Parh Group basalts of northeastern Balochistan, Pakistan: Precursors to the Deccan Traps

Khan, Wazir; McCormick, George R.; Reagan, Mark K.

doi:10.1130/0-8137-2328-0.59

Cited by 8 publications

(6 citation statements)

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“…Several geochemical features of these arc volcanic rocks resemble those of the Late Cretaceous volcanic rocks of the Ladakh and Kohistan arcs of NW Himalaya where basalts and basaltic andesites have typical REE and HFSE characteristics of island arcs (Rolland et al, 2000(Rolland et al, , 2002Hou et al, 2004;Ahmad et al, 2005). The Parh group of volcanic rocks of northwestern Baluchistan are interpreted to be precursors of Deccan Traps and represent lavas from the Reunion hotspot (Wazir Khan et al, 1999). In the Tethyan ophiolites, island arc volcanics are associated with OIB type-hotspot lavas (Islam et al, 2003;Ahmad et al, 1996).…”

Section: Discussionmentioning

confidence: 97%

Geochemistry of the NeoArchaean high-Mg basalts, boninites and adakites from the Kushtagi–Hungund greenstone belt of the Eastern Dharwar Craton (EDC); implications for the tectonic setting

Naqvi

Khan

Manikyamba

et al. 2006

Journal of Asian Earth Sciences

105

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Section: Discussionmentioning

confidence: 97%

Geochemistry of the NeoArchaean high-Mg basalts, boninites and adakites from the Kushtagi–Hungund greenstone belt of the Eastern Dharwar Craton (EDC); implications for the tectonic setting

Naqvi

Khan

Manikyamba

et al. 2006

Journal of Asian Earth Sciences

105

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“…The total DT eruptive sequence lasted about 10 Ma, with the oldest alkalic lava flows in Pakistan around 72–73 Ma (Khan et al., 1999; Mahoney et al., 2002), and the youngest lava flows around 60–61 Ma in the Mumbai sequence (Pande et al., 2017; Sheth et al., 2001a, 2001b). However, the majority (

> 90\%

) of volcanism occurred during a ∼1 Ma time‐interval from 66.3 to 65.3 Ma (Parisio et al., 2016; Renne et al., 2015; Schoene et al., 2015, 2019; Sprain et al., 2019).…”

Section: Observational Constraints On Eruptive Tempomentioning

confidence: 99%

The Magmatic Architecture of Continental Flood Basalts I: Observations From the Deccan Traps

2021

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“…Late Cretaceous Parh Group: in central part of E-W outcrop belt, lava flows mostly restricted to basal portion of sections (up to 1.5 km thick); bulk of sequence consists of volcaniclastic deposits commonly interbedded with lava flows & limestone units. Western & eastern exposures contain more lava flows, but still dominated by volcaniclastic deposits (Khan et al, 1999). …”

Section: -Local Phreatomagmatic Activity?mentioning

confidence: 99%

Mafic volcaniclastic deposits in flood basalt provinces: A review

Ross

Ukstins

McClintock

et al. 2005

Journal of Volcanology and Geothermal Research

137

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Flood volcanic provinces are assumed generally to consist exclusively of thick lavas and shallow intrusive rocks (mostly sills), with any pyroclastic rocks limited to silicic compositions. However mafic volcaniclastic deposits (MVDs) exist in many provinces, and the eruptions that formed such deposits are potentially meaningful in terms of potential atmospheric impacts and links with mass extinctions. The province where MVDs are the most voluminousthe Siberian Traps -is also the one temporally associated with the greatest Phanerozoic mass extinction. A lot remains to be learned about these deposits and eruptions before a convincing genetic link can be established, but as a first step, this contribution reviews in some detail the current knowledge on MVDs for the provinces in which they are better known, i.e. the North Atlantic Igneous Province (including Greenland, the Faeroe Islands, the British Isles, and tephra layers in the North Sea basin and vicinity), the Ontong Java plateau, the Ferrar, and the Karoo. We also provide a brief overview of what is known about MVDs in other provinces such as the Columbia River Basalts, the Afro-Arabian province, the Deccan Traps, the Siberian Traps, the Emeishan, and an Archean example from Australia. The thickest accumulations of MVDs occur in flood basalt provinces where they underlie the lava pile (Faeroes: >1 km, Ferrar province: ≥400 m, Siberian Traps: 700 m). In the Faeroes case, the great thickness of MVDs can be attributed to accumulation in a local sedimentary basin, but in the Ferrar and Siberian provinces the deposits are widespread (>3 x 10 5 km 2 for the latter). On the Ontong Java plateau over 300 m of MVDs occur in one drill hole without any overlying lavas. Where the volcaniclastic deposits are sandwiched between lavas, their thickness is much less. In most of the cases reviewed, primary MVDs are predominantly of phreatomagmatic origin, as indicated by the clast assemblage generally consisting of basaltic clasts of variable vesicularity (dominantly non-to poorly-vesicular) mixed with abundant country rock debris. The accidental lithic components often include loose quartz particles derived from poorly consolidated sandstones in underlying sedimentary basins (East Greenland, Ferrar, Karoo). These underlying sediments or sedimentary rocks were not only a source for debris but also aquifers that supplied water to fuel phreatomagmatic activity. In the Paraná-Etendeka, by contrast, the climate was apparently very dry when the lavas were emplaced (aeolian sand dunes) and no MVDs are reported. Volcanic vents filled with mafic volcaniclastic material, a few tens of metres to about 5 km across, are documented in several provinces (Deccan, North Atlantic, Ferrar, Karoo); they are though to have been excavated in relatively soft country rocks (rarely in flood lavas) by phreatomagmatic activity in a manner analogous to diatreme formation.

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Parh Group basalts of northeastern Balochistan, Pakistan: Precursors to the Deccan Traps

Cited by 8 publications

References 0 publications

Geochemistry of the NeoArchaean high-Mg basalts, boninites and adakites from the Kushtagi–Hungund greenstone belt of the Eastern Dharwar Craton (EDC); implications for the tectonic setting

Geochemistry of the NeoArchaean high-Mg basalts, boninites and adakites from the Kushtagi–Hungund greenstone belt of the Eastern Dharwar Craton (EDC); implications for the tectonic setting

The Magmatic Architecture of Continental Flood Basalts I: Observations From the Deccan Traps

Mafic volcaniclastic deposits in flood basalt provinces: A review

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