Early Bashkirian Rugosa (Anthozoa) from the Donets Basin, Ukraine. Part 1. Introductory considerations and the genus Rotiphyllum Hudson, 1942
FEDOROWSKI J.
Institute of Geology, Adam Mickiewicz University, Makow Polnych 16, PL-61-606 Poznan, Poland.
jerzy@amu.edu.pl
ABSTRACT: The present paper is the first in a series devoted to the Early Bashkirian Rugosa (Anthozoa) from the Donets Basin.
The history of investigation and current status of Early Bashkirian stratigraphy is discussed in the context of the
Donets Basin strata. Corals of that time interval are extremely rare worldwide and those from the Donets Basin
have never been described in detail. Four of the five species described are new: Rotiphyllum asymmetricum sp.
nov., R. latithecatum sp. nov., R. simulatum sp. nov., and R. voznesenkae sp. nov. Two species are left in open
nomenclature. The synonymy, species content and critical review of species potentially belonging to the genus
Rotiphyllum are reviewed.
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A second camel spider (Arachnida: Solifugae) from Baltic amber
DUNLOP J. A.1, KLANN A. E.2
1Polish Geological Institute, Rakowiecka 4, PL-00-975 Warszawa, Poland.
jason.dunlop@mfn-berlin.de
2Polish Geological Institute, Rakowiecka 4, PL-00-975 Warszawa, Poland.
anja.klann@uni-greifswald.de
ABSTRACT: Fossil camel spiders (Arachnida: Solifugae) are extremely rare and only the second example ever recovered from
Baltic amber (Paleogene: Eocene) is described here.Although superficially well preserved and more than twice
the size of the previously known Baltic amber specimen, key taxonomic characters allowing meaningful comparisons
to the other fossil and living material cannot, unfortunately, be resolved. It is formally treated here as
Solifugae gen. et sp. indet., although we concede that it could be an adult of the previously recorded Baltic amber
species Palaeoblossia groehni Dunlop, Wunderlich and Poinar, 2004.
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Sedimentary environments of the Neogene basins associated with the Cao Bang - Tien Yen Fault, NE Vietnam
WYSOCKA A.
Faculty of Geology, University of Warsaw, Al. Zwirki i Wigury 93, PL-02-089 Warszawa, Poland.
anna.wysocka@uw.edu.pl
ABSTRACT: The Na Duong, That Khe and Cao Bang sedimentary basins associated with the Cao Bang - TienYen Fault (northern
Vietnam) developed in the zone subparallel (distance ca. 150 km NW) to the major strike-slip Red River Fault
Zone that separates the South China and the Indochina terranes. These fault-controlled basins are filled with thick
series of Neogene terrestrial deposits. Thirteen sedimentary lithofacies were distinguished and grouped into facies
associations to represent seven depositional environments, as follows: alluvial fans, gravel-dominated fluvial channels,
sand-dominated fluvial channels, flood plains, lake margins and/or river mouths, lakes, and swamps. The facies
association pattern, different in each of the investigated basins, is interpreted as a coal-bearing fluvial to lacustrine
environment for the Na Duong Basin, and a fluvial environment for the That Khe Basin. The most complex
pattern is displayed by the Cao Bang Basin and interpreted as an alluvial-fan to lacustrine environment. The origin
of theses basins may be correlated with a sinistral transtensional regime which occurred in the Early to Middle
Miocene. Besides tectonic activity, the evolution of particular basinswas also controlled by the climate,which caused
a change in the rate of sediment supply and weathering conditions. The present-day shape of these basins does not
correspond to their original plan, having resulted from the post-sedimentary uplift and erosion.
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Late Eocene to Quaternary deformation and stress field evolution of the Orava region (Western Carpathians)
PESKOVA I.1, VOJTKO R.1, STAREK D.2, SLIVA L.1
1Department of Geology and Paleontology, Faculty of Natural Sciences, Comenius University, Mlynska dolina, pav. G, 842 15 Bratislava, Slovakia.
vojtko@fns.uniba.sk
peskova@fns.uniba.sk
sliva@fns.uniba.sk
2Faculty of Geology, Warsaw University, Zwirki i Wigury 93, PL-02-089 Warszawa, Poland.
dusan.starek@savba.sk
ABSTRACT: The northern part of theWestern Carpathians suffered polyphase deformation at the boundary between their Central
and Outer parts. Palaeostress analysis in the Orava region revealed the existence of five different stress fields
in the period from the Late Eocene to the Quaternary. The evolution of the stress fields was determined by detailed
structural analysis of the fault slip and fold orientation data. The orientation of the stress fields shows an
apparent clockwise rotation from the Late Eocene to the Quaternary. During the Late Eocene to Oligocene, E-W compression and perpendicular tension affected this area. This was the time when the Central Carpathian
Palaeogene Basin formed.After this compression, the palaeostress field rotated approximately 40-50°, and NW-
SE compression and NE-SW tension took place in the EarlyMiocene. TheMiddleMiocene to Pliocene was characterised
by progressive rotation of the palaeostress field from NW-SE to the NE-SW direction of the maximum
principal compressional stress axis (δ1). This clockwise rotation of the Oligocene to Quaternary palaeostress
fields here is explained by the effect of the counterclockwise rotation of theALCAPAmicroplate, and by the regional
stress field changes in this region. The Quaternary stress field was reconstructed on the basis of structural
measurements in the Pliocene sedimentary formations of the Orava-Nowy Targ Basin. The results of the
palaeostress analysis show that the Quaternary stress field is characterised by E-W-oriented Sh (minimum horizontal
compression) and N-S-oriented SH (maximum horizontal compression).
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The comparison of alteration zones in the Sungun porphyry copper deposit, Iran (based on fluid inclusion studies)
ASGHARI O.M1, HEZARKHANI A.2, SOLTANI F.3
1Department of mining engineering, University of Kashan, Kashan, Iran.
O.asghari@aut.ac.ir
2Department of Mining and Metallurgy Engineering, Amirkabir University of Technology, Tehran, P.O.Box 45875-4413,424 Hafez Ave., Tehran, Iran.
ardehez@aut.ac.ir
3Department of Mining and Metallurgy Engineering, Amirkabir University of Technology, Tehran, Iran.
Zohrehs61@yahoo.com
ABSTRACT: The Sungun porphyry copper deposit (PCD) is located in EastAzarbaijan, in northwestern Iran. The felsic rocks occur
as stocks and dykes ranging in composition fromquartzmonzodiorite through quartzmonzonite. The stocks are
classified into porphyry stocks I and II. Porphyry stock II, hosting the copper ore, experienced an intense hydro-fracturing
leading to the formation of stockwork-type veinlets and micro-veinlets of quartz, sulphides, carbonates and
sulphates. Three distinct types of hydrothermal alteration and sulphide mineralization are recognized at Sungun (1)
hypogene, (2) contactmetasomatic (skarn), and (3) supergene.Hypogene alteration is developed in four kinds: potassic,
phyllic, propylitic and argillic. Three types of fluid inclusions are typically observed at Sungun: (1) vapour-rich,
two-phase, (2) liquid-rich two-phase and (3)multi-phase.Halite is the principal solid phase inmultiphase inclusions.
Primary multiphase inclusions (LVH type fluid inclusions) within the quartz crystals in quartz-sulphide and quartzmolybdenite
veinlets (quartz associated with sulphideminerals) were selected formicro-thermometric analyses and
considered to be suitable for pressure calculations and estimation of hydrothermal fluid density.Homogenization temperature,
salinity, pressure and density were measured and calculated in forty-seven selected samples
None of the variables could distinguish the potassic from phyllic alteration zones clearly. In the potassic alteration
zone, the average of homogenization temperature is about 413°C, while in the phyllic alteration zone
i;ts average is about 375 °C. It was expected that the temperature in the potassic alteration zone would be higher
than that in the phyllic zone, but the difference found was not very significant The fluid inclusion salinity within
both alteration zones obviously relates to their homogenization temperature: the average salinity in the samples
from the potassic zone is 46.3 (wt%NaCl equiv.), which is higher than that in the samples from the phyllic zone..
Based on the estimated depth of the potassic alteration domain, it is expected that the lithostatic pressure was
higher than in the phyllic alteration zone.According to the fluid inclusion studies and pressure calculation, it is
estimated that the average pressure for the potassic alteration zone was about 512 (bars) while the average pressure
for phyllic zone was about 310 (bars). The average density of fluids in the samples from the potassic alteration
zone is 1.124 (g/cm3), which is higher than that in the phyllic alteration zone (1.083 g/cm3).
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δ18O and δ13C isotope investigation of the Late Glacial and early Holocene biogenic carbonates from the Lake Lednica sediments, western Poland
APOLINARSKA K.
Institute of Geology, Adam Mickiewicz University, Makow Polnych 16, PL-61-606 Poznan, Poland.
karinaap@amu.edu.pl
ABSTRACT: Stable isotope composition (δ18O and δ13C) of biogenic carbonates derived from the Lake Lednica sediments at
Rybitwy, western Poland, was applied to obtain data on climatic changes during the Late Glacial and early
Holocene. A wide range of carbonates occurring in the sediments was analysed for δ18O and δ13C records, including
shells of several gastropod species, the bivalve genus Pisidium and carapaces of ostracods belonging to
the subfamily Candoninae.
The δ18O and δ13C records reveal changes commonly observed for the Late Glacial and early Holocene with
the exception of the low oxygen isotope values of the Bölling andAlleröd Interstadials. The latter is interpreted
as a consequence of 18O-depletion of the lake water resulting from gradual melting of the dead ice that still filled
the deepest parts of the Lake Lednica valley during the period described. TheYounger Dryas Stadial begins with
the isotopically lightest values in the sequence; however, due to the 18O-depleted values of theAlleröd Interstadial
the Alleröd/Younger Dryas boundary is poorly marked. The Younger Dryas/Preboreal transition is documented
by a significant shift in δ18O values of about 2-3‰, resulting from an increase in the mean annual temperature.
The δ13C record reflects the productivity level in the lake, with 13C-enriched carbonates during the Bolling
andAlleröd Interstadials, and the Preboreal and Boreal, when photosynthetic activity of phytoplankton and macrophytes
was the most intensive.
Differences in δ18O and δ13C values between mollusc shells and ostracod carapaces reflect the specific season
and subhabitat of each carbonate secretion.
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