scholarly journals The Paleogene Tectonostratigraphy Of Northern Part Masalima Trench Basin

2016 ◽  
Vol 1 (1) ◽  
pp. 7
Author(s):  
Luhut Pardamean Siringoringo ◽  
Dardji Noeradi
Keyword(s):  
Depositional Environment ◽  
Middle Eocene ◽  
Normal Faults ◽  
Tectonic Structure ◽  
Shallow Marine ◽  
Early Oligocene ◽  
Basin Formation ◽  
Java Sea ◽  
Seismic Sections ◽  
Well Data

Northern part of Masalima Trench Basin is located in the southern part of the Strait of Makassar, which includes Masalima Trough and Massalima High. The area of research is an extension of the South Makassar Basin which extends from South Makassar Basin to the Northeast part of Java Sea. Subsurface data are used such as 2D seismic sections (21 lines) and data drilling wells (2 wells) to understand the tectonic structure in the basin formation and understand the stratigraphic order of basin. Based on well data can be known that Northern part Masalima Trench Basin is aborted rift because marked by post rift phase. Northern part Masalima Trench Basin was formed by normal faults which have trend northeast-southwest with  pre rift, early syn rift, late syn rift, and post rift sediment geometry. Early syn rift sediment was Middle Eocene, late syn rift sediment was Middle Eocene till Early Oligocene and post rift sediment was Early Oligocene till Early Miocene. The Depositional environment of early syn rift phase such as beach, shallow marine, and land. The Depositional environment of late syn rift phase such as beach till deep marine, and the depositional environment of post rift is deep marine.

THE QUEENSLAND TROUGH: ITS PETROLEUM POTENTIAL BASED ON SOME RECENT GEOPHYSICAL RESULTS

1975 ◽  
Vol 15 (1) ◽  
pp. 21 ◽  
Author(s):  
J. Pinchin ◽  
J. W. Hudspeth
Keyword(s):  
Middle Eocene ◽  
Outer Edge ◽  
Early Eocene ◽  
Petroleum Potential ◽  
Shallow Marine ◽  
Coral Sea ◽  
Basement Faults ◽  
Seismic Sections ◽  
Basement Surface ◽  
Marginal Reef

The Queensland Trough, about 130 km wide, lies between Queensland and the Coral Sea Plateau. It runs from a water depth of 1000 m off Townsville to 3000 m opposite Cape Melville.The most extensive and systematic geophysical survey of the area to date is that conducted by the BMR during 1971 as part of the survey of the Australian continental margin.The BMR sparker seismic sections show a rugged and eroded basement surface. It is concluded that this represents the top of mildly metamorphosed Palaeozoic sediments of the Tasman Geosyncline which were uplifted, folded, and faulted during the Permian and were subsequently severely eroded. In places coral reefs have grown from this basement surface. Some are now buried and some, especially those atop basement highs, are still growing.The Eocene/Oligocene unconformity encountered in the DSPD hole 209 on the outer edge of the Coral Sea Plateau can be traced as an unconformity over the entire trough and as a conformable Eocene seismic horizon over most of the trough. This horizon lies close to the basement over much of the plateau and at least 1.5 km above the basement in the centre of the trough. It is overlain by about 0.5 km of sediments over both the trough and the plateau.It appears that the trough was low relative to the plateau and the mainland since the beginning of the Mesozoic and received terrestrial and shallow marine sediments.Regional subsidence of the trough and plateau probably began in the Early Eocene. Small basins on the trough's eastern margin and on the plateau were formed by differential subsidence along rejuvenated basement faults. These small basins contain lower to middle Eocene shallow marine sediments.Petroleum prospects appear favourable in the south of the trough, especially in the trough's marginal reef development and in the region of pre-Eocene pinch-out against Palaeozoic basement.

Eocene–Oligocene stratigraphy and structural history of the Karaburun area, southwestern Black Sea coast, Turkey: transition from extension to compression

2015 ◽  
Vol 152 (6) ◽  
pp. 1104-1122 ◽  
Author(s):  
BORIS NATAL’IN ◽  
ADALET GIZEM SAY
Keyword(s):  
Black Sea ◽  
Tectonic Activity ◽  
Normal Faults ◽  
Shallow Marine ◽  
Early Oligocene ◽  
Marine Shale ◽  
Thrace Basin ◽  
Black Sea Coast ◽  
Nw Turkey ◽  
Sea Coast

AbstractThe stratigraphic succession exposed in the Karaburun area (southern Black Sea coast, NW Turkey) records multiple changes in depositional and tectonic settings during Cenozoic times. It starts with the Middle–Upper Eocene Soğucak Formation of reef limestone that across a normal fault, omitting the lower part of the Lower Oligocene Ceylan Formation (deep-marine shale unit), abuts the upper part of the Ceylan Formation that is made up of two facies: (1) shallow-marine sandstone and (2) shallow-marine limestone units containing horizons of submarine slumps. Both facies are unconformably overlain by the fluvial Upper Miocene Çukurçeşme Formation. The tectonic record includes: (1) latest Eocene – Early Oligocene NE–SW extension, (2) Early Oligocene NE–SW shortening and (3) Late Miocene NW–NE extension. The earliest normal faults cutting the Soğucak and the lower part of the Ceylan formations are associated with clastic dykes injected into the deep-marine shale. These structures suggest a disruption of the Eocene carbonate platform and are also known in the neighbouring Thrace Basin. The following NE–SW shortening created the NE-vergent Karaburun Thrust that is synchronous with the shallowing and inversion of the Ceylan Basin. Rotation of the stress field is recorded by changes in clastic dyke orientation and their deformation. Compression caused multiple westerly directed submarines slides from uplifts in easterly located regions. This event is not recorded in the Thrace Basin. Finally, the Miocene tectonic activity formed NW- and NE-striking normal faults. The outlined tectonic history includes Early Oligocene extensional and compressional episodes recorded in the southern margin of the Black Sea that had hitherto not been known.

scholarly journals Eocene exhumation and extensional basin formation in the Copper Mountains, Nevada, USA

Geosphere ◽  
2019 ◽  
Vol 15 (5) ◽  
pp. 1577-1597
Author(s):  
Andrew S. Canada ◽  
Elizabeth J. Cassel ◽  
Allen J. McGrew ◽  
M. Elliot Smith ◽  
Daniel F. Stockli ◽  
...  
Keyword(s):  
Hanging Wall ◽  
Normal Fault ◽  
High Elevation ◽  
Late Eocene ◽  
Closure Temperature ◽  
Coarse Grained ◽  
Normal Faults ◽  
Extensional Deformation ◽  
Early Oligocene ◽  
Basin Formation

Abstract Within extended orogens, records that reflect the driving processes and dynamics of early extension are often overprinted by subsequent orogenic collapse. The Copper Mountains of northeastern Nevada preserve an exceptional record of hinterland extensional deformation and high-elevation basin formation, but current geochronology and thermochronology are insufficient to relate this to broader structural trends in the region. This extension occurred concurrent with volcanism commonly attributed to Farallon slab removal. We combine thermochronology of both synextensional hanging-wall strata and footwall rocks to comprehensively evaluate the precise timing and style of this deformation. Specifically, we apply (U-Th)/(He-Pb) double dating of minerals extracted from Eocene–Oligocene Copper Basin strata with multi-mineral (U-Th)/He and 40Ar/39Ar thermochronology of rocks sampled across an ∼20 km transect of the Copper Mountains. We integrate basement and detrital thermochronology records to comprehensively evaluate the timing and rates of hinterland extension and basin sedimentation. Cooling and U-Pb crystallization ages show the Coffeepot Stock, which spans the width of the Copper Mountains, was emplaced at ca. 109–108 Ma, and then cooled through the 40Ar/39Ar muscovite and biotite closure temperatures by ca. 90 Ma, the zircon (U-Th)/He closure temperature between ca. 90 and 70 Ma, and the apatite (U-Th)/He closure temperature between 43 and 40 Ma. Detrital apatite and zircon (U-Th)/(He-Pb) double dating of late Eocene fluvial and lacustrine strata of the Dead Horse Formation and early Oligocene fluvial strata of the Meadow Fork Formation, both deposited in Copper Basin, shows that Early Cretaceous age detrital grains have a cooling history that is analogous to proximal intrusive rocks of the Coffeepot Stock. At ca. 38 Ma, cooling and depositional ages for Copper Basin strata reveal rapid exhumation of proximal source terranes (cooling rate of ∼37 °C/m.y.); in these terranes, 8–12 km of slip along the low-angle Copper Creek normal fault exhumed the Coffeepot Stock in the footwall. Late Eocene–early Oligocene slip along this fault and an upper fault splay, the Meadow Fork fault, created a half graben that accommodated ∼1.4 km of volcaniclastic strata, including ∼20 m of lacustrine strata that preserve the renowned Copper Basin flora. Single-crystal sanidine 40Ar/39Ar geochronology of interbedded tuffs in Copper Basin constrains the onset of rapid exhumation to 38.0 ± 0.9 Ma, indicating that surface-breaching extensional deformation was coincident with intense proximal volcanism. Coarse-grained syndeformational sediments of the Oligocene Meadow Fork Formation were deposited just prior to formation of an extensive regional Oligocene–Miocene unconformity and represent one of the most complete hinterland stratigraphic records of this time. We interpret this history of rapid late Eocene exhumation across the Copper Mountains, coeval volcanism, and subsequent unconformity formation to reflect dynamic and thermal effects associated with Farallon slab removal. The final phase of extension is recorded by late, high-angle normal faults that cut and rotate the early middle Miocene Jarbidge Rhyolite sequence, deposited unconformably in the hanging wall. These results provide an independent record of episodic Paleogene to Miocene exhumation documented in Cordilleran metamorphic core complexes and establish that substantial extension occurred locally in the hinterland prior to province-wide Miocene extensional break-up.

Age and depositional environment of the Rock River coal basin, Yukon Territory, Canada

1994 ◽  
Vol 31 (5) ◽  
pp. 865-880 ◽  
Author(s):  
D. G. F. Long ◽  
A. R. Sweet
Keyword(s):  
Depositional Environment ◽  
Middle Eocene ◽  
Late Eocene ◽  
Yukon Territory ◽  
Temperate Climate ◽  
Fluvial System ◽  
Coal Basin ◽  
Early Oligocene ◽  
Palynological Assemblage ◽  
Latest Eocene

Poorly exposed Late Eocene strata in the Rock River basin, 115 km northeast of Watson Lake, accumulated in an intermontane valley with a geometry and history controlled by subsidence associated with the Rock River Fault. The sequence, as seen in one outcrop and five borehole sections, is dominated by drab mudrocks with minor sandstones and some thick lenses of coal. The mudrocks accumulated in floodplain marsh and pond settings associated with a low-gradient, possibly anastomosed, fluvial system. River banks were stable owing to the abundance of plant roots in the channel walls. Although channel sandstone and conglomerate were not identified in the core, the abundance of coarsening- and fining-upwards sets of sandstone of splay origin indicates pronounced levee development. Woody coals accumulated in areas well away from the main channel, in a series of elongate forested swamps, which were periodically inundated by flood water.The overall palynological assemblage is typical of the Eocene and Early Oligocene. A Late Eocene age is inferred from the presence of Gothanipollis in combination with the absence of index species for the Early–Middle Eocene and the latest? Eocene and Oligocene. The low miospore diversity indicates a temperate climate. The dominance of the palynological assemblage by Taxodiaceae–Cupressaceae pollen indicates wet–humid conditions.

scholarly journals Lithofacies and Sedimentation of Organic Matter in Fine Grained Rocks of Nanggulan Formation in Kulon Progo, Yogyakarta

2016 ◽  
Vol 1 (2) ◽  
pp. 82
Author(s):  
Donatus Hendra Amijaya ◽  
Najibatul Adibah ◽  
Ahmad Z.A. Ansory
Keyword(s):  
Organic Matter ◽  
Depositional Environment ◽  
Inorganic Material ◽  
Middle Eocene ◽  
Late Eocene ◽  
Geochemical Data ◽  
Environment Analysis ◽  
Shallow Marine ◽  
Fine Grained ◽  
Gas Source

Fine grained rocks especially shale play a significant role in shale hydrocarbon system. Research on Eocene Nanggulan shale becomes an interest lately since this shale is considered as prospective interval for shale gas source. It potentially contains significant organic matter because coaly sediment is found in this formation as well. Nanggulan Formation fine grained rocks was deposited in various depositional environment from estuary – shallow marine. This paper integrates the result of lithofacies and depositional environment analysis with organic geochemical data to understand the sedimentation process of organic matter. Samples were taken from cores. The result of 14 geochemically analysed samples shows Total Organic Carbon (TOC) content between 0.36–1.00 % for fin e grained rocks (shales) and 12.80 % for coaly shales. Nine samples are categorized as fair and 2 samples are categorized as good source rock. The depositional environment of Nanggulan Formation sediment, which was shallow marine at Late Eocene and estuary (salt marsh) at Early Eocene, produced sediment with higher TOC. Whereas the deposition of sediment in estuary (tidal flat) at Middle Eocene produced lower content of TOC. Vulcanic activity at Middle Eocene also caused less organic material preservation because it produced abundant inorganic material.

scholarly journals On the occurrence of ichnogenera Planolites and Psilonichnus from the Jogira Formation (Lower to Middle Eocene), Bikaner Basin, Western India: Implications on depositional environment

2021 ◽  
Vol 38 (1) ◽  
pp. 103-108
Author(s):  
Shyam Narayan Mude ◽  
Ravindrasing Pardeshi ◽  
Manoj Memane
Keyword(s):  
Marine Environment ◽  
Significant Role ◽  
Depositional Environment ◽  
Middle Eocene ◽  
Western India ◽  
Shallow Marine ◽  
Sandy Shale ◽  
Characteristic Features ◽  
Cenozoic Sediments ◽  
Present Section

Abstract: The Cenozoic sediments of the Bikaner basin are lithostratigraphically classified into four formations in ascending order of deposition viz., Palana Formation, Marh Formation, Jogira Formation and Kolayat Formation. The present paper records ichnofossils viz., Planolites montanus, P. beverleyensis and Psilonichnus isp from Jogira Formation (Lower Middle Eocene) of Bikaner basin, Western India. The presence of these ichnofossils in a succession exposed in a quarry SE of Jogira Lake plays a significant role in deciphering the depositional environment of Jogira Formation. In the present section two ichnofossil horizons are marked, the lower horizon is dominated by Psilonichnus isp whereas upper horizon is conquered by Planolites montanus, and P. beverleyensis. The sedimentological characteristic features and associated ichnofossils from the studied succession infer that the deposition of the sediments of the Jogira Formation initiated with lagoonal to backshore environment with the formation of mudstone and sandy shale, later with rise in the bathymetry from onshore to shallow marine environment, fossiliferous limestones were formed.

scholarly journals The model of gas pool formation in Frakulla area, Albania

2001 ◽  
Vol 34 (3) ◽  
pp. 1247
Author(s):  
R. KOCI ◽  
A. GJIKA ◽  
Q. AVDULAJ ◽  
S. KOCI
Keyword(s):  
Depositional Environment ◽  
Hydrocarbon Accumulation ◽  
Central Mediterranean ◽  
Tectonic Faults ◽  
Seismic Sections ◽  
Well Data ◽  
Mud Diapir ◽  
Surface Geology ◽  
Pool Formation ◽  
Adriatic Basin

Frakulla diapir is one of the studied diapirs in Albania. It is located in the western part of Albania. The Serravallian to Pliocene sediments belongs to the uppermost part of the Adriatic Basin, which is included in the central Mediterranean Basins group. Some anticline and syncline structures are indicated in the western part of Albania. These structures are placed in a linear way forming some structural ranges with SSE-NNW axis direction. Frakulla is one of these structures as a part of Vlora-Panaja-Frakkull range (Fig. 1). Based on the surface geology, well data and the interpretation of the seismic sections results that this structure is formed as a consequence of the mud diapir growth. This diapir is complicated with tectonic faults in both western and eastern flanks, which dip with angle 45-90° The southern and northern ends of the structure are clearly seen in the seismic sections and a number of wells penetrated these ends. We think that the Frakulla structure is a typical mud diapir surrounding in all directions by many gas sandstone beds. These sandstones are formed in a deltaic environment during the Messinian (Globorotalia conomiozea zone). Some factors affected the quantity of hydrocarbon accumulation are discussed in this paper like: structural character of the area, pattern and complexity of faulting around and over the mud diapir, depositional environment, rate of growth of the diapir and time of uplift. We think that the presence of gas accumulation in Frakulla area is as a consequence of a favorable interrelation of these factors

scholarly journals LATE CRETACEOFS SEDIMENTARY ROCK IN BARITO BASIN, INDONESIA: LITHOLOGY, PALEONTOLOGY, AND PALEOENVIRONMENT

2019 ◽  
Vol 42 (3) ◽  
pp. 131-143
Author(s):  
Akmaluddin Akmaluddin ◽  
Muhammad Virgiana A ◽  
Salahuddin Husein ◽  
Muhammad I. Novian ◽  
Nugroho I. Setiawan ◽  
...  
Keyword(s):  
Sedimentary Rock ◽  
Depositional Environment ◽  
Middle Eocene ◽  
Sedimentary Rocks ◽  
Early Oligocene ◽  
Early Tertiary ◽  
Terrestrial Environments ◽  
Large Foraminifera ◽  
Back Arc ◽  
New Evidence

The Barito Basin so far known as back-arc basin that formed by the rifting in Early Tertiary, which the oldest sedimentary rock in this basin is believed has a Middle Eocene to Early Oligocene age. However, this research will present new evidence regarding the existence of sedimentary rocks that are older than Cenozoic age in the Barito Basin. This research was carried out on Bongkang-2 well, as the main data, and other five wells which have an indication of the discovery of Pre-Tertiary sedimentary rocks, which are generally located in the northern part of the Barito Basin. Integration of mud log data, petrography, paleontology, and dip-meter data, resulting the identification of lithology, age and depositional environment, and then interpretation of the paleoenvironment of the Barito Basin in the Late Cretaceous is carried out. Based on the analysis of data, it is show that Pre-Tertiary sedimentary rocks found in the six wells analyzed has Cenomanian age, which is indicated by the presence of large foraminifera fossils in the form of Sulcoperculina sp. and Orbitolina sp. in Bongkang-2, Hayup-1 and Hayup-3 wells, as well as palynomorph fossils in the form of Cicatrico- sisporites dorogensis, A. tricornitatus, Aquilapollenites sp., Distaverrusporites margaritus and Classopolis cf. classoidesin Bagok-1 and Bagok-2 wells. In addition, based on lithological analysis, in the Bongkang-2, Hayup-1 and Hayup-2 wells lithology develops in the form of limestone, shale and sandstone, while in the Didi-1, Bagok-1 and Bagok-2 wells lithology develops in the form of shale with sandstone and pyroclastic volcaniclastics rock intercalation. Then, based on the integration of lithology and paleontology analysis, it is known that in the Cenomanian age, terrestrial environments developed in the western part of the Barito Basin, while in the eastern part the shallow marine environment developed.

Depositional environment of Upper Paleocene – Middle Eocene series of the Lesser Himalaya, Central Nepal

Lithos ◽  
2021 ◽  
Vol 388-389 ◽  
pp. 106060
Author(s):  
Bhupati Neupane ◽  
Junmeng Zhao ◽  
Babu Ram Gyawali ◽  
Yan Deng ◽  
Bishal Maharjan ◽  
...  
Keyword(s):  
Depositional Environment ◽  
Middle Eocene ◽  
Lesser Himalaya ◽  
Central Nepal ◽  
Upper Paleocene

scholarly journals The Cenozoic Malaguide Basin from Sierra Espuña (Murcia, S Spain): An Example of Geological Heritage

Geosciences ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 34
Author(s):  
Santiago Moliner-Aznar ◽  
Manuel Martín-Martín ◽  
Tomás Rodríguez-Estrella ◽  
Gregorio Romero-Sánchez
Keyword(s):  
Middle Eocene ◽  
Geological Heritage ◽  
Passive Margin ◽  
Early Miocene ◽  
Late Oligocene ◽  
Deep Basin ◽  
Sedimentary Evolution ◽  
Early Oligocene ◽  
Upper Oligocene ◽  
Very High

The Cenozoic Malaguide Basin from Sierra Espuña (Internal Betic Zone, S Spain) due to the quality of outcropping, areal representation, and continuity in the sedimentation can be considered a key-basin. In the last 30 years, a large number of studies with very different methodological approaches have been done in the area. Models indicate an evolution from passive margin to wedge-top basin from Late Cretaceous to Early Miocene. Sedimentation changes from limestone platforms with scarce terrigenous inputs, during the Paleocene to Early Oligocene, to the deep basin with huge supplies of turbidite sandstones and conglomerates during the Late Oligocene to Early Miocene. The area now appears structured as an antiformal stack with evidence of synsedimentary tectonics. The Cenozoic tectono-sedimentary basin evolution is related to three phases: (1) flexural tectonics during most of the Paleogene times to create the basin; (2) fault and fold compartmentation of the basin with the creation of structural highs and subsiding areas related to blind-fault-propagation folds, deforming the basin from south to north during Late Oligocene to Early Aquitanian times; (3) thin-skin thrusting tectonics when the basin began to be eroded during the Late Aquitanian-Burdigalian. In recent times some works on the geological heritage of the area have been performed trying to diffuse different geological aspects of the sector to the general public. A review of the studies performed and the revisiting of the area allow proposing different key-outcrops to follow the tectono-sedimentary evolution of the Cenozoic basin from this area. Eight sites of geological interest have been selected (Cretaceous-Cenozoic boundary, Paleocene Mula Fm, Lower Eocene Espuña-Valdelaparra Fms, Middle Eocene Malvariche-Cánovas Fms, Lowermost Oligocene As Fm, Upper Oligocene-Lower Aquitanian Bosque Fm, Upper Oligocene-Aquitanian Río Pliego Fm, Burdigalian El Niño Fm) and an evaluation has been performed to obtain four parameters: the scientific value, the educational and touristic potential, and the degradation risk. The firsts three parameters obtained values above 50 being considered of “high” or “very high” interest (“very high” in most of the cases). The last parameter shows always values below 50 indicating a “moderate” or “low” risk of degradation. The obtained values allow us considering the tectono-sedimentary evolution of this basin worthy of being proposed as a geological heritage.

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