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Geosciences, Volume 14, Issue 6

June 2024 - 34 articles

Cover Story: Although saline aquifers (SAs) have been used for several carbon storage (CCS) projects, depleted gas fields (DGFs) are now planned for CCS. DGFs differ from SAs in many ways, largely due to the different fluids present in them; SAs are filled with hydrostatically pressure brine, while DGFs contain sub-hydrostatic residual methane after gas production. CO2 has a lower density than brine but higher density than methane, so that SAs have a plume while DGF form a cushion. Displacing brine versus methane leads to differences in geochemical and geomechanical responses to CO2 injection, different CO2 leakage risks and significant differences in monitoring methodologies. SAs have a relatively small proportion of pores filled with CO2 but modelling suggests that DGFs have most pores filled with CO2... View this paper
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Articles (34)

  • Article
  • Open Access
3 Citations
2,308 Views
41 Pages

Trend Analysis of Climatic Variables in the Cross River Basin, Nigeria

  • Ndifon M. Agbiji,
  • Jonah C. Agunwamba and
  • Kenneth Imo-Imo Israel Eshiet

There have been several incidences of flood recently, which are believed to be aggravated by increased climatic variables as a result of perceived changes in climatic conditions (due to climate change) in the Cross River Basin. The basin is the most...

  • Article
  • Open Access
5 Citations
4,010 Views
31 Pages

This study is an efficiency comparison between four methods for the production of landslide susceptibility maps (LSMs), which include random forest (RF), artificial neural network (ANN), and logistic regression (LR) as the machine learning (ML) techn...

  • Article
  • Open Access
6 Citations
3,546 Views
15 Pages

Submarine volcanoes are more challenging to monitor than subaerial volcanoes. Yet, the large eruption of the Hunga Tonga-Hunga Ha’apai volcano in the Tonga archipelago in 2022 was a reminder of their hazardous nature and hence demonstrated the...

  • Article
  • Open Access
1 Citations
1,199 Views
7 Pages

Because of their excellent preservation record, testate zooplankters provide valuable proxy ocean climate data through the Quaternary–Recent. Commonly, specimen abundances are sought, which are time-consuming to collect manually and require tax...

  • Article
  • Open Access
2 Citations
2,715 Views
23 Pages

A Comparative Study of Susceptibility and Hazard for Mass Movements Applying Quantitative Machine Learning Techniques—Case Study: Northern Lima Commonwealth, Peru

  • Edwin Badillo-Rivera,
  • Manuel Olcese,
  • Ramiro Santiago,
  • Teófilo Poma,
  • Neftalí Muñoz,
  • Carlos Rojas-León,
  • Teodosio Chávez,
  • Luz Eyzaguirre,
  • César Rodríguez and
  • Fernando Oyanguren

This study addresses the importance of conducting mass movement susceptibility mapping and hazard assessment using quantitative techniques, including machine learning, in the Northern Lima Commonwealth (NLC). A previous exploration of the topographic...

  • Article
  • Open Access
3 Citations
1,920 Views
30 Pages

In the past fifteen years, the contamination of the Italian marine coastal environments by asbestos cement materials (ACMs) represents a known crux mostly reported or denounced by mass media and environmental associations. A recent research reporting...

  • Article
  • Open Access
7 Citations
2,168 Views
19 Pages

During an earthquake, excess pore water pressure generation in saturated silty sands causes a reduction in shear strength and even liquefaction of the soil. A comprehensive experimental program consisting of undrained cyclic simple-shear tests was un...

  • Article
  • Open Access
2 Citations
2,906 Views
24 Pages

Globally, the rapid retreat of coastal cliffs poses a profound risk to property, transport infrastructure, and public safety. To quantify and compare cliff top and cliff face retreat and identify erosion processes, this study combines historical (184...

  • Article
  • Open Access
4 Citations
3,790 Views
22 Pages

The Upper Miocene–Pliocene Kampungbaru Formation crops out in the easternmost part of the Lower Kutai Basin, Indonesia. The sedimentological analysis of seven outcrops was carried out, and a total of twenty-five samples from these outcrops was...

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Geosciences - ISSN 2076-3263