A geochemical atlas of North Carolina, USA

Reid, Jeffrey C.

doi:10.1016/0375-6742(93)90056-r

Cited by 16 publications

(13 citation statements)

References 2 publications

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“…Geochemical maps have been constructed using stream sediment geochemical data from all over the world in order to identify possible sources of anomalous element concentrations (Thalmann et al 1988, Reid 1993, Atsuyuki et al 2005.…”

Section: Introductionmentioning

confidence: 99%

Metal contamination assessment in the urban stream sediments and tributaries of coastal area southwest Nigeria

Odukoya

Akande

2015

Chin. J. Geochem.

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A geochemical assessment of the fifty surface stream sediments from Ikorodu Southwest Nigeria was carried out to determine the level of contamination. The sediments were dried, disaggregated and sieved to \75 lm fraction for geochemical analysis, using the aqua-regia digestion technique and inductively coupled plasma mass spectrometry. Major elements showed the following trendTi and were below the average shale concentration, except for Na in one sample. Results from factor and correlation analyses showed two groups of trace elements Ni, Co, Mn, U, Th,

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Section: Introductionmentioning

confidence: 99%

Metal contamination assessment in the urban stream sediments and tributaries of coastal area southwest Nigeria

Odukoya

Akande

2015

Chin. J. Geochem.

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“…Using the North Carolina Center for State Health Statistics data combined for years 1997-2001, infant mortality was derived by county as deaths 1 year of age per 1,000 live births, and the percent of low birth weight births (<2,500 g) was derived for 2001 (North Carolina State Center for Health Statistics). Average county groundwater manganese concentrations (lg/L) were then obtained from the North Carolina Geological Survey groundwater database (Reid, 1993). This database contains 5,778 total samples collected from all 100 counties in North Carolina between 1973 and 1979, as described by Reid (Reid, 1993).…”

Section: Methodsmentioning

confidence: 99%

“…Average county groundwater manganese concentrations (lg/L) were then obtained from the North Carolina Geological Survey groundwater database (Reid, 1993). This database contains 5,778 total samples collected from all 100 counties in North Carolina between 1973 and 1979, as described by Reid (Reid, 1993).…”

Section: Methodsmentioning

confidence: 99%

“…To explore further the possible connection between environmental manganese exposure and infant mortality, we performed a pilot ecological study correlating groundwater manganese concentrations and the IMR by county (n = 100) within North Carolina (2000 census population = 8,049,313) using data obtained from the North Carolina State Center for Health Statistics (2009), the North Carolina Geological Survey (Reid, 1993), and the U.S. Census (2009). Whereas ecological studies have built-in limitations-for example, their results cannot be extrapolated down to the individual level-such a study design is extremely useful in detecting potential etiologic risk factors best seen at the population level (Gordis, 2000).…”

Section: Introductionmentioning

confidence: 99%

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Groundwater Manganese and Infant Mortality Rate by County in North Carolina: An Ecological Analysis

Spangler

2009

EcoHealth

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Manganese is an element essential in trace quantities but toxic in high concentrations. As a naturally occurring element in groundwater and a chemical of increasing global significance due to its growing trend of replacing lead in gasoline, vigilant assessment of its detrimental effects is essential. In response to previous research that showed a potential link between manganese and well water, we performed a pilot ecological study using data obtained from the North Carolina Center for Health Statistics, the North Carolina Geological Survey, and the U.S. Census. Our pilot study investigated the relationship between logarithmically transformed county level groundwater manganese concentrations with county level infant mortality rates (reported as deaths/1,000) within the state of North Carolina (n = 100 counties; North Carolina 2000 population = 8,049,313) using stepwise, multiple regression. Our model accounted for such confounders as low birth weight, economic status, education, and ethnicity. Across North Carolina counties, for every log increase in groundwater manganese concentration, there was a 2.074 increase in county level infant deaths per 1,000 live births. This study is the first to show on a statewide basis adverse infant mortality effects of environmental manganese. These pilot data argue for further research into a broad range of developmental effects and also may be useful to regulatory agencies interested in protecting communities' health.

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“…Its objective is to assess, demonstrate and recommend methods suitable for global geochemical mapping (Darnley, 1990;Darnley et al, 1995). Several countries have developed, or still are developing, geochemical maps (Webb, 1978;Steenfelt, 1987;Reid, 1993). It is in the spirit of this project that the geochemical investigation of Aruba was conducted, despite the fact that the area of investigation is far too small to be of interest for the IGMP.…”

Section: Introductionmentioning

confidence: 99%

Aruba - a geochemical baseline study

Oever¹

2000

Netherlands Journal of Geosciences

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A stream-sediment survey was carried out for the island of Aruba. Concentrations in stream sediments represent the abundance of chemical elements in the drainage basins. A geochemical atlas was created from the collected data and natural background values were established. Cluster analysis and pattern recognition techniques were used to gain a better understanding of the data set.Two cluster models were selected to study the various geochemical controls on the sediments and to establish a spatial basis of environmental-quality settings for the development of future environmental policies. The first cluster model was suitable to recognise in some detail the reflection of the geology on the geochemistry of the stream sediments. The second, coarser cluster model stressed the importance to distinguish between the two main Iithological units of the island when instituting natural background values. Not one uniform value per element is valid, but the value depends on the lithology.

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A geochemical atlas of North Carolina, USA

Cited by 16 publications

References 2 publications

Metal contamination assessment in the urban stream sediments and tributaries of coastal area southwest Nigeria

Metal contamination assessment in the urban stream sediments and tributaries of coastal area southwest Nigeria

Groundwater Manganese and Infant Mortality Rate by County in North Carolina: An Ecological Analysis

Aruba - a geochemical baseline study

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