Thermal history and basin evolution of the Moatize - Minjova Coal Basin (N'Condédzi sub-basin, Mozambique) constrained by organic maturation levels

Galasso, Francesca; Fernandes, Paulo; Montesi, Giovanni; Marques, João; Spina, Amalia; Pereira, Zélia

doi:10.1016/j.jafrearsci.2019.02.020

Cited by 23 publications

(11 citation statements)

References 26 publications

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“…and Thymospora sp.). This feature was confirmed by the UV fluorescence colour of the non-oxidized spores, and permitted to identify and confirm an erosive episode that occurred in the MMCB during the Middle Triassic (Fernandes et al, 2015;Galasso et al, 2019). The identification of palynomorphs reworking is critical (Lindström and McLoughlin, 2007;di Pasquo et al, 2017) in particular in the stratigraphic sequences related to mass-extinctions events, as for instance the Permian-Triassic Boundary (PTB).…”

Section: Palynostratigraphic Age Interpretationsmentioning

confidence: 82%

“…Spore UV fluorescence analysis on non-oxidized palynological residues confirms this feature. The reworked spores show dark orange fluorescence colours or have no fluorescence, whereas the indigenous palynomorph population shows intense yellow fluorescence colour, indicating lower organic maturation levels than the reworked population (Galasso et al, 2019).…”

Section: Assemblage T2mentioning

confidence: 97%

“…2). According to Lakshminarayana (2015), the throw of the Mwanza Fault is more than 700 m towards the south, but Galasso et al (2019) estimates that the throw of this fault is more than 1000 m towards the same direction, due to the presence of a combined Lopingian to Middle Triassic succession with a thickness of ca. 1500 m. In the southern margin of this sub-basin, Karoo sedimentary rocks rest either unconformably over the Mesoproterozoic gabbros-anorthosites of the Tete Suite or are faulted against the later lithologies (Fig.…”

Section: Geological Setting Of the N'condédzi Sub-basinmentioning

confidence: 99%

“…and Leiotriletes directus are also present throughout PTB time interval (Lindström and McLoughlin, 2007) but not present in Upper Triassic. In the MMCB, the common presence of these taxa in the Upper Triassic sedimentary rocks is interpreted as reworked inferred from UV spore fluorescence colours (Galasso et al, 2019), being an independent tool to estimate the degree of reworking at these ages.…”

Section: Palynostratigraphic Age Interpretationsmentioning

confidence: 99%

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First record of Permo-Triassic palynomorphs of the N’Condédzi sub-basin, Moatize-Minjova Coal Basin, Karoo Supergroup, Mozambique

Galasso

Pereira

Fernandes

et al. 2019

Revue de Micropaléontologie

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Permian-Triassic ages have been identified for the first time in the Karoo Supergroup of the N'Condédzi sub-basin, Moatize-Minjova Coal Basin, Mozambique. This transition was identified in a coal exploration borehole that penetrated the Matinde and Cádzi formations. The top of the Matinde Formation is dated latest Permian (Lopingian), and the Cádzi Formation is attributed to Triassic based on palynostratigraphy. The Lopingian age is established by the identification of three palyno-assemblages: Assemblage L1 based on the first occurrence (FO) of Guttulapollenites pollen, Assemblage L2 is marked by the FO of Thymospora pseudothiessenii, and Assemblage L3 is defined by the FO of Osmundacidites senectus. Triassic palynomorphs were identified for the first time in Mozambique (Karoo basins). The data allowed the identification of three assemblages: Assemblage T1 defined by the FO of Densoisporites nejburgii of Induan age, Assemblage T2 is marked by the FO of Platysaccus queenslandi and assigned to the Olenekian age, and Assemblage T3 is defined by the FO of Samaropollenites speciosus and Enzonalasporites vigens, indicating a Carnian age. No Middle Triassic rocks were identified, and the early Triassic sediments are overlain by sedimentary rocks of Carnian age, a hiatus that may correspond to an important tectonic event with uplift and erosion. This tectonic event is also suggested by the occurrence of common reworked Permian palynomorphs in the Carnian sedimentary rocks. These new data constrain the age of the Karoo Supergroup formations of Mozambique and contribute to improve the palaeoecological, palaeoclimatic evolution, and the palaeogeographic position of the Karoo Mozambique basins within the Gondwana supercontinent.

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Section: Palynostratigraphic Age Interpretationsmentioning

confidence: 82%

Section: Assemblage T2mentioning

confidence: 97%

Section: Geological Setting Of the N'condédzi Sub-basinmentioning

confidence: 99%

Section: Palynostratigraphic Age Interpretationsmentioning

confidence: 99%

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First record of Permo-Triassic palynomorphs of the N’Condédzi sub-basin, Moatize-Minjova Coal Basin, Karoo Supergroup, Mozambique

Galasso

Pereira

Fernandes

et al. 2019

Revue de Micropaléontologie

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“…and Reduviasporonites chalastus. This incertae sedis organic microfossil relatively long range from Capitanian (late Guadalupian) to Early Triassic and widespread occur in different countries as well as Australia, Greenland, South China (Meishan, GSSP of Permian-Triassic boundary), Russian Platform, UK, Austria, USA, South Africa and other (e.g [92][93][94][95][96]…”

mentioning

confidence: 99%

The Gavorrano Monzogranite (Northern Apennines): An Updated Review of Host Rock Protoliths, Thermal Metamorphism and Tectonic Setting

Brogi¹,

Caggianelli²,

Liotta³

et al. 2020

Preprint

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We review and refine the geological setting of an area located nearby the Tyrrhenian seacoast, in the inner zone of the Northern Apennines (southern Tuscany), where a Neogene monzogranite body (estimated in about 3 km long, 1.5 km wide, and 0.7 km thick) emplaced during early Pliocene. This magmatic intrusion, known as the Gavorrano pluton, is partially exposed in a ridge bounded by regional faults delimiting broad structural depressions. A widespread circulation of geothermal fluids accompanied the cooling of the magmatic body and gave rise to an extensive Fe-ore deposit (mainly pyrite) exploited during the past century. The tectonic setting which favoured the emplacement and exhumation of the Gavorrano pluton is strongly debated with fallouts on the comprehension of the Neogene evolution of this sector of the inner Northern Apennines. Data from a new fieldwork dataset, integrated with information from the mining activity, have been integrated to refine the geological setting of the whole crustal sector where the Gavorrano monzogranite was emplaced and exhumed. Our review, implemented by new palynological, petrological and structural data pointed out that: i) the age of the Palaeozoic phyllite (hosting rocks) is middle-late Permian, thus resulting younger than previously described (i.e. pre-Carboniferous); ii) the P-T conditions at which the metamorphic aureole developed are estimated at about 660 °C and at a maximum depth of c. 5 km; iii) the tectonic evolution which determined the emplacement and exhumation of the monzogranite is constrained in a transfer zone, in the frame of the extensional tectonics affecting the area continuously since Miocene.

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Late Permian palaeoenvironmental evolution of the Matinde Formation in the Muarádzi Sub-basin, Moatize-Minjova Basin, Mozambique

Lopes

Pereira

Fernandes

et al. 2021

Journal of African Earth Sciences

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Thermal history and basin evolution of the Moatize - Minjova Coal Basin (N'Condédzi sub-basin, Mozambique) constrained by organic maturation levels

Abstract: Kerogen concentrates obtained from Lopingian (Late Permian) to Thermal history and basin evolution of the Moatize -Minjova Coal Basin (N'Condédzi 1 sub-basin, Mozambique) constrained by organic maturation levels 2 3

Cited by 23 publications

References 26 publications

First record of Permo-Triassic palynomorphs of the N’Condédzi sub-basin, Moatize-Minjova Coal Basin, Karoo Supergroup, Mozambique

First record of Permo-Triassic palynomorphs of the N’Condédzi sub-basin, Moatize-Minjova Coal Basin, Karoo Supergroup, Mozambique

The Gavorrano Monzogranite (Northern Apennines): An Updated Review of Host Rock Protoliths, Thermal Metamorphism and Tectonic Setting

Late Permian palaeoenvironmental evolution of the Matinde Formation in the Muarádzi Sub-basin, Moatize-Minjova Basin, Mozambique

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