scholarly journals Interpretation of Mineralization in the Western Carpathians (Polish Segment)—A Tectonic Mélange Approach

Minerals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1171
Author(s):  
Katarzyna Jarmołowicz-Szulc ◽  
Leszek Jankowski
Keyword(s):  
General Trend ◽  
Sedimentary Rocks ◽  
Western Carpathians ◽  
Se Poland ◽  
Tectonic Window ◽  
Points Of View ◽  
Tectonic Mélange ◽  
Window Area ◽  
A Site ◽  
Different Parts

Quartz, carbonates and other minerals as e.g., realgar are present in veins and caverns in sedimentary rocks in the Western Carpathians. In the Polish segment, they have been characterized from the mineralogical, petrologic, and geochemical points of view, as well as fluid inclusions. Their characters are discussed from perspective of a description of particular types of chaotic complexes—the tectonic mélange zones, distinguished in the Western Carpathian area over the last two decades. The mélange zones are considered to be geochemical systems open to fluid flow, a site for mineral crystallization and/or migration zones of hydrocarbons and mineralized waters. In this context the tectonic mélange in the Jabłonki/Rabe vicinity (SE Poland, the Bieszczady region) in comparison to that of the Mszana Dolna tectonic window area are proposed as the examples. The trapping conditions of fluids (brine and methane) in the minerals in the mélange zones appear to have been 180–205 °C and ~550–570 bars, and 220 °C and 500 bars for calcite and quartz, respectively. The general trend of the increase in temperatures and pressures from west towards east and south-east in the mélange zones points to an increase in the degree of exhumation of different parts of the Carpathians.

THE ATMOSPHERIC POTENTIAL GRADIENT AT OTTAWA, CANADA

1937 ◽  
Vol 15a (8) ◽  
pp. 119-148 ◽  
Author(s):  
D. C. Rose
Keyword(s):  
Diurnal Variation ◽  
Potential Gradient ◽  
Meteorological Conditions ◽  
Fine Weather ◽  
Points Of View ◽  
Set Up ◽  
A Site

The atmospheric potential gradient was observed continuously at the National Research Laboratories at Ottawa for a year ending December 1, 1935, and at a country station about nine miles northwest of Ottawa, for four months ending November 1, 1936. The country station was set up on a site as free as possible from man-made pollution of the atmosphere. The records were studied from two points of view, the diurnal variation and disturbances in the normal fine weather value of the potential gradient. The results indicate that the diurnal variation is similar to that of other similarly situated stations. The study of disturbances in the potential gradient shows that all disturbances can be correlated with local meteorological conditions. The disturbances were for the most part associated with the stormy conditions usual at the passage of a front. The effect of city pollution on potential gradient records is clearly shown.

scholarly journals LOWER TRIASSIC VOLCANOGENIC FORMATIONS OF THE PRONCHISHCHEV RIDGE (NORTH OF CENTRAL SIBERIA)

2021 ◽  
Vol 2 (1) ◽  
pp. 201-206
Author(s):  
Aleksei Yu. Popov ◽  
Evgeny S. Sobolev ◽  
Artem Ya. Shevko ◽  
Andrei V. Yadrenkin
Keyword(s):  
Sedimentary Rocks ◽  
Spatial Relationship ◽  
Lower Triassic ◽  
Middle Part ◽  
Upper Permian ◽  
Central Siberia ◽  
Supply Channel ◽  
Single Complex ◽  
Geochemical Studies ◽  
Different Parts

The volcanogenic formations of the middle part of the Pronchishchev ridge are considered. Based on new data from the lithological, petrographic, geochemical studies of igneous and volcanogenic sedimentary rocks and stratigraphic studies of the Upper Permian-Lower Triassic terrigenous strata that enclose them, a model of their spatial relationship is proposed. It is shown that the dolerite body and the adjacent tuff breccia in the field of development of Upper Permian rocks as well as tuffite gravelites in the field of Lower Triassic rocks are a single complex of formations of different parts of the diatreme. The time of implantation of the diatreme is defined as the beginning of the Late Olenek. The wide development of vent facies dolerites in the diatreme may indicate the repeated activation of the supply channel.

scholarly journals Post-mining ponds in the Sandomierz Forest (SE Poland) as an important site for the conservation of a species-rich odonate assemblage

2021 ◽  
Author(s):  
Rafał Bobrek
Keyword(s):  
Redundancy Analysis ◽  
Habitat Conditions ◽  
Resident Species ◽  
Se Poland ◽  
Similarity Indices ◽  
High Species Richness ◽  
Special Concern ◽  
A Site ◽  
Unique Species ◽  
Important Site

In this study, the species composition and diversity of dragonfly and damselfly assemblages of six post-mining ponds differing in habitat conditions, located within a single sand pit in the central part of the Sandomierz Forest (SE Poland) were assessed. In total, 42 species were recorded in 2019, including 35 species considered resident to the site. In the six studied ponds, a range of 8 to 30 species were recorded, including 5 to 26 resident species. In each pond, at least one unique species was found, and one-third of all species were confined to single ponds only. As a result, the qualitative (Jaccard) and quantitative (Bray-Curtis) similarity indices between the pairs of ponds were low, reaching 12-61% and 19-53%, respectively. Thus, despite a lack of distinct barriers and negligible distances between the ponds (max. 350 m), the structure of assemblages in adjacent water bodies differed considerably. This is probably largely due to the habitat selectivity of species. A redundancy analysis (RDA) showed, that factors such as area and plant diversity of the pond were shaping odonate assemblages, explaining 49.1% of the total variance in the dataset. Due to the high species richness and the identification of several species of special concern, the studied sand pit should be considered a valuable secondary habitat for odonates, which – after termination of exploitation – should be regarded as a good candidate for a site designated for the conservation of biodiversity.

scholarly journals Neoproterozoic and post-Caledonian exhumation and shallow faulting in NW Finnmark from K/Ar dating and p/T analysis of fault-rocks

2018 ◽  
Author(s):  
Jean-Baptiste P. Koehl ◽  
Steffen G. Bergh ◽  
Klaus Wemmer
Keyword(s):  
Sedimentary Rocks ◽  
Fault Gouge ◽  
Fault Rocks ◽  
Northern Norway ◽  
Basement Rocks ◽  
Iapetus Ocean ◽  
Tectonic Window ◽  
Brittle Faulting ◽  
Early Neoproterozoic

Abstract. Well-preserved fault gouge along brittle faults in Paleoproterozoic, volcano-sedimentary rocks of the Raipas Group exposed in the Alta-Kvænangen tectonic window in northern Norway yielded latest Mesoproterozoic (ca. 1050 ± 15 Ma) to mid Neoproterozoic (ca. 825–810 ± 18 Ma) K/Ar ages. Pressure-temperature estimates from microtextural and mineralogy analyses of fault-rocks indicate that brittle faulting may have initiated at depth of 5–10 km during the opening of the Asgard Sea in the latest Mesoproterozoic-early Neoproterozoic (ca. 1050–945 Ma), and continued with a phase of shallow faulting during to the opening of the Iapetus Ocean-Ægir Sea and the initial breakup of Rodinia in the mid Neoproterozoic (ca. 825–810 Ma). The predominance and preservation of synkinematic smectite and subsidiary illite in cohesive and non-cohesive fault-rocks indicate that Paleoproterozoic basement rocks of the Alta-Kvænangen tectonic window remained at shallow crustal levels (

scholarly journals Origin and age of the Shenshan tectonic mélange in the Jiangshan-Shaoxing-Pingxiang Fault and late Early Paleozoic juxtaposition of the Yangtze Block and the West Cathaysia terrane, South China

2021 ◽  
Author(s):  
Lijun Wang ◽  
Kexin Zhang ◽  
Shoufa Lin ◽  
Weihong He ◽  
Leiming Yin
Keyword(s):  
South China ◽  
Strike Slip ◽  
Carbonaceous Shale ◽  
Early Paleozoic ◽  
Yangtze Block ◽  
The West ◽  
Northern Margin ◽  
The North ◽  
Tectonic Mélange ◽  
Different Parts

When and how the Yangtze Block (Yangtze) and the West Cathaysia terrane (West Cathaysia) in South China were amalgamated are critical to a better understanding of the Neoproterozoic to early Paleozoic tectonic evolution of South China and remain highly debatable. A key to this debate is the tectonic significance of the Jiangshan-Shaoxing-Pingxiang (JSP) Fault, the boundary between Yangtze and West Cathaysia. The Shenshan mélange along the JSP Fault has the typical block-in-matrix structure and is composed of numerous shear zone-bounded slivers/lenses of rocks of different types and ages that formed in different tectonic environments, including middle to late Tonian volcanic and volcanogenic sedimentary rocks (turbidite) of arc/back-arc affinity, a series of middle Tonian ultramafic to mafic plutonic rocks of oceanic island basalt affinity, a carbonaceous shale that was deposited in a deep marine environment, and a red mudstone. U-Pb zircon ages and acritarch assemblages (Leiosphaeridia-Brocholaminaria association) found in the turbidite confirm its Tonian age, and fossils from the carbonaceous shale (Asteridium-Comasphaeridium and Skiagia-Celtiberium-Leiofusa) constrains its age to the Early to Middle Cambrian. Field relationships and available age data leave no doubt that the ultramafic-mafic rocks are exotic blocks (rather than intrusions) in the younger metasedimentary rocks. We conclude that the Shenshan mélange is not an ophiolitic mélange, but rather a tectonic mélange that formed as a result of movement along the JSP Fault in the early Paleozoic. We suggest that Yangtze and West Cathaysia were two separate microcontinents, were accreted to two different parts of the northern margin of Gondwana in the early Early Paleozoic, and juxtaposed in the late Early Paleozoic through strike-slip movement along the JSP Fault. We further suggest that the ca. 820 Ma collision in the Jiangnan Orogen took place between Yangtze and a (micro)continent that is now partly preserved as the Huaiyu terrane and was not related to West Cathaysia. We compare our model for South China with the accretion of terranes in the North American Cordillera and propose a similar model for the relationship between the Avalon and Meguma terranes in the Canadian Appalachians, i.e., the two terranes were accreted to two different parts of the Laurentian margin and were later juxtaposed through margin-parallel strike slip faulting.

Ethnic uses of Makhana (Euryale ferox Salisb.) in Mithila (north Bihar) and other parts of India

2018 ◽  
Author(s):  
Anubha Kumari ◽  
Vidyanath Jha
Keyword(s):  
Northern India ◽  
Euryale Ferox ◽  
Ethnic Uses ◽  
Specific Association ◽  
A Site ◽  
Different Parts

The paper provides a report on the ethnic uses of Makhana (Euryale ferox Salisb.) in different parts of India including Mithila area of North Bihar that is known for being a site of its organized cultivation over centuries. In major parts of northern India E. ferox is available in wild or semi-wild forms. A survey on the ethnic uses of Makhana in Mithila and other parts of India has revealed its about a dozen distinct uses. These include its specific association with (i) ‘Kojaagaraa’ (a marital ritual) (ii) ‘Parikramaa’ (for maintaining counts during ritualistic circumambulation around a temple or tree) (iii) ‘Shraaddha Karma’ (last Hindu rites) (iv) Devotional offering to deities or distinguished persons in the form of non-flower garlands (v) ‘Prasaad’ (edible offering to deities) (vi) Sacred thread ‘Yajnopaveet’ as stiffening item (vii) ‘Makhaan Paagal’ i.e., caramelised pops (during Navratri and other festivals). It is used as a ‘Havan Saamagri’ and as a component of ‘Panchamevaa’ (i.e., five auspicious dry fruits). ‘Ghunes’, a head gear ceremonially worn by the bridegroom on the occasion of wedding has streams of Makhana pops hanging downward. This practice is observed by the Srotriyas in this area. The paper further incorporates its other traditional and modern uses mostly in the form of culinary preparations. These are also in practice in other areas of the country and abroad in the form of (i) 2 forms of snacks (ii) Dessert (iii) Sweetened Makhana (iv) Porridge (v) Dal Makhani (vi) Makhana Kofta and (vii) Makhana Dum Aloo.

The Ordovician volcanics of the Elmtree–Belledune inlier and their relationship to volcanics of the northern Miramichi Highlands, New Brunswick

1992 ◽  
Vol 29 (7) ◽  
pp. 1430-1447 ◽  
Author(s):  
J. A. Winchester ◽  
C. R. van Staal ◽  
J. P. Langton
Keyword(s):  
New Brunswick ◽  
Volcanic Rocks ◽  
Sedimentary Rocks ◽  
Late Ordovician ◽  
Igneous Rocks ◽  
Volcanic Arc ◽  
Middle Ordovician ◽  
Marginal Basin ◽  
Tectonic Mélange ◽  
Back Arc

An investigation of the geology and chemistry of the basic igneous rocks in the Elmtree and Belledune inliers in northern New Brunswick shows that the bulk of the Middle Ordovician rocks of the ophiolitic Fournier Group are best interpreted as the products of volcanism and sedimentation in an extensive ensimatic back-arc basin southeast of a volcanic arc. The oceanic back-arc-basin igneous rocks form the basement to renewed arc-related basaltic volcanism in late Middle to Late Ordovician time. The Fournier Group is separated from the structurally-underlying, shale-dominated Elmtree Formation of the Tetagouche Group by an extensive tectonic melange, which incorporates lenses of serpentinite, mafic volcanic rocks, and sedimentary rocks of both the Tetagouche and Fournier groups. The mafic volcanic rocks in the Elmtree Formation correlate best with those intercalated with the lithologically similar sediments of the Llandeilian–Caradocian Boucher Brook Formation in the northern Miramichi Highlands. The melange and the present structural amalgamation of the Tetagouche and Fournier groups result from closure of the marginal basin by northward-directed subduction at the end of the Ordovician. Most mafic suites in the Elmtree and Belledune inliers can be chemically correlated with similar suites in the northern Miramichi Highlands, showing that the two areas are not separated by a terrane boundary.

scholarly journals Microbial Geochemistry Reflecting Sulfur, Iron, Manganese, and Calcium Sources in the San Diego River Watershed, Southern California USA

Geosciences ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 495
Author(s):  
Eleanora Robbins ◽  
Shannon Quigley-Raymond ◽  
Ming Lai ◽  
Janae Fried
Keyword(s):  
San Diego ◽  
Sedimentary Rocks ◽  
River Watershed ◽  
Mn Oxide ◽  
Calcium Sources ◽  
High Sulfate ◽  
A Site ◽  
Iron Manganese ◽  
Mn Oxides ◽  
Iron And Manganese

Microbial populations involved in forming the distinctive precipitates of S, Fe, Mn, and Ca in the San Diego River watershed reflect an interplay between the mineralogy of the rocks in the watershed, sparse rainfall, ground- and surface-water anoxia, and runoff of high sulfate, treated imported water. In the sparsely developed headwaters, the Temescal Creek tributary emerges from pyrite-bearing metamorphic rocks, and thus exhibits both an oxidized Fe and reduced S. In the middle reaches, the river moves through developed land where treated, imported high sulfate Colorado River water enters from urban runoff. Mast Park surrounded by caliche-bearing sedimentary rocks is a site where marl is precipitating. Cobbles in riffles along the river are coated black with Mn oxide. When the river encounters deep-seated volcanic bedrock, it wells up to precipitate both Fe and Mn oxides at the Old Mission Dam. Then, directly flowing through caliche-laced sedimentary rocks, Birchcreek tributary precipitates tufa. Further downstream at a site under a bridge that blocks sunlight, a sulfuretum sets up when the river is deoxygenated. Such a rich geochemistry results in activity of iron and manganese oxidizing bacteria, sulfur oxidizers and reducers, and cyanobacteria precipitating calcareous marl and tufa.

The spatial distribution of Dactylogyrus amphibothrium on the gills of ruffe Gymnocephalus cernua and its relation to the relative amounts of water passing over the parts of the gills

1974 ◽  
Vol 48 (3) ◽  
pp. 167-174 ◽  
Author(s):  
R. Wootten
Keyword(s):  
Spatial Distribution ◽  
Anodonta Cygnea ◽  
Full Force ◽  
A Site ◽  
Different Parts

AbstractThe spatial distribution of the monogenean Dactylogyrus amphibothrium over the gill apparatus of the ruffe Gymnocephalus cernua was non-random, parasites being aggregated on certain areas of the gills. By plotting the distribution over the gills of the glochidia of Anodonta cygnea, the relative amounts of water passing over the different parts of the gill apparatus was determined experimentally. The observed distribution of D. amphibothrium was then compared with the distribution of the glochidia. The results obtained suggest that the site of attachment of D. amphibothrium is influenced at least in part by the direction and force of the respiratory current over the gills. Most parasites select a site where they are not subjected to its full force.

A Preliminary Investigation into the Effect of Outlier(s) on Singular Spectrum Analysis

2014 ◽  
Vol 13 (04) ◽  
pp. 1450029 ◽  
Author(s):  
Hossein Hassani ◽  
Rahim Mahmoudvand ◽  
Hardi Nabe Omer ◽  
Emmanuel Sirimal Silva
Keyword(s):  
Spectrum Analysis ◽  
Preliminary Investigation ◽  
Singular Spectrum Analysis ◽  
Real Data ◽  
Data Sets ◽  
Singular Spectrum ◽  
The Matrix ◽  
Points Of View ◽  
Different Parts

The aim of this paper is to study the effect of outliers on different parts of singular spectrum analysis (SSA) from both theoretical and practical points of view. The rank of the trajectory matrix, the magnitude of eigenvalues, reconstruction, and forecasting results are evaluated using simulated and real data sets. The performance of both recurrent and vector forecasting procedures are assessed in the presence of outliers. We find that the existence of outliers affect the rank of the matrix and increases the linear recurrent dimensions whilst also having a significant impact on SSA reconstruction and forecasting processes. There is also evidence to suggest that in the presence of outliers, the vector SSA forecasts are more robust in comparison to the recurrent SSA forecasts. These results indicate that the identification and removal of the outliers are mandatory to achieve optimal SSA decomposition and forecasting results.

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