scholarly journals Morphology and stratigraphy of Serra Geral silicic lava flows in the northern segment of the Torres Trough, Paraná Igneous Province

2018 ◽  
Vol 48 (2) ◽  
pp. 201-219 ◽  
Author(s):  
Marcell Leonard Besser ◽  
Eleonora Maria Gouvea Vasconcellos ◽  
Antonio José Ranalli Nardy
Keyword(s):  
Lava Flows ◽  
Silicic Lava ◽  
Igneous Province ◽  
Northern Segment

scholarly journals Stratigraphy and age of Karoo basalts of Lesotho and implications for correlations within the Karoo igneous province. Roma Section.xls

2020 ◽  
Author(s):  
Julian S Marsh ◽  
Peter R Hooper ◽  
Jakub Rehacek ◽  
Robert A. Duncan ◽  
Alasdair R. Duncan
Keyword(s):  
Geographical Distribution ◽  
Southern Africa ◽  
Lava Flows ◽  
Golden Gate ◽  
Basalt Lava ◽  
Data Set ◽  
Stratigraphic Subdivision ◽  
Short Period ◽  
Igneous Province ◽  
Lava Pile

The Lesotho remnant contains the type succession for Karoo low-Ti basalts of central southern Africa. The <sup>40</sup>Ar/<sup>39</sup>Ar dating indicates that the sequence was emplaced within a very short period at about 180 Ma and consists of a monotonous pile of compound basalt lava flows which lacks significant palaeosols and persistent sedimentary intercalations. We have used geochemistry to establish a stratigraphic subdivision of the lava pile. Thin units of basalt flows, the Moshesh's Ford, Golden Gate, Sani, Roma, Letele, and Wonderkop units, with diverse geochemical character and restricted geographical distribution, are present at the base of the succession. These are overlain by extensive units of compositionally more uniform basalt, the Mafika Lisiu, Maloti, Senqu and Mothae units, which build the bulk of the sequence.<p>Location of this section is described in Marsh et al. (1997) AGU Geophysical Monograph, 100, 247-272.</p> <div>Title of data set: Roma Section </div>

scholarly journals Stratigraphy and age of Karoo basalts of Lesotho and implications for correlations within the Karoo igneous province. Sani Pass.xls

2020 ◽  
Author(s):  
Julian S Marsh ◽  
Peter R Hooper ◽  
Jakub Rehacek ◽  
Robert A. Duncan ◽  
Alasdair R. Duncan
Keyword(s):  
Geographical Distribution ◽  
Southern Africa ◽  
Lava Flows ◽  
Golden Gate ◽  
Basalt Lava ◽  
Data Set ◽  
Stratigraphic Subdivision ◽  
Short Period ◽  
Igneous Province ◽  
Lava Pile

The Lesotho remnant contains the type succession for Karoo low-Ti basalts of central southern Africa. The <sup>40</sup>Ar/<sup>39</sup>Ar dating indicates that the sequence was emplaced within a very short period at about 180 Ma and consists of a monotonous pile of compound basalt lava flows which lacks significant palaeosols and persistent sedimentary intercalations. We have used geochemistry to establish a stratigraphic subdivision of the lava pile. Thin units of basalt flows, the Moshesh's Ford, Golden Gate, Sani, Roma, Letele, and Wonderkop units, with diverse geochemical character and restricted geographical distribution, are present at the base of the succession. These are overlain by extensive units of compositionally more uniform basalt, the Mafika Lisiu, Maloti, Senqu and Mothae units, which build the bulk of the sequence.<p>Location of this section is described in Marsh et al. (1997) AGU Geophysical Monograph, 100, 247-272.</p> <div>Title of data set: Sani Pass </div>

scholarly journals Stratigraphy and age of Karoo basalts of Lesotho and implications for correlations within the Karoo igneous province. Springbok Flats.xls

2020 ◽  
Author(s):  
Julian S Marsh ◽  
Peter R Hooper ◽  
Jakub Rehacek ◽  
Robert A. Duncan ◽  
Alasdair R. Duncan
Keyword(s):  
Lava Flows ◽  
Golden Gate ◽  
Basalt Lava ◽  
Pb Isotope ◽  
Data Set ◽  
Volcanic Sequence ◽  
Stratigraphic Subdivision ◽  
Short Period ◽  
Igneous Province ◽  
Lava Pile

The Lesotho remnant contains the type succession for Karoo low-Ti basalts of central southern Africa. The <sup>40</sup>Ar/<sup>39</sup>Ar dating indicates that the sequence was emplaced within a very short period at about 180 Ma and consists of a monotonous pile of compound basalt lava flows which lacks significant palaeosols and persistent sedimentary intercalations. We have used geochemistry to establish a stratigraphic subdivision of the lava pile. Thin units of basalt flows, the Moshesh's Ford, Golden Gate, Sani, Roma, Letele, and Wonderkop units, with diverse geochemical character and restricted geographical distribution, are present at the base of the succession. These are overlain by extensive units of compositionally more uniform basalt, the Mafika Lisiu, Maloti, Senqu and Mothae units, which build the bulk of the sequence.<p>Location of this section is described in Marsh et al. (1997) AGU Geophysical Monograph, 100, 247-272.</p> <p>Title of data set: Springbok Flats</p> <p>Location of Borehole RL1 (SF samples) – S24.9367 deg; E 28.3750 deg</p> <p>Location of Borehole RTL1 – S 24.4400 deg; E 29.1767 deg</p> <p>Location of Borehole WD4 – S 24.6483 deg; E 28.7450 deg</p> <p>Location of Borehole LB1 – S 24.8817 deg; E 28.5833 deg</p> <p>Borehole TF2 – base of volcanic sequence – 768m</p> <p>Borehole TF1 – base of volcanic sequence – 357m</p> <div>All Sr-, Nd- and Pb-isotope values are MEASURED values. </div>

Feeder systems of acidic lava flows from the Paraná-Etendeka Igneous Province in southern Brazil and their implications for eruption style

2018 ◽  
Vol 81 ◽  
pp. 1-9 ◽  
Author(s):  
Evandro Fernandes de Lima ◽  
Breno Leitão Waichel ◽  
Lucas De Magalhães May Rossetti ◽  
Carlos Augusto Sommer ◽  
Matheus Silva Simões
Keyword(s):  
Lava Flows ◽  
Southern Brazil ◽  
Eruption Style ◽  
Igneous Province

scholarly journals Stratigraphy and age of Karoo basalts of Lesotho and implications for correlations within the Karoo igneous province. Semongkong Section.xls

2020 ◽  
Author(s):  
Julian S Marsh ◽  
Peter R Hooper ◽  
Jakub Rehacek ◽  
Robert A. Duncan ◽  
Alasdair R. Duncan
Keyword(s):  
Geographical Distribution ◽  
Southern Africa ◽  
Lava Flows ◽  
Golden Gate ◽  
Basalt Lava ◽  
Data Set ◽  
Stratigraphic Subdivision ◽  
Short Period ◽  
Igneous Province ◽  
Lava Pile

The Lesotho remnant contains the type succession for Karoo low-Ti basalts of central southern Africa. The <sup>40</sup>Ar/<sup>39</sup>Ar dating indicates that the sequence was emplaced within a very short period at about 180 Ma and consists of a monotonous pile of compound basalt lava flows which lacks significant palaeosols and persistent sedimentary intercalations. We have used geochemistry to establish a stratigraphic subdivision of the lava pile. Thin units of basalt flows, the Moshesh's Ford, Golden Gate, Sani, Roma, Letele, and Wonderkop units, with diverse geochemical character and restricted geographical distribution, are present at the base of the succession. These are overlain by extensive units of compositionally more uniform basalt, the Mafika Lisiu, Maloti, Senqu and Mothae units, which build the bulk of the sequence. <div><p>Location of this section is described in Marsh et al. (1997) AGU Geophysical Monograph, 100, 247-272.</p> <p>Title of data set: Semongkong Section</p> <p>This section is entirely located in the Lesotho Formation and does not go down to the Clarens Formation contact with the base of the volcanic sequence.</p><br></div>

scholarly journals Stratigraphy and age of Karoo basalts of Lesotho and implications for correlations within the Karoo igneous province. Mafika Lisiu Pass.xls

2020 ◽  
Author(s):  
Julian S Marsh ◽  
Peter R Hooper ◽  
Jakub Rehacek ◽  
Robert A. Duncan ◽  
Alexander R. Duncan
Keyword(s):  
Geographical Distribution ◽  
Southern Africa ◽  
Lava Flows ◽  
Golden Gate ◽  
Basalt Lava ◽  
Data Set ◽  
Stratigraphic Subdivision ◽  
Short Period ◽  
Igneous Province ◽  
Lava Pile

The Lesotho remnant contains the type succession for Karoo low-Ti basalts of central southern Africa. The <sup>40</sup>Ar/<sup>39</sup>Ar dating indicates that the sequence was emplaced within a very short period at about 180 Ma and consists of a monotonous pile of compound basalt lava flows which lacks significant palaeosols and persistent sedimentary intercalations. We have used geochemistry to establish a stratigraphic subdivision of the lava pile. Thin units of basalt flows, the Moshesh's Ford, Golden Gate, Sani, Roma, Letele, and Wonderkop units, with diverse geochemical character and restricted geographical distribution, are present at the base of the succession. These are overlain by extensive units of compositionally more uniform basalt, the Mafika Lisiu, Maloti, Senqu and Mothae units, which build the bulk of the sequence.<div><p>Location of this section is described in Marsh et al. (1997) AGU Geophysical Monograph, 100, 247-272.</p> <p>Title of data set: Mafika Lisiu Pass section.</p><br></div>

scholarly journals Stratigraphy and age of Karoo basalts of Lesotho and implications for correlations within the Karoo igneous province. Ongeluksnek Pass.xls

2020 ◽  
Author(s):  
Julian S Marsh ◽  
Peter R Hooper ◽  
Jakub Rehacek ◽  
Robert A. Duncan ◽  
Alasdair R. Duncan
Keyword(s):  
Geographical Distribution ◽  
Southern Africa ◽  
Lava Flows ◽  
Golden Gate ◽  
Basalt Lava ◽  
Data Set ◽  
Stratigraphic Subdivision ◽  
Short Period ◽  
Igneous Province ◽  
Lava Pile

The Lesotho remnant contains the type succession for Karoo low-Ti basalts of central southern Africa. The <sup>40</sup>Ar/<sup>39</sup>Ar dating indicates that the sequence was emplaced within a very short period at about 180 Ma and consists of a monotonous pile of compound basalt lava flows which lacks significant palaeosols and persistent sedimentary intercalations. We have used geochemistry to establish a stratigraphic subdivision of the lava pile. Thin units of basalt flows, the Moshesh's Ford, Golden Gate, Sani, Roma, Letele, and Wonderkop units, with diverse geochemical character and restricted geographical distribution, are present at the base of the succession. These are overlain by extensive units of compositionally more uniform basalt, the Mafika Lisiu, Maloti, Senqu and Mothae units, which build the bulk of the sequence.<div><p>Location of this section is described in Marsh et al. (1997) AGU Geophysical Monograph, 100, 247-272.</p><p> </p><p>Title of data set: Ongeluksnek Pass</p><div><br></div></div>

Constraining the duration of the Tarim flood basalts (northwestern China): CA-TIMS zircon U-Pb dating of tuffs

2021 ◽  
Author(s):  
Yu-Ting Zhong ◽  
Zhen-Yu Luo ◽  
Roland Mundil ◽  
Xun Wei ◽  
Hai-Quan Liu ◽  
...  
Keyword(s):  
Thermal Ionization Mass Spectrometry ◽  
Northwest China ◽  
Lava Flows ◽  
Northwestern China ◽  
Large Igneous Province ◽  
Ionization Mass ◽  
Flood Basalts ◽  
Eruption Rate ◽  
Long Duration ◽  
Igneous Province

The Early Permian Tarim large igneous province (LIP) in northwestern China comprises voluminous basaltic lava flows, as well as ultramafic and silicic intrusions. The age and duration of the Tarim LIP remains unclear, and thus the rate of magma production and models of potential environmental effects are uncertain. Here we present high-precision chemical abrasion−isotope dilution−thermal ionization mass spectrometry zircon U-Pb ages for three newly discovered tuff layers interlayered with lava flows in the Kupukuziman and Kaipaizileike formations in the Keping area (Xinjiang, northwest China). The volcanism of the Kupukuziman Formation is constrained to a short duration from 289.77 ± 0.95 to 289.41 ± 0.52 Ma. An age for the overlying Kaipaizileike Formation is 284.27 ± 0.39 Ma, bracketing the duration of the entire eruptive phase of the Tarim flood basalts at ∼5.5 m.y. The low eruption rate and relatively long duration of magmatism is consistent with a plume incubation model for the Tarim LIP.

The mineral chemistry and petrology of Tertiary pitchstones from Scotland

1998 ◽  
Vol 89 (2) ◽  
pp. 95-111 ◽  
Author(s):  
R. J. Preston ◽  
M. J. Hole ◽  
J. Still ◽  
H. Patton
Keyword(s):  
Trace Element ◽  
Major Element ◽  
Crustal Contamination ◽  
Mineral Chemistry ◽  
Lava Flows ◽  
Residual Glass ◽  
Pb Isotope ◽  
Isotope Data ◽  
Igneous Province ◽  
Basaltic Magmas

AbstractSub-silicic to silicic pitchstones are widespread throughout the British Tertiary Igneous Province (BTIP), with examples being found at all the major igneous centres. Both highly porphyritic and almost completely aphyric varieties occur, and take the form of sills, dykes and lava flows. Here we present previously unreported mineral chemistry data on phenocryst and microcrystallite populations from a number of pitchstones from throughout the BTIP. Phenocryst assemblages are completely anhydrous, comprising mixtures of plagioclase, sanidine, fayalite, orthopyroxene, pigeonite, ferroaugite, ferrohedenbergite and quartz. Microcrystallite assemblages are also diverse, consisting of sanidine, ferrohedenbergite, fayalite and, occasionally, almost pure end-member ferrosilite, as well as hydrous phases such as ferrohornblende and biotite. Textural and mineral chemistry observations support interpretations derived from whole-rock and residual glass major element analyses, together with whole-rock trace element and the available Sr-Nd-Pb isotope data, that the Tertiary pitchstones of Scotland are either the products of intimate mixing between a range of basaltic magmas with hydrous crustal melts, or were formed by the crustal contamination of basaltic magmas.

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