Gravity survey and modelling of the Nemocón salt mine, Colombia

The Llobregat is a 156 km long river, which supplies 35% of the Barcelona's drinking water needs from the Sant Joan Despí Water Treatment Plant. Since the establishment of the Salt Mine Works in the Llobregat basin in 1923, a progressive salinization of the water sources has been recorded. The operation of the Brine Collector, as a public work carried out by Aigües de Barcelona (AGBAR), started in 1989; it enabled a very significant improvement in the quality of the surface water used for drinking-water production.

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Regional gravity survey, northern Marysvale volcanic field, south-central Utah

Geological Society of America Bulletin ◽

10.1130/0016-7606(1980)91<502:rgsnmv>2.0.co;2 ◽

1980 ◽

Vol 91 (8) ◽

pp. 502

Author(s):

MARK E. HALLIDAY ◽

KENNETH L. COOK

Keyword(s):

Volcanic Field ◽

Gravity Survey ◽

South Central ◽

Regional Gravity

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A DETAILED GRAVITY SURVEY IN THE AREA OF CENTRAL NEW HAMPSHIRE

10.1130/abs/2017ne-290671 ◽

2017 ◽

Author(s):

Nicholas C. Savage ◽

◽

Shayla Bruce ◽

Esteban Cordova ◽

Margaret E Garate ◽

...

Keyword(s):

New Hampshire ◽

Gravity Survey

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A DETAILED ANALYSIS BETWEEN GROUND LOCAL GRAVITY KIMBERLITE SURVEY AND STATE-WIDE GRAVITY SURVEY WITHIN KANSAS

10.1130/abs/2019sc-327826 ◽

2019 ◽

Author(s):

KayLeigh Rogers ◽

◽

Claudia Adam ◽

Pamela D. Kempton

Keyword(s):

Detailed Analysis ◽

Gravity Survey ◽

Local Gravity

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Geological CO2 quantified by high-temporal resolution stable isotope monitoring in a salt mine

Scientific Reports ◽

10.1038/s41598-020-77635-5 ◽

2020 ◽

Vol 10 (1) ◽

Author(s):

Alexander H. Frank ◽

Robert van Geldern ◽

Anssi Myrttinen ◽

Martin Zimmer ◽

Johannes A. C. Barth ◽

...

Keyword(s):

Temporal Resolution ◽

Underground Mining ◽

Stable Carbon Isotope ◽

Underground Mines ◽

Background Concentration ◽

High Temporal Resolution ◽

Salt Mine ◽

Gas Migration ◽

Mining Operations ◽

Anthropogenic Contributions

AbstractThe relevance of CO2 emissions from geological sources to the atmospheric carbon budget is becoming increasingly recognized. Although geogenic gas migration along faults and in volcanic zones is generally well studied, short-term dynamics of diffusive geogenic CO2 emissions are mostly unknown. While geogenic CO2 is considered a challenging threat for underground mining operations, mines provide an extraordinary opportunity to observe geogenic degassing and dynamics close to its source. Stable carbon isotope monitoring of CO2 allows partitioning geogenic from anthropogenic contributions. High temporal-resolution enables the recognition of temporal and interdependent dynamics, easily missed by discrete sampling. Here, data is presented from an active underground salt mine in central Germany, collected on-site utilizing a field-deployed laser isotope spectrometer. Throughout the 34-day measurement period, total CO2 concentrations varied between 805 ppmV (5th percentile) and 1370 ppmV (95th percentile). With a 400-ppm atmospheric background concentration, an isotope mixing model allows the separation of geogenic (16–27%) from highly dynamic anthropogenic combustion-related contributions (21–54%). The geogenic fraction is inversely correlated to established CO2 concentrations that were driven by anthropogenic CO2 emissions within the mine. The described approach is applicable to other environments, including different types of underground mines, natural caves, and soils.

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