Clay Mineral Diagenesis in Argillaceous Sediments and Rocks

Aoyagi, Koichi; Chilingarian, George V.; Yen, Teh Fu

doi:10.1080/00908318708908687

Cited by 7 publications

(6 citation statements)

References 28 publications

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“…Possibility (5) can be ruled out, or at least minimized, partly because the sediments at Sites 798 and 799 are dominated with biosiliceous and calcareous components. Also, the transformation of swelling clay minerals to non-swelling clays in Neogene sediments of northern Japan has been found to occur at about 100°C (Aoyagi et al, 1987). Clay transformations at such high temperatures would not significantly change δ 18 θ of the water (Lawrence, 1973).…”

Section: Sampling and Analysismentioning

confidence: 99%

Causes of the Oxygen Isotopic Depletion of Interstitial Waters from Sites 798 and 799, Japan Sea, Leg 128

Matsumoto¹

1992

Proceedings of the Ocean Drilling Program

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Oxygen isotope compositions of the interstitial waters have been measured for 21 samples taken from the depth intervals of 1.5 to 398.9 mbsf at Site 798 (Oki Ridge) and 16.5 to 435.6 mbsf at Site 799 (Kita-Yamato Trough) in Japan Sea. The δ 18 θ values decrease with depth from -0.49 to -3.38 o/ oo (SMOW) at Site 798 and from -0.71 to -4.36 o/ oo (SMOW) at Site 799 corresponding to an average depletion gradient of-0.8 o/ oo per 100 m. Material balance calculations reveal that the δ 18 θ-variations at Sites 798 and 799 were principally controlled by low-temperature alteration of basement basalt and andesite, resulting in negative shifts in pore water δ18 O values, and by the polymorphic transformations of biogenic opal-A to opal-CT and opal-CT to microquartz, which tend to increase δ 18 θ of interstitial waters. Carbonate diagenesis and ash alteration also caused weakly negative shifts in pore water δ 18 θ values.

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Section: Sampling and Analysismentioning

confidence: 99%

Causes of the Oxygen Isotopic Depletion of Interstitial Waters from Sites 798 and 799, Japan Sea, Leg 128

Matsumoto¹

1992

Proceedings of the Ocean Drilling Program

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“…In sediment diagenesis, constituent minerals pass through several phases: e.g., smectite transforms to a mica (illite) through a smectite/mica mixed layered mineral (e.g., Velde et al 1986, Inoue 1991, Aoyagi and Shimoda 1991, and clinoptilolite, a zeolite, transform to albite through analcime (e.g., Boles 1971, Utada 1985, Iijima 1986, Sasaki 1991. Many workers have experimentally studied the illitization of smectite and the transformations of zeolite (e.g., Boles 1971, Eberl 1976, Eberl et al 1978, Colten 1986, Yau et al 1987, Whitney 1990, Yamada et al 1991, Chermak 1993.…”

Section: Introductionmentioning

confidence: 99%

Alteration of Smectite in a System Including Alanine at High Pressure and Temperature

Hashizume

Yamada

Nakazawa

1995

Clays and clay miner.

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Abstract--Transformation of montmorillonite was experimentally investigated using a model system of montmorillonite-alanine at 100 MPa and up to 500"C. Sodium-montmorillonite changed to a mixed layer mineral of sodium-and ammonium-montmorillonites (Na/NH4-Mnt) in the temperature range from 150 to 4000C. Ammonium ions were the decomposition product of alanine above 150"C. The Na/NH4-Mn*. transformed to regularly and randomly interstratified minerals of NH4-montmorillonite and NH4-mica (o. NH4-Mnt/NH4-Mic and d. NH4-Mnt/NH4-Mic) at 400"C. These mixed layered minerals transformed to ammonium-mica at 5000C. Ammonium-analcime appeared and coexisted with the smectites at temperatures over 200"C, and with albite for those over 400"C.In comparison with the results of previous experiments in which there was no organic component, the present results revealed that (1) some uncommon mineral phases appeared by replacement of sodium ions in montmoriltonite with ammonium ions, i.e., NH4-Mic, o. and d. NH4-Mnts, o. and d. NH4-Mnt/ NH4-Mics, and (2) ammonium-analcime appeared. The mineral assemblages and alteration sequences correspond better with those observed in the natural system than those known from experimental results in aluminosilicate-water system.

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“…Aoyagi (1978) mentioned that in the compression of montmorillonite clay, there is a transitional state at a porosity of 30z, which is close to the emin for this stage. Thus, the emin is the void ratio where the deformation will stop immediately during continuous compression loading.…”

Section: Transition At a Low Void Ratio And High Pressurementioning

confidence: 99%

“…17. The data were obtained from the marine deposited soil of North Hokkaido (Aoyagi, 1978). The lines indicated in Fig.…”

Section: Transition At a Low Void Ratio And High Pressurementioning

confidence: 99%

Equations of State in Soil Compression Based on Statistical Mechanics

Fukue

Mulligan

2009

Soils and Foundations

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Clay Mineral Diagenesis in Argillaceous Sediments and Rocks

Cited by 7 publications

References 28 publications

Causes of the Oxygen Isotopic Depletion of Interstitial Waters from Sites 798 and 799, Japan Sea, Leg 128

Causes of the Oxygen Isotopic Depletion of Interstitial Waters from Sites 798 and 799, Japan Sea, Leg 128

Alteration of Smectite in a System Including Alanine at High Pressure and Temperature

Equations of State in Soil Compression Based on Statistical Mechanics

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