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Geosciences, Volume 13, Issue 9

September 2023 - 33 articles

Cover Story:

Stable isotope compositions of Arctic paleoprecipitation are reported using phyllosilicates sampled from three paleosols and two bentonites in the Prince Creek Formation (Maastrichtian) in northern Alaska. Estimates of paleoprecipitation were calculated using mineralogical, elemental, and stable oxygen and hydrogen isotopic data recovered from the phyllosilicates. The resulting water isotope values do not intersect the Global Meteoric Water Line and show a deuterium excess ranging from 7 to 46 per mil. These results confirm the presence of a deuterium excess in Late Cretaceous Arctic paleoprecipitation and provide new insights to assessing possible explanations for this phenomenon, with implications for the mechanisms of Cretaceous polar warmth. View this paper

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Articles (33)

  • Article
  • Open Access
6 Citations
3,266 Views
24 Pages

13 September 2023

Advances in research on environmental problems and public awareness of them have led to renewed concern about the need to establish mechanisms and figures to protect and manage sites so that geoecological processes remain outside the dynamics of anth...

  • Article
  • Open Access
2,775 Views
32 Pages

Magnetic Fabric and Paleomagnetic Analyses of the Zaghar and Tafresh Areas, Central Urumieh-Dokhtar Magmatic Arc, Iran

  • Maryam Sheibi,
  • Nima Rahimi,
  • Pierre Rochette,
  • François Demory and
  • Hassan Mirnejad

12 September 2023

Magnetic fabric, paleomagnetic, and petrophysical studies were conducted on rocks in the Tafresh area of the central Urumieh-Dokhtar magmatic arc in Iran. The samples included Late Triassic dark gray sandstone, a mafic dyke, diorites, and a felsic dy...

  • Communication
  • Open Access
6 Citations
4,366 Views
14 Pages

12 September 2023

There are different ideas about the classification and distribution of permafrost in Mongolia. Terms such as continuous, discontinuous, sporadic, and isolated permafrost are inconsistently applied; hence, maps of permafrost display different distribu...

  • Article
  • Open Access
1 Citations
2,405 Views
15 Pages

10 September 2023

We report estimated stable isotope compositions of Artic paleoprecipitation using phyllosilicates sampled from three paleosols and two bentonites in the Prince Creek Formation (Maastrichtian) in northern Alaska. Previous studies reported a deuterium...

  • Brief Report
  • Open Access
2 Citations
2,452 Views
14 Pages

8 September 2023

This paper uses the displacement discontinuity method, one of the boundary element methods, to solve two major engineering problems. The first one addresses the safe design of underground excavations in fractured rock masses. The implemented method w...

  • Article
  • Open Access
2,351 Views
20 Pages

3D Body-Wave Velocity Structure of the Southern Aegean, Greece

  • Andreas Karakonstantis and
  • Filippos Vallianatos

7 September 2023

This study delves into the southern Aegean regionwhere the subduction of the oceanic Mediterranean lithosphere under the Aegean continental one takes place. This region is considered one of the most active ones in the eastern Mediterranean Sea due to...

  • Article
  • Open Access
6 Citations
1,930 Views
18 Pages

Expected Changes in Rainfall-Induced Landslide Activity in an Italian Archaeological Area

  • Evelina Volpe,
  • Stefano Luigi Gariano,
  • Luca Ciabatta,
  • Yaser Peiro and
  • Elisabetta Cattoni

7 September 2023

Cultural heritage is one of the most exceptional resources characterizing the Italian territory. Archaeological heritage, i.e., the archaeological sites with different types of archaeological artifacts, strongly contributes to enriching the national...

  • Article
  • Open Access
1 Citations
2,889 Views
30 Pages

Identifying Probable Submarine Hydrothermal Spots in North Santorini Caldera Using the Generalized Moments Method

  • Ana Dura,
  • Paraskevi Nomikou,
  • Theo J. Mertzimekis,
  • Mark D. Hannington,
  • Sven Petersen and
  • Serafim Poulos

6 September 2023

The presence of active hydrothermal vent fields near residential areas and their possible link to volcanic activity poses a potential hazard to the environment, society, and the economy. By capitalizing on Autonomous Underwater Vehicle sampling metho...

  • Article
  • Open Access
6 Citations
2,702 Views
31 Pages

4 September 2023

This study reports a fractal analysis of one-year radon in groundwater disturbances from five stations in China amidst the catastrophic Wenchuan (Mw = 7.9) earthquake of 12 May 2008 (day 133). Five techniques are used (DFA, fractal dimensions with Hi...

  • Article
  • Open Access
10 Citations
3,950 Views
18 Pages

3 September 2023

We utilized the random forest (RF) machine learning algorithm, along with nine topographical/morphological factors, namely aspect, slope, geomorphons, plan curvature, profile curvature, terrain roughness index, surface texture, topographic wetness in...

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Geosciences - ISSN 2076-3263