Spatial and temporal distribution of diagenetic alterations in siliciclastic rocks: implications for mass transfer in sedimentary basins

Morad, S.; Ketzer, João Marcelo Medina; Ros, Luiz Fernando De

doi:10.1046/j.1365-3091.2000.00007.x

Cited by 590 publications

(454 citation statements)

References 127 publications

(219 reference statements)

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“…This stage of illitization could result from the burial tem per a ture (about 180-200°C;Polastro, 1993;Šucha et al, 1993). How ever, we do not in fer that the stud ied sed i ments ex pe ri enced late diagenesis be cause of the pres ence of berthierine which is a typ i cal min eral of very early diagenesis (Odin et al, 1988;Morad et al, 2000). It is transformed to chamosite at tem per a ture over 70°C (Hill ier, 1994;Hornibrook and Longstaffe, 1996).…”

Section: Burial History and Palaeo-reconstructionmentioning

confidence: 83%

“…Berthierine forms in shal low-wa ter mar ginal ma rine or estuarine and deltaic sed i ments in a warm sub trop i cal cli mate (Odin et al, 1988;Weaver, 1989;Hornibrook and Longstaffe, 1996;Morad et al, 2000). It re quires an iron sup ply and anoxic con di tions, but they should be mar gin ally more oxic than the en vi ron ment in which sid er ite pre cip itates.The amount of sid er ite (39 wt.%; Ta ble 4, Fig.…”

Section: Burial History and Palaeo-reconstructionmentioning

confidence: 99%

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Latest Triassic climate humidification and kaolinite formation (Western Carpathians, Tatric Unit of the Tatra Mts)

Lintnerová¹,

Michalı́k²,

Uhlík³

et al. 2013

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The Tomanová For ma tion, of Rhaetian age, over ly ing the Norian Carpathian Keuper in the Tatra Mts. is built of cy clic parasequences of mudstones and sand stones. Quartz (15 to 70 wt.%), kaolinite (13 to 46 wt.%) and 2:1 Al dioctahedral phyllosilicates (dioct 2:1: mus co vite, illite, illite/smectite: 5 to 39 wt.%) rep re sent the ma jor min eral phase. The kaolinite/dioct 2:1 ra tio de creases up wards in the sec tion (from 4.3 to 0.5) and sig nals vari abil ity in weath er ing/ero sion in ten sity and changing wa ter sa lin ity. Ma jor and trace el e ments (LILE, HSFS, REE) in di cate a uni form source -fel sic rocks lo cated prob a bly in the Vindelician High lands. The sed i men ta tion rate (83 mm/ky) was con trolled by cli mate. Al ter na tion of dry and hu mid pe riods is refered by sed i men tary tex tures and by ma tu rity of quartz (ae olian vs. flu vial grains), and or ganic mat ter con tent and com po si tion (C org and d 13 C org ). Authigenic sid er ite or bethierine doc u ments wet and re duced con di tions in the up per part of the Tomanová For ma tion. The sedimention rate of the ma rine Dudzinec For ma tion at tained 25 mm/ka and the char ac ter of cy cles pre served in the se quence is sim i lar as that of the Tomanová For ma tion (fin ing up wards parasequences). How ever, the dif fer ent clay min er al ogy, the re cy cled char ac ter of the sil i cates, the dif fer ent d 13 C org and el e vated imput of car bon ate detri tus with spe cific C and O iso to pic pat terns doc u ment a dis con ti nu ity in the sec tion. The transgressive char ac ter of the Dudzinec Fm. was de duced from the strati graphic dis tri bu tion and en vi ron men tal char ac ter is tics of the ben thic foraminifera pres ent. Involutinids and spirillinids dom i nate in the lower part, endothyrinids gov ern the mid dle part, and in the up per part nodosariids and Ammodiscus-type micro fauna oc cur. These age-di ag nos tic microfossils in di cate a late Rhaetian age. Sea level rise in the Tatric Zone trig gered by ther mal ex pan sion of the Cen tral At lan tic Rift was grad ual, be ing af fected by in put of ter res trial clastic sed i ment both by fresh wa ter and by wind. The Tatric Tri as sic se quence in the West ern Carpathians helps un der stand ing of the de vel op ment of sed i men ta tion, palaeoclimate (kaolinite weath er ing), and palaeo ge ogra phy of the north ern most Tethyan Do main.

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Section: Burial History and Palaeo-reconstructionmentioning

confidence: 83%

Section: Burial History and Palaeo-reconstructionmentioning

confidence: 99%

Latest Triassic climate humidification and kaolinite formation (Western Carpathians, Tatric Unit of the Tatra Mts)

Lintnerová¹,

Michalı́k²,

Uhlík³

et al. 2013

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“…Para Morad et al (2000), a separação entre os regimes eo e mesodiagenético ocorre em condições encontradas a aproximadamente 2000 m de profundidade de soterramento e temperatura de cerca de 70 o C, situação em que se avolumam as transformações químicas nos minerais.…”

Section: Resultsunclassified

Diagênese de arenitos da Formação Tatuí no estado de São Paulo

Barbosa-Gimenez

Caetano-Chang

2010

RBG

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Resumo A análise petrológica de arenitos da Formação Tatuí, por meio de métodos de microscopia ópti-ca e catodoluminescência, permitiu o entendimento da evolução diagenética a que foram submetidos esses depósitos. Neste estudo, foram utilizadas amostras de testemunhos de sondagem de poços perfurados no estado de São Paulo, além de algumas coletadas em afloramentos. A história diagenética dos arenitos da unidade desenvolveu-se nos regimes eodiagenético e mesodiagenético; os arenitos próximos à superfície foram submetidos também ao regime telodiagenético. O regime eodiagenético foi marcado por substituição de bioclastos (carapaças calcárias de bivalves), dissolução de minerais instáveis e precipitação de cimentos de calcita microcristalina, pirita, feldspato potássico e óxidos de ferro. Durante a mesodiagênese, o soterramento e a compactação mecânica tornaram-se mais efetivos, desencadeando várias fases diagenéticas, representadas por crescimento secundário de quartzo e plagioclásios, cimentação por calcita poiquilotópica e em mosaicos, cimentação por dolomita (pura, ferrosa e anquerita), dissolução de calcita e feldspato, precipitação de caulinita e calcita tardia, albitização de feldspatos, precipitação de zeólitas, cimentação por anidrita,anatásio e sílica. Os arenitos submetidos ao ambiente telodiagenético apresentam quantidades razoáveis de cimento ferruginoso e caulinita, feições de dissolução em feldspatos e ausência de cimento carbonático. Grande do Sul. Petrologic analysis of Tatuí Formation sandstones using optical microscopy and catodoluminescence provided the understanding of their diagenetic evolution. These studies were carried on samples from well cores and outcrops in São Paulo State. During the eogenetic regime the sediments undergone processes such as replacement of bioclasts (calcareous shells of bivalves), unstable minerals dissolution and cement precipitation of microcrystalline calcite, pirite, K-feldspar, and Fe-oxides. Mesogenetic regime was characterized by mechanical compaction, quartz and plagioclase overgrowths, poikilotopic and mosaic calcite cementation, dolomite through ankerite cementation, followed by calcite and feldspar dissolution, precipitation of kaolinite and late calcite, albitization of feldspars, precipitation of zeolite, anhydrite, anatase and silica. Sandstones submitted to telodiagenesis show high ferruginous and kaolinite cement, feldspar dissolution and absence of calcite cement. Palavras-chave:

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“…Also, geo chem i cal stud ies such as Estupinan et al (2007) in flu vial en vi ron ments showed that the pre cip i ta tion sid er ite as an early diagenetic min eral is com pat i ble with a low Sr con tent. Other au thors (e.g., Mozley, 1989;Morad, 1998;Morad et al, 2000;Estupinan et al, 2007) in di cated the pre cip i ta tion of sid er ite dur ing early diagenesis in flu vial en vi ronments is char ac ter ized by high FeCO 3 and low MnCO 3 .…”

Section: Ta Blementioning

confidence: 99%

The influence of diagenetic alterations on porosity in the Triassic Narrabeen Group, Southern Sydney Basin, Australia

Gahtani¹

2013

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The in flu ence of diagenetic al ter ations on po ros ity in the Tri as sic Narra been Group, South ern Syd ney Ba sin, Aus tra lia Pe trog ra phy of the Tri as sic Narra been Group (South ern Syd ney Ba sin of Aus tra lia) was de scribed by thin sec tion, scan ning elec tron mi cro scope and X-ray dif frac tion tech niques. Sand stone com po si tion in cludes mostly lithic grains with mi nor quartz, feld spar, mica and heavy min er als; litharenites and sublitharenites are com mon and quartzarenites are rare. Quartz in cludes monocrystalline and polycrystalline grains while the feld spar in cludes both K-feld spar and plagioclase. Vol ca nic, sed i mentary and chert rock frag ments are pres ent. In thin sec tion po ros ity is vis i ble in all units, par tic u larly the coarse-grained de posits. Sec ond ary po ros ity is greater than the pri mary po ros ity. The diagenetic al ter ations in clude com pac tion, quartz overgrowths, authigenic clay min er als, car bon ate ce ment and authigenic feld spar. Com pac tion oc curred in all units dur ing diagenesis. Both early and late diagenetic car bon ate ce ment is im por tant in the Narra been Group. Pore-fill ing car bon ate cement re duced po ros ity whereas dis so lu tion of car bon ate re sulted in sec ond ary po ros ity. Authigenic clay min er als are widespread in all units fill ing pores and oc cur ring as grain-coat ings on de tri tal and authigenic grains. Where they coat quartz grains they pre serve po ros ity by pre vent ing growth of quartz overgrowths. Dis so lu tion of un sta ble feld spar and lithic grains pro vided sec ond ary po ros ity. In the Narra been Group, shale and siltstone are abun dant in the Wom barra Claystone, Stanwell Park Claystone, Bald Hill Claystone and New port For ma tion, form ing lithological seals and con fin ing lay ers. Mi nor sandstone beds oc cur in the Wom barra Claystone and con tain more po ros ity. Me dium-and coarse-grained sand stone is com mon in the Coal cliff Sand stone, Scarborough Sand stone and Bulgo Sand stone and shows low to mod er ate po ros ity. Thus, these sand stone units prob a bly con tain gas or wa ter.Key words: pe trog ra phy, diagenesis, pri mary po ros ity, sec ond ary po ros ity, quartz over growth, car bon ate ce ment. INTRODUCTIONIn the Syd ney Ba sin (Aus tra lia), the Narra been Group is the low er most of three Tri as sic rock units and is lo cated be tween the Up per Perm ian Illa warra Coal Mea sures and the Hawkesbury Sand stone (Ward, 1971a). Fine-grained sed i ment in the Narra been Group was pre vi ously stud ied by sev eral authors (e.g., Baker, 1956;Loughnan et al., 1964Loughnan et al., , 1974Goldbery and Hol land, 1973;Retallack, 1977). Ward (1972) noted quartzose, quartz-lithic and vol ca nic sand stones as the three sed i ment suites in the Narra been Group. Prov e nance mark ers of fore land ba sin-fill sed i ments were de ter mined by Cow an (1993). The com po si tion and tex ture of the Narra been Group were de scribed by McElroy (1954). De scrip tions of the pe trology in the N...

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Spatial and temporal distribution of diagenetic alterations in siliciclastic rocks: implications for mass transfer in sedimentary basins

Cited by 590 publications

References 127 publications

Latest Triassic climate humidification and kaolinite formation (Western Carpathians, Tatric Unit of the Tatra Mts)

Latest Triassic climate humidification and kaolinite formation (Western Carpathians, Tatric Unit of the Tatra Mts)

Diagênese de arenitos da Formação Tatuí no estado de São Paulo

The influence of diagenetic alterations on porosity in the Triassic Narrabeen Group, Southern Sydney Basin, Australia

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