Tectonics and gravitational phenomena (Nanos, Slovenia)

The Istra Pushed Area is a specifically deformed territory of the northwestern part of the External Dinarides. It formed due to the movement of the Istra block as part of the Adriatic Microplate (Adria) towards the Dinarides since the middle Miocene. The movement of the Istra block caused hereditary shifts along the old dislocations dating back to the early formation stage of the formation of the Dinarides at the end of the Eocene and their deformation. These deformations are reflected also in certain extreme gravitational phenomena along the boundary between the External Dinaric Imbricated Belt and the External Dinaric Thrust Belt, where Mesozoic carbonates are thrusted upon the Cenozoic flysch. The boundary zone between these two belts connects the Trnovo, Hrušica and Snežnik Thrust Fronts. Four specific gravitational phenomena that occurred in this boundary zone are presented here, as they are remarkable in terms of their size: Črna griža (Trnovo Nappe), Suhi vrh (Hrušica Nappe), Petelinje mlake and Ilirska Bistrica (both from the Snežnik Nappe). The phenomena at Suhi vrh is described in detail herein.

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3-D Geothermal Model of the Lurestan Sector of the Zagros Thrust Belt, Iran

Energies ◽

10.3390/en13092140 ◽

2020 ◽

Vol 13 (9) ◽

pp. 2140 ◽

Cited By ~ 3

Author(s):

Matteo Basilici ◽

Stefano Mazzoli ◽

Antonella Megna ◽

Stefano Santini ◽

Stefano Tavani

Keyword(s):

Structural Model ◽

Thermal Structure ◽

Frictional Heating ◽

Analytical Calculation ◽

Geothermal Gradient ◽

Hydrocarbon Exploration ◽

Flow Density ◽

Northwestern Part ◽

Thrust Belt ◽

Analytical Methodology

The Zagros thrust belt is a large orogenic zone located along the southwest region of Iran. To obtain a better knowledge of this important mountain chain, we elaborated the first 3-D model reproducing the thermal structure of its northwestern part, i.e., the Lurestan arc. This study is based on a 3-D structural model obtained using published geological sections and available information on the depth of the Moho discontinuity. The analytical calculation procedure took into account the temperature variation due to: (1) The re-equilibrated conductive state after thrusting, (2) frictional heating, (3) heat flow density data, and (4) a series of geologically derived constraints. Both geotherms and isotherms were obtained using this analytical methodology. The results pointed out the fundamental control exerted by the main basement fault of the region, i.e., the Main Frontal Thrust (MFT), in governing the thermal structure of the crust, the main parameter being represented by the amount of basement thickening produced by thrusting. This is manifested by more densely spaced isotherms moving from the southwestern foreland toward the inner parts of orogen, as well as in a lateral variation related with an along-strike change from a moderately dipping crustal ramp of the MFT to the NW to a gently dipping crustal ramp to the SE. The complex structural architecture, largely associated with late-stage (Pliocene) thick-skinned thrusting, results in a zone of relatively high geothermal gradient in the easternmost part of the study area. Our thermal model of a large crustal volume, besides providing new insights into the geodynamic processes affecting a major salient of the Zagros thrust belt, may have important implications for seismotectonic analysis in an area recently affected by a Mw = 7.3 earthquake, as well as for geothermal/hydrocarbon exploration in the highly perspective Lurestan region.

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Quantitative investigation of the formation and growth of palladium fractal nanocrystals by liquid-cell transmission electron microscopy

Chemical Communications ◽

10.1039/c9cc03161h ◽

2019 ◽

Vol 55 (56) ◽

pp. 8186-8189 ◽

Cited By ~ 2

Author(s):

Biao Jin ◽

Zhaoming Liu ◽

Ruikang Tang ◽

Chuanhong Jin

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Growth Dynamics ◽

Quantitative Investigation ◽

Formation Stage ◽

Early Formation ◽

Transmission Electron ◽

Cell Transmission ◽

Liquid Cell

Liquid-cell transmission electron microscopy reveals the early formation stage of fractal nanocrystals and the effects of supersaturation on their growth dynamics.

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Middle Miocene–Early Pliocene wedge-top basins of NW Sicily (Italy): constraints for the tectonic evolution of a ‘non-conventional’ thrust belt, affected by transpression

Journal of the Geological Society ◽

10.1144/jgs2013-009 ◽

2014 ◽

Vol 171 (2) ◽

pp. 211-226 ◽

Cited By ~ 11

Author(s):

C. Gugliotta ◽

M. Gasparo Morticelli ◽

G. Avellone ◽

M. Agate ◽

M. R. Barchi ◽

...

Keyword(s):

Tectonic Evolution ◽

Middle Miocene ◽

Thrust Belt ◽

Early Pliocene

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Retraction: Middle Miocene to Early Pliocene Contraction in the Chos Malal Fold-and-Thrust Belt (Neuquén Basin, Argentina): Insights from Structural Analysis and Apatite Fission-Tracks Thermochronology

Tectonics ◽

10.1002/tect.20689 ◽

2017 ◽

Vol 36 (12) ◽

pp. 3333-3333

Author(s):

N. Sánchez ◽

I. Coutand ◽

M. Turienzo ◽

F. Lebinson ◽

V. Araujo ◽

...

Keyword(s):

Structural Analysis ◽

Middle Miocene ◽

Thrust Belt ◽

Fission Tracks ◽

Early Pliocene ◽

Fold And Thrust Belt ◽

Neuquen Basin ◽

Neuquén Basin

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Spectroscopic investigation of the early formation stage of the Si(111)(2 × 1)-Mo interface

Surface Science ◽

10.1016/0039-6028(86)90248-7 ◽

1986 ◽

Vol 177 (1) ◽

pp. L901-L906 ◽

Cited By ~ 11

Author(s):

I. Abbati ◽

L. Braicovich ◽

B. De Michelis ◽

A. Fasana ◽

A. Rizzi

Keyword(s):

Spectroscopic Investigation ◽

Formation Stage ◽

Early Formation

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VOLCANISM OF THE EARLY FORMATION STAGE OF ITURUP ISLAND (GREAT KURILE CHAIN)

Bulletin of Kamchatka Regional Association «Educational-Scientific Center» Earth Sciences ◽

10.31431/1816-5524-2021-1-49-87-98 ◽

2021 ◽

pp. 87-98

Author(s):

P.I. Fedorov ◽

◽

N.V. Tsukanov ◽

A.R. Geptner ◽

V.V. Petrova ◽

...

Keyword(s):

Low Temperature ◽

Field Strength ◽

Partial Melting ◽

Upper Mantle ◽

High Field ◽

Middle Miocene ◽

Volcanic Rocks ◽

High Field Strength ◽

Iturup Island ◽

Formation Stage

The article presents new petrogeochemical data on the Middle Miocene-Pliocene volcanic rocks from central part of Iturup Island (Great Kurile Chain). It is shown that volcanism of the Middle Miocene-Early Pliocene age in the central part of the Iturup Island took place in a suprasubduction setting. The distribution of high field strength elements (HFSE) and their ratio in the basaltoids indicate their formation upon partial melting of the depleted upper mantle, while the enrichment of rocks with large ionic lithophilic elements (LILE) indicates both a fluid mantle additive introduced into the melts during the evolution of primary magma and the participation of a low-temperature suprasubduction fluid. The established differences in the composition of the basaltoids of the frontal and rear zones due to the limited number of analyzed samples are considered preliminary. Thus, basaltoids in the rear zone are distinguished by higher concentrations of Th, Pb, HFSE (Nb, Zr, Y, Hf), relative enrichment in LREE, pronounced negative Zr and Hf anomalies, and positive Eu.

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Foraminiferal biostratigraphy of the post mid-Miocene in two boreholes in the Danish North Sea

Danmarks Geologiske Undersøgelse Serie C ◽

10.34194/seriec.v12.7112 ◽

1995 ◽

Vol 12 ◽

pp. 101-111

Author(s):

Peter B Konradi

Keyword(s):

North Sea ◽

Water Depth ◽

Middle Miocene ◽

Middle Pleistocene ◽

Northwestern Part ◽

Stratigraphic Subdivision ◽

Central Trough ◽

The Subject ◽

Depth Zonation ◽

Foraminiferal Biostratigraphy

Cutting samples from two exploration wells, Cleo-1 and Kim-1, in the Central Trough area in the northwestern part of the Danish North Sea, have been investigated for foraminiferal content in the section above the prominent mid-Miocene event. Benthonic foraminifera have been used to produce a stratigraphic subdivision by reference to the standard NSB zonation of King. The NSB 12 to NSB 17 zones (Middle Miocene to Middle Pleistocene) have been identified above the event. These zones can be related to the paleo water depth zonation. Paleoenvironrnental reconstruction shows that sediments from the subject interval from Cleo-1 were deposited in a shallower situation than equivalent deposits in Kim-1. A conspicuous hiatus is identified in Cleo-1 at the Pliocene-Pleistocene boundary.

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Effects of brief sodium fluoride treatment on the growth of early and mature cariogenic biofilms

10.21203/rs.3.rs-586115/v1 ◽

2021 ◽

Author(s):

Ye Han

Keyword(s):

Sodium Fluoride ◽

Biofilm Formation ◽

Water Soluble ◽

Laser Scanning Microscopy ◽

Extracellular Polysaccharides ◽

Antibiofilm Activity ◽

Fluoride Treatment ◽

Formation Stage ◽

Early Formation ◽

Cariogenic Biofilm

Abstract Although fluoride has been widely used in the prevention of dental caries, the effect of fluoride on the activity of biofilm in different stages of cariogenic biofilm formation is less studied. This study aimed to investigate the antibiofilm activity of sodium fluoride during early and mature Streptococcus mutans (S. mutans) biofilms formation. S. mutans biofilms were formed on saliva-coated hydroxyapatite disks. In the early (0 ~ 46 h) and mature (46 ~ 94 h) biofilm stages, the biofilm was treated with different concentrations of fluoride (250, 500, 1000, 2000 ppm; 5 times in total, 1 min/treatment). Acidogenicity, dry weight, colony-forming units, water-soluble/insoluble extracellular polysaccharides (EPS), and intracellular polysaccharides were analyzed and confocal laser scanning microscopy images were obtained of the two stages of biofilms (early and mature biofilms). To determine the antibiofilm activity of sodium fluoride during the formation of early and mature biofilms, and to evaluate the relationship between different concentrations of sodium fluoride and antibiofilm activity. In the early cariogenic biofilm formation stage, all fluoride concentration test groups (250, 500, 1000, 2000 ppm) significantly inhibited the growth of S. mutans biofilm. The antibiofilm and anti-EPS formation activities of the brief fluoride treatment increased in a concentration-dependent pattern. At the mature biofilm stage, only the 2000 ppm fluoride treatment group significantly inhibited biofilm accumulation, activity, and intracellular/extracellular polysaccharide content compared with the control and other fluoride treatment groups. The antimicrobial activity of fluoride is related to the formation stage of cariogenic biofilm. The early formation stage of cariogenic biofilm is more susceptible to the inhibition of fluorine than the mature stage. The fluoride treatment in the early formation stage of cariogenic biofilm may be an effective means to control the development of cariogenic biofilm and prevent caries.

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