Clay mineral diagenesis in Cretaceous clastic reservoirs from West African passive margins (the South Gabon Basin) and its impact on regional geology and basin evolution history

Zanoni, Giovanni; Šegvić, Branimir; Moscariello, Andrea

doi:10.1016/j.clay.2016.09.032

Cited by 27 publications

(10 citation statements)

References 74 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Alterations of clay mineral assemblages, in particular mixed-layer illite-smectite (I-S) ratios and illite or chlorite crystallinity indices, have also been used to determine the maximum burial depths and interpret thermal evolution in sedimentary basins [11][12][13][14]20,21,24,[32][33][34][35][36]. The smectite to illite ratio in mixed-layer I-S as well as the ordering of mixed-layers are both variables that are susceptible to the temperature increase with depth and are controlled by the illitization process [12,37,38]. These diagenetic changes coincide with temperatures at which organic matter starts to generate liquid hydrocarbons [11,33,37]; therefore, understanding the mineralogy and presence of I-S mixed-layered phases can be used as a geothermal indicator of potential source rocks and maximum burial temperatures.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Shale Source Rocks and Clay Mineral Diagenesis in the Permian Basin, USA: Inferences on Basin Thermal Maturity and Source Rock Potential

et al. 2020

Self Cite

View full text Add to dashboard Cite

The use of mineral diagenetic indices and organic matter maturity is useful for reconstructing the evolution of sedimentary basins and critical assessments for potential source rocks for petroleum exploration. In this study, the relationship of clay mineral diagenesis and organic matter thermal indices (Rock-Eval Tmax) and calculated vitrinite reflectance (%Ro) were used to constrain the maximum burial depths and temperatures of three distinct intervals within the northern Permian Basin, USA. X-ray diffraction of clay fractions (<2 µm) consists of illite, chlorite, and illite-smectite intermediates. Primary clay mineral diagenetic changes progressively increase in ordering from R0 to R1 I-S between 2359.5 and 2485.9 m and the appearance of chlorite at 2338.7 m. Rock-Eval pyrolysis data show 0 to 14 wt% TOC, HI values of 40 to 520 mgHC/g TOC, and S2 values of 0 to 62 mg HC/g, with primarily type II kerogen with calculated %Ro within the early to peak oil maturation window. Evaluation of the potential for oil generation is relatively good throughout the Tonya 401 and JP Chilton wells. Organic maturation indices (Tmax, %Ro) and peak burial temperatures correlate well with clay mineral diagenesis (R0–R1 I-S), indicating that maximum burial depths and temperatures were between 2.5 and 4 km and <100 °C and 140 °C, respectively. Additionally, the use of clay mineral-derived temperatures provides insight into discrepancies between several calculated %Ro equations and thus should be further investigated for use in the Permian Basin. Accordingly, these findings show that clay mineral diagenesis, combined with other paleothermal proxies, can considerably improve the understanding of the complex burial history of the Permian Basin in the context of the evolution of the southern margin of Laurentia.

show abstract

Section: Introductionmentioning

confidence: 99%

Evaluation of Shale Source Rocks and Clay Mineral Diagenesis in the Permian Basin, USA: Inferences on Basin Thermal Maturity and Source Rock Potential

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…To this day, the thermal stability of smectites and their transition to illite appear uncertain due to the complications arising from the nature of these minerals (e.g., May et al, 1986). With regard to simple and nearly ideal clay minerals such as kaolinite, smectites are featured by (i) variations in mineral chemistry and crystallinity (e.g., Borchardt, 2018; Kloprogge et al, 1999; Zanoni et al, 2016), (ii) variations in particle size (Morris & Żbik, 2009), and (iii) mineral impurities, which may affect thermal dissolution dynamics (May et al, 1986). Nevertheless, Pytte and Reynolds (1989) and Pusch and Karnland (1996) provided further insights into the smectite‐to‐illite transition, stating that in metamorphic dikes, this process takes at least 10 3 years to complete at 250–400°C, whereas in sedimentary sequences, about 10 7 years are needed to produce illite at temperatures between 90°C and 230°C.…”

Section: Discussionmentioning

confidence: 99%

Raw material choices and material characterization of the 3^rd and 2^nd millennium BC pottery from the Petit‐Chasseur necropolis: Insights into the megalith‐erecting society of the Upper Rhône Valley, Switzerland

et al. 2021

Self Cite

View full text Add to dashboard Cite

Owing to its well‐preserved and long‐lasting archaeological record, the necropolis of Petit‐Chasseur in the Upper Rhône Valley (3100–1600 BC) showcases the economic, social, and ideological changes of 3rd and 2nd millennium BC Europe excellently. An in‐depth investigation of pottery artifacts was carried out using multiple spectroscopic and microscopic techniques. Nine types of ceramic fabrics were identified based on the variety of temper and natural inclusions; however, the mineralogy and phase chemistry of the ceramic matrix showed the paste to be primarily illitic or muscovitic, irrespective of the inclusion type. Muscovitic clays were likely procured from the fluvioglacial, glaciolacustrine, colluvial, and till sediment abundantly available at higher altitudes of the Upper Rhône Valley, whereas illitic clays were acquired from pedogenized loess horizons or the Rhône River alluvium. Different raw material choices and paste preparation practices suggest distinct ceramic traditions that likely existed in the valley during the 3rd and 2nd millennia BC. This, along with the hypothesized provenance of the raw material, is likely in favor of various prehistoric communities gathering at the megalithic necropolis from close and distant parts of the valley using the Petit‐Chasseur site as a place of assembly.

show abstract

“…XRD analyses further revealed the presence of chlorite-smectite and micasmectite (Fig. 3), both attributed to the opening of 10Å and 14Å phyllosilicates during low-temperature eogenetic alterations (Millot, 1971;Zanoni et al, 2016).…”

Section: Petrography and Mineral Chemistrymentioning

confidence: 99%

Middle Triassic high-K calc-alkaline effusive and pyroclastic rocks from the Zagorje-Mid-Transdanubian Zone (Mt. Kuna Gora; NW Croatia): mineralogy, petrology, geochemistry and tectonomagmatic affinity

Slovenec

Šegvić²

2021

GeA

Self Cite

View full text Add to dashboard Cite

This study uses mineralogical, petrological, geochemical, and Sr and Nd isotope data along with K-Ar ages to infer the petrogenesis and geodynamic evolution of Middle Triassic high-K calc-alkaline lavas and their associated pyroclastics of Mt. Kuna Gora in NW Croatia. Their analogue mineralogy and bulk-rock geochemistry testify to the coeval origin of both rock types. Sanidine and plagioclase accompanied by inor augite and Ti-bearing magnetite are the major phases found in a matrix of devitrified volcanic glass and plagioclase microlites. Hydrothermal anddiagenetic processes in the pyroclastics originated the formation of chlorite and white mica, and mixed-layer clay minerals, respectively. Petrography reveals the following crystallization order: spinel→clinopyroxene→plagioclase→alkali-feldspar±Fe-Ti oxides. Geochemical and isotopic data suggests that the studied rocks had a complex origin that included the contamination of subduction-generated magmas by lithospheric mantle melts. This presumes an interplay between fertile arc mantle, subducted continental crust, and depleted or ocean island basalts-like mantle. A low degree of crustal contamination stands as a last step in the formation of such “hybrid” magmas. The subducted Paleotethyan oceanic lithosphere went through processes of partial melting at depths of ~45-49km and pressures of ≤1.6GPa and fractionation that produced melts which gave rise to the studied rocks. In the model we are proposing herein such formed partial melts are related to the demise of the northward subduction of the Paleotethys oceanic lithosphere during the Early to Middle Triassic epoch, which is consistent with an active, ensialic mature volcanic arc developing along Laurussian southern active margins.

show abstract

Clay mineral diagenesis in Cretaceous clastic reservoirs from West African passive margins (the South Gabon Basin) and its impact on regional geology and basin evolution history

Cited by 27 publications

References 74 publications

Evaluation of Shale Source Rocks and Clay Mineral Diagenesis in the Permian Basin, USA: Inferences on Basin Thermal Maturity and Source Rock Potential

Evaluation of Shale Source Rocks and Clay Mineral Diagenesis in the Permian Basin, USA: Inferences on Basin Thermal Maturity and Source Rock Potential

Raw material choices and material characterization of the 3^rd and 2^nd millennium BC pottery from the Petit‐Chasseur necropolis: Insights into the megalith‐erecting society of the Upper Rhône Valley, Switzerland

Middle Triassic high-K calc-alkaline effusive and pyroclastic rocks from the Zagorje-Mid-Transdanubian Zone (Mt. Kuna Gora; NW Croatia): mineralogy, petrology, geochemistry and tectonomagmatic affinity

Contact Info

Product

Resources

About

Clay mineral diagenesis in Cretaceous clastic reservoirs from West African passive margins (the South Gabon Basin) and its impact on regional geology and basin evolution history

Cited by 27 publications

References 74 publications

Evaluation of Shale Source Rocks and Clay Mineral Diagenesis in the Permian Basin, USA: Inferences on Basin Thermal Maturity and Source Rock Potential

Evaluation of Shale Source Rocks and Clay Mineral Diagenesis in the Permian Basin, USA: Inferences on Basin Thermal Maturity and Source Rock Potential

Raw material choices and material characterization of the 3rd and 2nd millennium BC pottery from the Petit‐Chasseur necropolis: Insights into the megalith‐erecting society of the Upper Rhône Valley, Switzerland

Middle Triassic high-K calc-alkaline effusive and pyroclastic rocks from the Zagorje-Mid-Transdanubian Zone (Mt. Kuna Gora; NW Croatia): mineralogy, petrology, geochemistry and tectonomagmatic affinity

Contact Info

Product

Resources

About

Raw material choices and material characterization of the 3^rd and 2^nd millennium BC pottery from the Petit‐Chasseur necropolis: Insights into the megalith‐erecting society of the Upper Rhône Valley, Switzerland