Polyphased Quartz Cementation and Its Sources: A Case Study from the Upper Palaeozoic Haushi Group Sandstones, Sultanate of Oman

Hartmann, Bernhard H.; Juhasz-Bodnar, Katalin; Ramseyer, Karl; Matter, Albert

doi:10.1002/9781444304237.ch17

Cited by 19 publications

(11 citation statements)

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“…The honeycomb porosity is clearly secondary and the timing of its creation is currently unknown. The composition and paragenesis of these Al Khlata sandstones appears comparable with that described by Hartmann et al (2000) for the salt basin areas of interior Oman, except for the rapid burial and subsequent rebound these rocks have experienced since the Late Cretaceous.…”

Section: Sedimentologysupporting

confidence: 57%

“…These features and its gradational passage into the overlying Saiq are evidence that the interval possibly represents the Upper Gharif. Middle and Upper Gharif sandstones are typically richer in feldspar than the Al Khlata (Hartmann et al 2000) and fossil wood is widespread in the uppermost Gharif in the Huqf outcrop area (Berthelin et al 2004;Heward & Al-Ja'aidi 2005;Matysová et al 2010). Shales with mature seasonal palaeosols and grey plant beds, typical of the Upper Gharif in interior Oman, are however absent.…”

Section: Other Outcrops In the Wadi Daiqa Inliermentioning

confidence: 99%

“…More recent publications on the outcropping and subsurface Al Khlata include those of AlBelushi et al (1996), Hartmann et al (2000), Osterloff et al (2004), Heward & Al-Ja'aidi (2005), Martin et al (2008Martin et al ( , 2012, Penney et al (2008Penney et al ( , 2011, Stephenson et al (2008) and Forbes et al (2010). Much unpublished work lies in oil industry well files and reports.…”

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confidence: 99%

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Al Khlata glacial deposits in the Oman Mountains and their implications

Heward¹,

Penney²

2014

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A thick succession of Al Khlata glacio-lacustrine deposits, including diamictites, crops out in the Wadi Daiqa inlier and there are other possible Al Khlata outcrops in Wadi Amdeh and Wadi al Arabiyin. These outcrops in the Oman Mountains are 100 km north of where the Al Khlata had been thought to pinch out by non-deposition or erosion. Fossil spores and pollen from Wadi Daiqa are highly carbonized having been subject to greenschist facies metamorphism, but are still clearly identifiable as taxa from the Late Carboniferous 2159A zone of the oil-producing areas of interior Oman. This northernmost Al Khlata is sand rich and interpreted to be glacio-lacustrine. Previously the sand-dominated Al Khlata successions north of the Central Oman High have been considered to be glacio-fluvial outwash largely based on their context. The Al Khlata deposits in Wadi Daiqa and the underlying several-kilometre-thick Amdeh succession are preserved in Saih Hatat, probably in a continuation of the Ghaba Salt Basin that itself overlies an accreted terrane from the Pan African orogeny.

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Section: Sedimentologysupporting

confidence: 57%

Section: Other Outcrops In the Wadi Daiqa Inliermentioning

confidence: 99%

mentioning

confidence: 99%

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Al Khlata glacial deposits in the Oman Mountains and their implications

Heward¹,

Penney²

2014

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“…These early features are indicative of semiarid to arid conditions during sedimentation (Walker, 1976;Wright, 1992). They are not present in the glaciogenic, continental A1 Khlata Formation (Ramseyer, 1983;Hartmann et al, 1999).…”

Section: Chemical Factorsmentioning

confidence: 99%

“…Diagenetic alterations of the sandstones within the Gharif Formation (Hartmann, 1996) and A1 Khlata Formation (Ramseyer, 1983;Hartmann et al, 1999) were studied. Because of the similar burial history, the burial diagenetic alterations are comparable within the generalized paragenetic sequence for the two formations ( Figure 9).…”

Section: Chemical Factorsmentioning

confidence: 99%

Effect of Permo-Carboniferous Climate on Illite-Smectite, Haushi Group, Sultanate of Oman

Hartmann

Juhasz-Bodnar

Ramseyer

et al. 1999

Clays and clay miner.

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Abstract--The Late Westphalian to Artinskian Haushi Group in the Sultanate of Oman consists of the glaciogenic A1 Khlata Formation and the Gharif Formation which contains marginal marine, coastal plain, and fluvial sediments. The sequence was deposited during a global-warming event following the PermoCarboniferous glaciation of Gondwana. Because of a varied subsidence history, these sediments range from the surface in the SE to almost 5000 m in the NW of the basin.Mixed-layer illite-smectite (I-S) is an important constituent of the <2 p,m size fraction of sandstone and shale samples in both formations at all depths. Different starting compositions lead to three distinct trends of illite layers in I-S versus temperature for different sedimentary environments and paleoclimatic conditions. The starting compositions of I-S at the surface range from an ordered I-S in the A1 Khlata Formation to smectite-rich in the Upper+Middle Gharif members.Physical, chemical and environmental factors were investigated as causes for the different starting compositions of I-S. Both formations share an identical burial history, paragenesis, thermal evolution, and source of detrital material. They differ only in environmental conditions during sedimentation. Thus, the variation in starting composition of I-S appears to be best explained by distinct weathering conditions during sedimentation of the three units. In particular, the expected low intensity of chemical weathering during glaciogenic conditions is marked by the presence of higher amounts of unstable volcanic and sedimentary rock fragments in the A1 Khlata Formation.

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