Kübler Illite “Crystallinity” Index of the Cretaceous Gyeongsang Basin, Korea: Implications for Basin Evolution

Lee, Jae Il; Lee, Yong Il

doi:10.1346/ccmn.2001.0490103

Cited by 24 publications

(15 citation statements)

References 19 publications

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“…Clay minerals such as illite and chlorite have also been commonly used to quantify diagenetic and low-grade metamorphic conditions. In sedimentary rocks, the transition from smectite to illite and the measurement of illite crystallinity (IC) are among the most widely used methods to evaluate burial conditions (e.g., Kübler 1964;Frey 1987;Merriman et al 1995;Lee and Lee 2001;Schwartz et al 2009). Others have developed thermometers based on the chemical compositions of chlorite (Cathelineau and Nieva 1985;Cathelineau 1988;Hillier and Velde 1991;Vidal et al 2005and 2006and Inoue et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Formation of chlorite during thrust fault reactivation. Record of fluid origin and P–T conditions in the Monte Perdido thrust fault (southern Pyrenees)

Lacroix

Charpentier

Buatier

et al. 2012

Contrib Mineral Petrol

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The chemical and isotopic compositions of clay minerals such as illite and chlorite are commonly used to quantify diagenetic and low-grade metamorphic conditions, an approach that is also used in the present study of the Monte Perdido thrust fault from the South Pyrenean fold-and-thrust belt. The Monte Perdido thrust fault is a shallow thrust juxtaposing upper Cretaceous-Paleocene platform carbonates and Lower Eocene marls and turbidites from the Jaca basin. The core zone of the fault, about 6 m thick, consists of intensely deformed clay-bearing rocks bounded by major shear surfaces. Illite and chlorite are the main hydrous minerals in the fault zone. Illite is oriented along cleavage planes while chlorite formed along shear veins (\50 lm in thickness). Authigenic chlorite provides essential information about the origin of fluids and their temperature. d18 O and dD values of newly formed chlorite support equilibration with sedimentary interstitial water, directly derived from the local hanging wall and footwall during deformation. Given the absence of largescale fluid flow, the mineralization observed in the thrust faults records the P-T conditions of thrust activity. Temperatures of chlorite formation of about 240°C are obtained via two independent methods: chlorite compositional thermometers and oxygen isotope fractionation between cogenetic chlorite and quartz. Burial depth conditions of 7 km are determined for the Monte Perdido thrust reactivation, coupling calculated temperature and fluid inclusion isochores. The present study demonstrates that both isotopic and thermodynamic methods applied to clay minerals formed in thrust fault are useful to help constrain diagenetic and low-grade metamorphic conditions.

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Section: Introductionmentioning

confidence: 99%

Formation of chlorite during thrust fault reactivation. Record of fluid origin and P–T conditions in the Monte Perdido thrust fault (southern Pyrenees)

Lacroix

Charpentier

Buatier

et al. 2012

Contrib Mineral Petrol

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“…In the southern Korean Peninsula, located in the eastern margin of Asia, recent studies using these methods suggest that the Paleozoic (Ko & Lee 1991; Lee & Ko 1997) and Mesozoic basins (Park & Park 1988, 1989; Noh & Park 1990; Son et al . 1994; Choi & Kim 1997; Lee & Lee 2001; Noh & Choi 2001; Lim et al . 2003; Choi & Lee 2006) have experienced high‐grade diagenesis to very low‐grade metamorphism.…”

Section: Introductionmentioning

confidence: 99%

Thermal maturity assessment of the Upper Triassic to Lower Jurassic Nampo Group, mid‐west Korea: Reconstruction of thermal history

Egawa

Lee

2007

Island Arc

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Thermal maturity of the Upper Triassic to Lower Jurassic Nampo Group, a sediment‐fill of the Chungnam Basin located in the central western part of South Korea, was assessed by illite crystallinity measurement and sandstone microtexture analysis. The Nampo Group consists of a fluvio‐lacustrine deposit bearing meta‐anthracitic coals and was over‐thrusted by the basement rocks. Sandstones are characterized by down sequence increasing illite crystallinity, from anchizone to epizone, which is strongly suggestive of burial heating. Deep‐burial diagenesis and deformation are evidenced by well‐developed pressure solution textures, whose intensity tends to increase down sequence, and by ductile deformation in the lowermost strata. On the basis of the result of illite crystallinity measurement, the maximum paleo‐temperature and total burial depth of the Nampo Group are estimated to be ca 340°C and 10 km, respectively; these conditions are in good agreement with the observed ductile deformation features. The absence of strata younger than the Nampo Group in and around the Chungnam Basin suggests that deep burial of the Nampo Group was caused by tectonic crustal loading. The tectonic overload was because of basement over‐thrusting that occurred during the Jurassic Daebo orogeny, which is closely related to the orthogonal subduction of the Izanagi Plate beneath the East Asian continent. Subsequent hydrothermal alteration disturbed the thermal maturity pattern, resulting in anomalously high illite crystallinity and meta‐anthracitization.

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“…The major boundary fault of the half‐graben runs in the north–south direction (Fig. 7 in Lee & Lee 2001), and the fault‐bounded basement rocks on the eastern side can also act as provenance for basin‐filling sediments. This half‐graben is characterized by having the north–south fault as its western boundary (Lee & Lee 2000).…”

Section: Chemistry Of Chromian Spinel From Serpentinitesmentioning

confidence: 99%

Early Cretaceous paleogeography of Korea and Southwest Japan inferred from occurrence of detrital chromian spinels

et al. 2008

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The Sindong Group was deposited in the north-south trending half-graben Nakdong Trough, southern Korean peninsula. The occurrence of detrital chromian spinels from the Jinju Formation of the Sindong Group in the Gyeongsang Basin means that the mafic to ultramafic rocks were exposed in its provenance. The chromian spinels from the Jinju Formation are characterized by extremely low TiO 2 and Fe 3+ . Moreover, their range of Cr# is from 0.45 to 0.80 and makes a single trend with Mg#. The chemistry of chromian spinels implies that the source rocks for chromian spinels were peridotites or serpentinites, which originated in the mantle wedge. To more narrowly constrain their source rocks, the Ulsan and Andong serpentinites exposed in the Gyeongsang Basin were examined petrographically. Chromian spinels in the Andong serpentinite differ from those of the Jinju Formation and those in the Ulsan serpentinite partly resemble them. Furthermore, the Jinju chromian spinel suite is similar to the detrital chromian spinels from the Mesozoic sediments in the Circum-Hida Tectonic zone, which includes the Nagato Tectonic zone in Southwest Japan and the Joetsu Belt in Northeast Japan. This suggests that the basement rocks, which were located along the main fault bounding the eastern edge of the Nakdong Trough, had exposures of peridotite or serpentinite. It is possible that the Nakdong Trough was directly adjacent to the Circum-Hida Tectonic zone before the opening of the Sea of Japan (East Sea).

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Kübler Illite “Crystallinity” Index of the Cretaceous Gyeongsang Basin, Korea: Implications for Basin Evolution

Cited by 24 publications

References 19 publications

Formation of chlorite during thrust fault reactivation. Record of fluid origin and P–T conditions in the Monte Perdido thrust fault (southern Pyrenees)

Formation of chlorite during thrust fault reactivation. Record of fluid origin and P–T conditions in the Monte Perdido thrust fault (southern Pyrenees)

Thermal maturity assessment of the Upper Triassic to Lower Jurassic Nampo Group, mid‐west Korea: Reconstruction of thermal history

Early Cretaceous paleogeography of Korea and Southwest Japan inferred from occurrence of detrital chromian spinels

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