Missing Aragonitic Biota and the Diagenetic Evolution of Heterozoan Carbonates: A Case Study from the Oligo-Miocene of the Central Mediterranean

2006 ◽  
Vol 76 (5) ◽  
pp. 871-888 ◽  
Author(s):  
A. C. Knoerich ◽  
M. Mutti
Keyword(s):  
Central Mediterranean ◽  
Heterozoan Carbonates ◽  
Diagenetic Evolution

Linking surface hydrodynamics to planktonic ecosystem: the case study of the ichthyoplanktonic assemblages in the Central Mediterranean Sea

Hydrobiologia ◽  
2017 ◽  
Vol 821 (1) ◽  
pp. 191-214 ◽  
Author(s):  
Angela Cuttitta ◽  
Marco Torri ◽  
Rafik Zarrad ◽  
Salem Zgozi ◽  
Othman Jarboui ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Central Mediterranean ◽  
Central Mediterranean Sea

scholarly journals Protection reveals density-dependent dynamics in fish populations: A case study in the central Mediterranean

PLoS ONE ◽  
2020 ◽  
Vol 15 (2) ◽  
pp. e0228604
Author(s):  
Paco Melià ◽  
Renato Casagrandi ◽  
Antonio Di Franco ◽  
Paolo Guidetti ◽  
Marino Gatto
Keyword(s):  
Fish Populations ◽  
Central Mediterranean ◽  
Density Dependent

scholarly journals Diagenetic Heterogeneity of Deep Sandstones and Its Relationship to Oil Emplacement: A Case Study from the Middle Jurassic Toutunhe Formation in the Fukang Sag, Central Junggar Basin (NW China)

Geofluids ◽  
2017 ◽  
Vol 2017 ◽  
pp. 1-23 ◽  
Author(s):  
Binfeng Cao ◽  
Xiaorong Luo ◽  
Likuan Zhang ◽  
Fenggui Sui ◽  
Huixi Lin ◽  
...  
Keyword(s):  
Middle Jurassic ◽  
Junggar Basin ◽  
Reservoir Properties ◽  
Nw China ◽  
Fine Grained ◽  
Reservoir Sandstones ◽  
Deep Reservoir ◽  
Calcite Cement ◽  
Diagenetic Evolution

The Middle Jurassic Toutunhe Formation at depths of approximately 4000–6000 m has increasingly come into focus as a current deep reservoir target in the central Junggar Basin (NW China). Based on petrography, SEM, stable isotopes, and fluid inclusion analyses, the goals of this study were to investigate the effect of depositional lithofacies on sandstone diagenetic heterogeneity and to examine the relationship between diagenetic evolution and oil charge within a heterogeneous reservoir. Grain size controls the overall abundance of cement and porosity and reservoir properties through its effect on ductile lithic sand grains and hence on mechanical compaction. Early diagenetic calcite cement is an exception to this trend. Ductile lithic-rich, very fine-grained sandstones featured compaction of easily deformed, clay-rich grains, resulting in a very rapid loss of porosity during burial. In contrast, dissolution and cementation occurred as well as ductile compaction in the fine-grained sandstones. Two episodes of oil charge occurred in the relatively coarser-grained sandstone lithofacies. Diagenesis progressed alternately with oil emplacement, and some diagenetic alterations and oil charge occurred simultaneously. Ductile lithic-rich, highly compacted sandstones and tightly calcite-cemented sandstones can create permeability barriers embedded in permeable reservoir sandstones, probably resulting in heterogeneous flow.

scholarly journals Stick to the plan? Culture, interests, multidimensional threats, and Italian defence policy

2017 ◽  
Vol 47 (2) ◽  
pp. 183-203 ◽  
Author(s):  
Michela Ceccorulli ◽  
Fabrizio Coticchia
Keyword(s):  
Armed Forces ◽  
Industrial Complex ◽  
Security Threats ◽  
Central Mediterranean ◽  
International Context ◽  
Military Industrial Complex ◽  
National Debate ◽  
The Military

The international context seems to be increasingly exposed to multidimensional and transnational challenges, ranging from irregular migration and piracy to the violation of basic human rights. Rather than excluding a potential role for the military, many European states rely on it to face a complex security scenario. What are the reasons behind this activism? Taking Italy as a case study, this article works out two main arguments (ideational factors and interests relating to the so-called military–industrial complex) and tries to intercept their weight in the national debate leading to the decision to intervene militarily (or not) in Sri Lanka (2004–05), Haiti (2010), and in the Central Mediterranean (2015–). Ultimately, this effort contributes to understanding the role of the military instrument in Italy, a state particularly exposed to the new challenges ahead, and offers tools for research to be potentially applied in other countries that make similar use of armed forces to deal with non-conventional security threats.

scholarly journals Coupling between tectonic activity and diagenetic evolution of a clastic buried hill—a case study from Gubei low buried hill in Jiyang Depression of Bohai Bay Basin

2021 ◽  
Vol 14 (3) ◽  
Author(s):  
Yelei Wang ◽  
Longwei Qiu ◽  
Yongqiang Yang ◽  
Wenhao Xu ◽  
Danish Khan ◽  
...  
Keyword(s):  
Tectonic Activity ◽  
Bohai Bay ◽  
Tight Sandstone ◽  
Near Surface ◽  
Jiyang Depression ◽  
Sandstone Reservoirs ◽  
Diagenetic Evolution ◽  
Buried Hill ◽  
Low Permeability Reservoirs

AbstractThis paper aims to gain new insights into clastic buried hill reservoirs. For this purpose, the Permian sandstone reservoirs in the Upper Shihezi Formation, Gubei low buried hill, Jiyang Depression, was taken as the object. Referring to the evolution histories of reservoirs and tectonics, the diagenesis of the reservoirs and its coupling with tectonic activity were investigated, with the aid of techniques like core observation, casting sheet observation, scanning electron microscopy (SEM), cathode luminescence, electron probe, back scattering, fluid inclusion, and pore permeability tests. The results show that the Permian sandstone reservoirs in the Upper Shihezi Formation, Gubei low buried hill, Jiyang Depression, are low-porosity, low-permeability reservoirs with complex diagenesis. The diagenetic evolution sequence can be summarized as early feldspar corrosion/kaolinite cemention/early pyrite cemention→carbonate cemention/secondary enlargement of quartz→quartz corrosion/corrosion of quartz and its secondary enlargement→late calcite cemention→late pyrite cemention/carbonate corrosion/late feldspar corrosion/corrosion of dissolvable miscellaneous matrix; compaction effect exists throughout the evolution process. The reservoirs went through (I) shallow burial epidiagenesis, (II) near-surface hydrothermal diagenesis, (III) deep burial alkaline diagenesis, and (IV) continuous burial acid diagenesis. The diagenetic evolution of these four stages is significantly affected by tectonic activities, and the article lists the evidence that diagenesis is affected by tectonic activity. The research results lay the basis for the prediction and evaluation of the Permian sandstone reservoirs in the Upper Shihezi Formation, Gubei low buried hill, Jiyang Depression, and shed new light on the exploration of tight sandstone reservoirs.

Combined rock-magnetic and colorimetric stratigraphy for a 430 ka- covering loess-palaeosol sequence in the vicinity of Belgrade, Northern Serbia

2020 ◽  
Author(s):  
Christian Laag ◽  
Ulrich Hambach ◽  
Christian Zeeden ◽  
Mladjen Jovanović ◽  
Slobodan Marković
Keyword(s):  
Central Italy ◽  
Central Mediterranean ◽  
Danube Basin ◽  
Climate History ◽  
Oxygen Isotope Stage ◽  
Magnetic Parameters ◽  
Stratigraphic Model ◽  
Early Humans ◽  
Anchor Points

<p>Quaternary palaeoenvironmental recorders are particularly in the Northern Hemisphere provided by loess-palaeosol sequences (LPSs). In the Middle Danube basin, these terrestrial archives cover the last million years (Markovic et al., 2015) of the climate history as well as archaeological horizons from occupations by early humans. The Zemun loess site (ZLS, located in the Vojvodina, Northern Serbia) was declared as a protected site, based on artefacts of previous settlements found on the river bench. For providing a stratigraphy for this site and to set the archaeological findings into an environmental and temporal context, the ZLS was investigated by means of environmental magnetic and colorimetric properties. This requires not only to creation of a stratigraphy to be compared to already investigated sites of northern Serbia, but also provides independent age control, carried out by tephrochronology. Therefore, the ZLS contains two important chronological anchor-points, namely the L2-tephra (correlated to Vico Ignimbrite B and dated to 160.6 ± 4 ka, (Mannella et al., 2019)) and the Bag-Tephra (correlated to the Villa Senni eruption and dated to 351-357 ka (Fu et al., 2019)). This tephrochronological timeframe, in combination with the colorimetric and environmental magnetic parameters, witnesses an accumulation of mineral dust, providing insights from glacial to interglacial conditions ranging from marine oxygen isotope stage (MIS) 11 to MIS 4.</p><p> </p><p><strong>References</strong></p><p>Fu et al. (2019): Chances and challenges in tephrochronology of loess: A case study from the Bag tephra in Serbia. Poster at the XX. INQUA International Quaternary Association Conference 25 – 31 July, Dublin, Ireland.</p><p>Mannella et al. (2019): Palaeoenvironmental and palaeohydrological variability of mointain areas in the central Mediterranean region: A 190 ka-long chronicle from the independently dated Fucino palaeolake record (central Italy). Qua. Sci Rev., 210, pp. 190-210.</p><p>Markovic et al. (2015): Danube loess stratigraphy – Towards a pan-European loess stratigraphic model. Earth-Sci. Rev., 148, pp. 228-258.</p>

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