Sequence hierarchy in a Mesoproterozoic interior sag basin: from basin fill to reservoir scale, the Tombador Formation, Chapada Diamantina Basin, Brazil

2015 ◽  
Vol 28 (3) ◽  
pp. 393-432 ◽  
Author(s):  
A. J. C. Magalhães ◽  
G. P. Raja Gabaglia ◽  
C. M. S. Scherer ◽  
M. B. Bállico ◽  
F. Guadagnin ◽  
...  
Keyword(s):  
Chapada Diamantina ◽  
Sag Basin ◽  
Basin Fill

scholarly journals NOVA ABORDAGEM TECTONO-ESTRATIGRÁFICA DO SUPERGRUPO ESPINHAÇO EM SUA PORÇÃO MERIDIONAL (MG)

2013 ◽  
Author(s):  
Farid Chemale Jr. ◽  
Ivo Antônio Dussin ◽  
Maximiliano Martins ◽  
Marcelo Nascimento dos Santos
Keyword(s):  
Minas Gerais ◽  
Zircon Geochronology ◽  
Chapada Diamantina ◽  
Espinhaço Range ◽  
Sedimentary Evolution ◽  
Intracontinental Rift ◽  
Minas Gerais State ◽  
Current Region ◽  
Basin Fill

O Supergrupo Espinhaço Meridional é formado por duas grandes sucessões sedimentares separados por nítida discordância angular, interpretada como dois ciclos de preenchimento de bacia: (1) o primeiro Estateriano (1,78 to 1,70 Ga), interpretado como rifte intracontinental, (ii) outro Esteniano-Toniano (1,18 to 0,91 Ga) como uma bacia intracratônica cujo processo inicial de subsidência ocorreu por implantação de um rifte. A ausência de um ciclo bacinal intermediário (1,6 Ga - 1,3 Ga), presente apenas na Chapada Diamantina, permite inferir que a atual região ocupada pela Serra do Espinhaço Meridional comportou-se como um alto estrutural ou área de não deposição.Palavras-chave: Supergrupo Espinhaço Meridional, geocronologia U-Pb em zircões, ciclos bacinais, evolução tectono-sedimentar. ABSTRACT: A NEW TECTONO-STRATIGRAPHIC APPROACH FOR THE SOUTHERN ESPINHAÇO SUPERGROUP, MINAS GERAIS STATE. The Espinhaço Supergroup in Southern Espinhaço, Minas Gerais, contains thus two unconformably successions, which can be interpreted as two basin fill cycles: (i) one Statherian (1,78 to 1,71 Ga) as intracontinental rift, (ii) and another Stenian-Tonian (1,18 to 0,91 Ga) as intracontinental rift-sag successor basin. The absence of a intermediary cycle (1,6 Ga – 1,3 Ga), present only in Chapada Diamantina (Bahia State), allows to infer that the current region occupied by the Southern Espinhaço Range held like a structural top or area of non-deposition at this time.Keywords: Southern Espinhaço Supergroup, U-Pb zircon geochronology, basinal cycles, tectono-sedimentary evolution.

Subsurface stratigraphy and basin-fill architecture of the late Paleozoic eastern Taos trough, northern New Mexico, U.S.A.

2020 ◽  
Vol 57 (3) ◽  
pp. 149-176
Author(s):  
Nur Uddin Md Khaled Chowdhury ◽  
Dustin E. Sweet
Keyword(s):  
New Mexico ◽  
Sediment Accumulation ◽  
Late Paleozoic ◽  
North Central ◽  
The North ◽  
Basement Rocks ◽  
Basin Geometry ◽  
Deformation Event ◽  
Thrust System ◽  
Basin Fill

The greater Taos trough located in north-central New Mexico represents one of numerous late Paleozoic basins that formed during the Ancestral Rocky Mountains deformation event. The late Paleozoic stratigraphy and basin geometry of the eastern portion of the greater Taos trough, also called the Rainsville trough, is little known because the strata are all in the subsurface. Numerous wells drilled through the late Paleozoic strata provide a scope for investigating subsurface stratigraphy and basin-fill architecture of the Rainsville trough. Lithologic data obtained predominantly from petrophysical well logs combined with available biostratigraphic data from the greater Taos trough allows construction of a chronostratigraphic framework of the basin fill. Isopach- and structure-maps indicate that the sediment depocenter was just east of the El Oro-Rincon uplift and a westerly thickening wedge-shaped basin-fill geometry existed during the Pennsylvanian. These relationships imply that the thrust system on the east side of the Precambrian-cored El Oro-Rincon uplift was active during the Pennsylvanian and segmented the greater Taos trough into the eastern Rainsville trough and the western Taos trough. During the Permian, sediment depocenter(s) shifted more southerly and easterly and strata onlap Precambrian basement rocks of the Sierra Grande uplift to the east and Cimarron arch to the north of the Rainsville trough. Permian strata appear to demonstrate minimal influence by faults that were active during the Pennsylvanian and sediment accumulation occurred both in the basinal area as well as on previous positive-relief highlands. A general Permian decrease in eustatic sea level and cessation of local-fault-controlled subsidence indicates that regional subsidence must have affected the region in the early Permian.

Stratigraphic Architecture of a Fluvial-lacustrine Basin-fill Succession at Desolation Canyon, Uinta Basin, Utah: Reference to Walthers’ Law and Implications for the Petroleum Industry

2016 ◽  
Vol 53 (1) ◽  
pp. 5-28 ◽  
Author(s):  
Grace Ford ◽  
David Pyles ◽  
Marieke Dechesne
Keyword(s):  
Cross Section ◽  
Oil Shale ◽  
Large Scale ◽  
Green River Formation ◽  
Sand Content ◽  
Fluvial System ◽  
Uinta Basin ◽  
Green River ◽  
Lacustrine Basin ◽  
Basin Fill

A continuous window into the fluvial-lacustrine basin-fill succession of the Uinta Basin is exposed along a 48-mile (77-kilometer) transect up the modern Green River from Three Fords to Sand Wash in Desolation Canyon, Utah. In ascending order the stratigraphic units are: 1) Flagstaff Limestone, 2) lower Wasatch member of the Wasatch Formation, 3) middle Wasatch member of the Wasatch Formation, 4) upper Wasatch member of the Wasatch Formation, 5) Uteland Butte member of the lower Green River Formation, 6) lower Green River Formation, 7) Renegade Tongue of the lower Green River Formation, 8) middle Green River Formation, and 9) the Mahogany oil shale zone marking the boundary between the middle and upper Green River Formations. This article uses regional field mapping, geologic maps, photographs, and descriptions of the stratigraphic unit including: 1) bounding surfaces, 2) key upward stratigraphic characteristics within the unit, and 3) longitudinal changes along the river transect. This information is used to create a north-south cross section through the basin-fill succession and a detailed geologic map of Desolation Canyon. The cross section documents stratigraphic relationships previously unreported and contrasts with earlier interpretations in two ways: 1) abrupt upward shifts in the stratigraphy documented herein, contrast with the gradual interfingering relationships proposed by Ryder et al., (1976) and Fouch et al., (1994), 2) we document fluvial deposits of the lower and middle Wasatch to be distinct and more widespread than previously recognized. In addition, we document that the Uteland Butte member of the lower Green River Formation was deposited in a lacustrine environment in Desolation Canyon. Two large-scale (member-scale) upward patterns are noted: Waltherian, and non-Waltherian. The upward successions in Waltherian progressions record progradation or retrogradation of a linked fluvial-lacustrine system across the area; whereas the upward successions in non-Waltherian progressions record large-scale changes in the depositional system that are not related to progradation or retrogradation of the ancient lacustrine shoreline. Four Waltherian progressions are noted: 1) the Flagstaff Limestone to lower Wasatch Formation member records the upward transition from lacustrine to fluvial—or shallowing-upward succession; 2) the upper Wasatch to Uteland Butte records the upward transition from fluvial to lacustrine—or a deepening upward succession; 3) the Uteland Butte to Renegade Tongue records the upward transition from lacustrine to fluvial—a shallowing-upward succession; and 4) the Renegade Tongue to Mahogany oil shale interval records the upward transition from fluvial to lacustrine—a deepening upward succession. The two non-Waltherian progressions in the study area are: 1) the lower to middle Wasatch, which records the abrupt shift from low to high net-sand content fluvial system, and 2) the middle to upper Wasatch, which records the abrupt shift from high to intermediate net-sand content fluvial system.

Provenance of the Phuquoc Basin fill, southern Indochina: implication for Early Cretaceous drainage patterns and basin configuration in Southeast Asia

2021 ◽  
Author(s):  
Tu-Anh Nguyen ◽  
Michael B.W. Fyhn ◽  
Jeppe Ågård Kristensen ◽  
Lars Henrik Nielsen ◽  
Tonny B. Thomsen ◽  
...  
Keyword(s):  
Southeast Asia ◽  
Early Cretaceous ◽  
Drainage Patterns ◽  
Basin Fill

scholarly journals Minerais do grupo da crichtonita em veios de quartzo da Serra do Espinhaço (Minas Gerais e Bahia)

2017 ◽  
Vol 17 (1) ◽  
pp. 31
Author(s):  
Mario Luiz de Sá Carneiro Chaves ◽  
Luiz Alberto Dias Menezes Filho
Keyword(s):  
De Novo ◽  
Minas Gerais ◽  
Chapada Diamantina

O trabalho descreve quatro minerais do grupo da crichtonita encontrados em veios hidrotermais de quartzo, que cortam diversas formações geológicas da Serra do Espinhaço (Supergrupo Espinhaço). Esses minerais – senaíta, crichtonita, almeidaíta e gramaccioliíta-(Y) – foram coletados em duas regiões: Presidente Kubitschek, ao sul de Diamantina (MG), e Novo Horizonte, na Chapada Diamantina Ocidental (BA). A idade de tais veios é relacionada ao final do Ciclo Brasiliano, em ca. 490 Ma. A senaíta é um mineral descoberto no Brasil e classicamente identificado nos aluviões diamantíferos da região de Diamantina; sua primeira ocorrência primária é aqui descrita. A crichtonita, apesar de conhecida desde longa data, teve seu primeiro depósito no país reportado nessa mesma região. A almeidaíta é o 61º e um dos mais recentes dos “minerais brasileiros”, sendo encontrada na região de Novo Horizonte. A gramaccioliíta-(Y), uma espécie descoberta na última década (Itália), tem sua primeira ocorrência brasileira descrita também nessa região. Os depósitos e as composições químicas desses minerais são caracterizados, bem como as problemáticas envolvidas até suas definições finais.

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