scholarly journals Coiling direction in Middle Miocene globorotaliids (Foraminiferida) – a case study in the Paratethys (Upper Silesia Basin, Poland)

2018 ◽  
Author(s):  
Małgorzata GONERA
Keyword(s):  
Middle Miocene ◽  
Upper Silesia ◽  
Coiling Direction

scholarly journals A perspective on crassulacean acid metabolism photosynthesis evolution of orchids on different continents: Dendrobium as a case study

2019 ◽  
Vol 70 (22) ◽  
pp. 6611-6619
Author(s):  
Ming-He Li ◽  
Ding-Kun Liu ◽  
Guo-Qiang Zhang ◽  
Hua Deng ◽  
Xiong-De Tu ◽  
...  
Keyword(s):  
Crassulacean Acid Metabolism ◽  
Middle Miocene ◽  
Acid Metabolism ◽  
Flowering Plants ◽  
Asian Clade ◽  
Wide Range ◽  
Cam Species ◽  
Climatic Cooling ◽  
Cam Photosynthesis

Abstract Members of the Orchidaceae, one of the largest families of flowering plants, evolved the crassulacean acid metabolism (CAM) photosynthesis strategy. It is thought that CAM triggers adaptive radiation into new niche spaces, yet very little is known about its origin and diversification on different continents. Here, we assess the prevalence of CAM in Dendrobium, which is one of the largest genera of flowering plants and found in a wide range of environments, from the high altitudes of the Himalayas to relatively arid habitats in Australia. Based on phylogenetic time trees, we estimated that CAM, as determined by δ 13C values less negative than –20.0‰, evolved independently at least eight times in Dendrobium. The oldest lineage appeared in the Asian clade during the middle Miocene, indicating the origin of CAM was associated with a pronounced climatic cooling that followed a period of aridity. Divergence of the four CAM lineages in the Asian clade appeared to be earlier than divergence of those in the Australasian clade. However, CAM species in the Asian clade are much less diverse (25.6%) than those in the Australasian clade (57.9%). These findings shed new light on CAM evolutionary history and the aridity levels of the paleoclimate on different continents.

scholarly journals Biostratigraphic re-evaluation of the lower to middle Miocene succession in the Eastern Carpathians: a case study related to the oil fields of the Diapir Fold Zone, Romania

2020 ◽  
Vol 64 (3) ◽  
Author(s):  
Sorin FILIPESCU ◽  
Dan M. TĂMAS ◽  
Răzvan-Ionut BERCEA ◽  
Alexandra TĂMAS ◽  
Ramona BĂLC ◽  
...  
Keyword(s):  
Middle Miocene ◽  
Oil Fields ◽  
Eastern Carpathians

scholarly journals Increasing the energy efficiency of dwelling houses: case study of residential quarter in Upper Silesia, Poland

2019 ◽  
Vol 18 (1) ◽  
pp. 023-032
Author(s):  
Anna Ostańska
Keyword(s):  
Energy Efficiency ◽  
Energy Saving ◽  
Considerable Improvement ◽  
Upper Silesia ◽  
Residential Quarter ◽  
The City ◽  
Emission Restriction

The paper assesses thermomodernisation measures aimed at improving energy efficiency of dwelling houses in a city quarter in Upper Silesia, Poland. The area was encompassed by the city council’s program of emission restriction that promoted energy saving activities. The assessment was carried out by means of thermographic examination. It confirmed the fact that the thermomodernisation measures taken so far provided considerable improvement, but did not solved all issues. Further works should be undertaken on the basis of thorough examination of the current condition of the buildings.

scholarly journals Depositional Environment of Deep-Water Fan Facies: A Case Study of the Middle Miocene Interval at the Kutei and North Makassar Basins

2021 ◽  
Vol 22 (1) ◽  
pp. 45
Author(s):  
Kuntadi Nugrahanto ◽  
Ildrem Syafri ◽  
Budi Muljana
Keyword(s):  
Sea Level ◽  
Deep Water ◽  
Seismic Data ◽  
Depositional Environment ◽  
Middle Miocene ◽  
Oil And Gas ◽  
Seismic Stratigraphy ◽  
Horizontal Length ◽  
Sequence Boundaries

Massive exploration effort in the study area was conducted in 1996-2014 when deep-water drilling campaign found significant oil and gas discoveries but yet to optimally reach the middle Miocene deep-water sandstone reservoirs. Outcrops, well bores and 2D-seismic data had been incorporated in this study. Datum age from several taxon indicators have been utilized to correlate and unify various markers across the study area into four key biostratigraphy markers: M40, M45, M50, and M65. These four markers are at that point tied to the 2D seismic data in the act of the main horizons in conducting the seismic stratigraphy analysis over the study area not reached by wells. Identifying candidate of sub-regional sequence boundaries onshore and offshore that correspond with relative sea-level drops are the main result of this study. These results were integrated to generate the deep-water fan facies of the middle Miocene's gross depositional environment (GDE) maps, which generally show prograding succession easterly in the various shelf-breaks shifting laterally. The angle of slope and the horizontal length of the shelf-to-slope breaks significantly change from the Middle to Late Miocene until Recent time.Keywords: GDE, deep-water fan, Middle Miocene, Kutei, North Makassar.

High Resolution Correlation of Sequence Stratigraphy to Stipulate Further Hidrocarbon Prospect in A Mature Field : Case Study of Limau Field, South Sumatera Basin

2021 ◽  
Author(s):  
P. Suseno
Keyword(s):  
High Resolution ◽  
Depositional Environment ◽  
Middle Miocene ◽  
Well Log ◽  
Field Development ◽  
Sequence Stratigraphic ◽  
Sediment Deposits ◽  
Order Sequence ◽  
Rms Amplitude

The Limau Trend Structure is located in the South Sumatera Basin of Indonesia. The main reservoir in this field is the Talang Akar Formation which is deposited in a fluvial complex that changes gradually into a shallow marine depositional environment in a transgressive phase of 3rd order sequence. The sediment deposit was developed from the Late Oligocene to Middle Miocene. A high-resolution sequence stratigraphic interpretation of the 3rd to 4th order was interpreted from the subsurface data (core and well log) combined with the outcrop observation that resulted in a comprehensive input for building a geological model. Based on this framework, the transgressive phase series in each parasequence set produces restricted sediment deposits that have the potential for stratigraphic traps. On the other hand, the amalgamated sands of the regression phase will be related to the structural traps. The RMS amplitude volume from seismic multi attributes analysis shows that the facies is changing with the reservoir distribution. The seismic attributes such as VpVs indicate a hydrocarbon presence. The combination of all data reveals that the stratigraphic traps are the main trapping mechanism in the Limau field. The field development works are now focusing in the northern area, on the transgressive phase of the 4th order parasequence set. It composes of a fluvial complex cycle that has a high potential for a virgin geometrically restricted (lense shaped) reservoir rather than well-connected and sand-rich maximum regressive reservoir facies. This transgressive phase reservoir of parasequence set (4th order) at the Northern Belimbing Field was proven by 2 (two) recently drilled wells. Both wells showed very good hydrocarbon indications and produced oil with an initial rate of 174 bopd & 1265 bopd respectively. These results confirmed the oil prospectivity within the transgressive phase of the 4th order parasequence set at the Northern Limau Trend. The initial resources estimation in the Northern Belimbing Field contains 65 MMBO. This is very promising for the development of the Belimbing Field, Limau Trend.

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