explored Mesoproterozoic. New detrital zircon U–Pb age and Lu–Hf isotope data, collected from multiple, geographically separated, basins that make up the Wilton package, are compiled with previously published data to illuminate the basin evolution. The spatial and temporal variation in sedimentary provenance illustrates two major geographic changes that correspond to continent-scale tectonic convulsions of the NAC during the Mesoproterozoic. The first is shown by the influx of sediment sourced from east and southeast terranes. This is linked to rifting between Proterozoic Australia and Laurentia at c. 1.45 Ga, resulting in the uplift of the eastern margin of the NAC–SAC (South Australian Craton). The second basin geographic change is illustrated by a flux of southerly-sourced detritus that is interpreted to be tectonically driven by the uplift of the southern NAC, during the subduction/closure of the Mirning Ocean at c. 1.32 Ga. Spatially, sediment in the Wilton package is separated into two depositional systems: sedimentary rocks within the Birrindudu Basin, the western component of the Wilton package, have different detrital signatures relative to other Wilton package successions found east of the Daly Waters Fault Zone, in the Beetaloo Sub-basin, the McArthur Basin and the South Nicholson Basin. The Daly Waters Fault Zone is interpreted as an ancient bathymetric high, blocking sediment transport. Although they differ in sources, rocks in both the Birrindudu Basin and the eastern Wilton package record coeval shifts of basin provenance to southern sources. The coherent evolution of basin provenance indicates a consistent tectono-sedimentation history, and links the Birrindudu Basin and the other Wilton successions in a tectonic framework.

scholarly journals Life Expectancy Heterogeneity and Pension Fairness: An Italian North-South Divide

Risks ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 57
Author(s):  
Fabrizio Culotta
Keyword(s):  
Life Expectancy ◽  
Transfer Mechanism ◽  
North West ◽  
Tax Subsidy ◽  
North East ◽  
The North ◽  
Geographical Perspective ◽  
Year 2000 ◽  
Italian Territory ◽  
Over Time

This work documents a persistent life expectancy heterogeneity by gender and geography in Italy during the period 1995–2019. Based on deviations of life expectancy at age 65, it quantifies the implicit tax/subsidy mechanism triggered when pensions annuities are computed by adopting the same value of longevity for the whole population. The intensity of this transfer mechanism is then measured and projected over the decade 2020–2030. Results show that females are subsidized while males are taxed by around 10%. Differences by geography persist along the Italian territory. Since 1995 the macroarea of Mezzogiorno has been taxed by 2%, Center and North-West macroareas are being subsidized by around 1%, whereas North-East by 2%. The intensity of the mechanism, despite decreases over time, is higher among females since the year 2000. From a geographical perspective, the macroarea of Mezzogiorno shows the lowest intensity, but also the lowest reduction as compared to other macroareas. Projections indicate that the North-South divide in this implicit transfer mechanism will persist over the next decade.

scholarly journals SPATIO-TEMPORAL CHANGE of ATMOSPHERIC PRECIPITATION ON TERRITORY of NORTH-WEST of UKRAINE

2020 ◽  
Vol 2 (4) ◽  
Author(s):  
Svetlana Vasilivna Budnik
Keyword(s):  
Climate Change ◽  
Temporal Change ◽  
Atmospheric Precipitation ◽  
General Tendency ◽  
Present Stage ◽  
North West ◽  
Space And Time ◽  
The North ◽  
Spatio Temporal ◽  
Over Time

The direction of the trend of precipitation over time is an important characteristic for both theoretical and practical use. The presented study is devoted to the analysis of changes in the territory of the trend of precipitation over the year over time. At the present stage of climate change in the north-west of Ukraine, there is a general tendency to increase rainfall over the year. This trend is not the same across the territory and depends on the height and latitude of the area. The amount of precipitation varies both in space and in time, however, the distribution of the characteristics of the rains themselves (intensity, duration and others) continue to remain similar throughout the territory. The revealed features of changes in the amount of precipitation in space and time can be useful in studying the unevenness of wetting, forecasting floods, changes in erosion activity, etc.

scholarly journals Community Composition and Distribution Pattern of Herbaceous Flora in Holi Area of District Chamba in Himachal Pradesh

2020 ◽  
Vol 7 (1) ◽  
pp. 013-020
Author(s):  
Kehar Singh Thakur ◽  
◽  
Munesh Kumar ◽  
Rajan Bawa ◽  
Anita Kumari ◽  
...  
Keyword(s):  
Distribution Pattern ◽  
Dominant Species ◽  
Basal Area ◽  
Quantitative Information ◽  
Himachal Pradesh ◽  
Importance Value Index ◽  
Importance Value ◽  
North West ◽  
The North ◽  
The Mean

The present study was carried out in Holi Forest Range of district Chamba, which is the north-west district of Himachal Pradesh and is located between latitude 32o17’412’’ to 32o26’541’’N and longitude 76o31’504’’ to 76o35’385’’E. The territory is completely mountainous with altitude varying from about 2,000 feet (610 m) to about 21,000 feet (6,400 m) above the mean sea level. The quantitative information of herbs was collected from different sites i.e., Deol, Kut, Dal, Lahaud Dhar. Frequency (%), Density (plants m-2), Basal Area (cm2), Importance Value Index (IVI) and A/F ratio of plant species at different sites were recorded. Poa alpina was found to have highest frequency (90%) closely followed by Jurinea dolomiaea (80%) and Biebersteinia odora has the lowest frequency of 10%. Poa alpina has the highest density (60.6 plants m-2) at Dal followed by Gentiana kurrooa (35.8 plants m-2). Moschela esculenta was found to have highest basal area (1.234 cm2) at Kut. Viola serpens was the dominant species with highest value of IVI (78.77) closely followed by Poa alpina (65.91), Gentiana kurrooa (65.37) and Jurinea dolomiaea (65.36). Most of the species were distributed randomly followed by contagious pattern of distribution and least species were reported for regular distribution pattern.

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