Site U1513

Huber, Brian T.; Hobbs, R. W.; Bogus, Kara; Batenburg, Sietske J.; Brumsack, Hans‐Jürgen; Guerra, Rodrigo do Monte; Edgar, Kirsty M.; Edvardsen, T.; Tejada, M. L. G.; Harry, Dennis L.; Hasegawa, Takashi; Haynes, S.J.; Jiang, Tao; Jones, Matthew M.; Kuroda, Junichiro; Lee, Eun Young; Li, Y.X.; MacLeod, Kenneth G.; Maritati, A.; Martínez, Mathieu; O’Connor, Lauren K.; Petrizzo, Maria Rose; Quan, Tracy M.; Richter, Carl; Riquier, Laurent; Tagliaro, Gabriel; Wainman, Carmine; Watkins, David; White, L.B.; Wolfgring, Erik; Xu, Zuyan

doi:10.14379/iodp.proc.369.104.2019

Cited by 19 publications

(43 citation statements)

References 45 publications

(64 reference statements)

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“…It is supported by the presence of corrensite (chlorite/vermiculite) and vermiculite in the weakly altered sections (Figure 4b), which occurs in the early stages of hydrothermal alteration (Aspandiar & Eggleton, 2002; Büchl & Gier, 2003). The gradients for Mg, K, and Na (potentially as well Li) in the pore waters derived from the overlying sedimentary sequence (Huber et al., 2019b) also indicate that the basaltic rocks and volcaniclastic layers are still showing signs of active alteration. The loss in Na from the pore waters is significant and supports the formation of Mg‐rich chlorite and other clay minerals and possibly albitization in the underlying volcanic sequence.…”

Section: Discussionmentioning

confidence: 99%

Petrophysical Property Modifications by Alteration in a Volcanic Sequence at IODP Site U1513, Naturaliste Plateau

et al. 2021

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Petrophysical properties of volcanic rocks are controlled by lithology and subsequent modification by alteration processes. Investigating the linkages, using a range of different techniques, are important to establish how petrophysical properties can inform about the alteration state of volcanic rocks. Here, we compile petrophysical data and correlate these with geochemical and mineralogical analyses acquired from a volcanic sequence on the Naturaliste Plateau, offshore southwest Australia (International Ocean Discovery Program Site U1513). The sequence consists of alternating basalt lava flows and volcaniclastic deposits, intruded by multiple dolerite dikes. Variable alteration intensities from fresh-slight to strong are quantified using Chemical Index of Alteration. Intervals of slightly altered dikes exhibit low porosity and high values of bulk density, P-wave velocity, and thermal conductivity. The increase of alteration intensity corresponds to decreases in bulk density to ∼2 g/cm 3 , P-wave velocity to ∼2,000 m/s, thermal conductivity to ∼1.2 W/(m•K) and an increase in porosity up to 50%. Natural Gamma Ray and magnetic susceptibility vary downhole with rock composition and at lithologic boundaries. The distinct variations exhibit a good correlation with primary lithologic characteristics and secondary mineralogical and textural changes attributed to alteration processes. We provide synthesis models of petrophysical variation with alteration intensity. Although differences in primary lithology and alteration type introduce limitations and uncertainties, there is a reasonable applicability of our results to rapidly characterize the alteration intensity and volcanic stratigraphy in volcanic sequences and to calibrate wireline log-based determinations. This will help others to develop strategies for exploration, drilling, and geophysical research of volcanic rocks. Plain Language SummaryWe present the physical properties of rocks comprising a volcanic sequence recovered from the eastern Naturaliste Plateau, offshore southwest Australia. The sequence consists of basalt lava flows and volcaniclastic deposits, which are intruded by multiple dikes. Petrophysical properties of the volcanic rocks are variable with lithology and alteration state. To investigate the linkages, we applied a range of different techniques to correlate petrophysical data with geochemical and mineralogical analyses. The alteration intensity was quantified based on chemical composition into four ranges; fresh-slight, weak, moderate, and strong. Relatively fresh basalt intervals exhibit low porosity and high values of bulk density, P-wave velocity, and thermal conductivity. Increases of alteration intensity correspond to decreases in bulk density to ∼2 g/cm 3 , P-wave velocity to ∼2,000 m/s, thermal conductivity to ∼1.2 W/(m•K), and an increase in porosity up to 50%. Natural Gamma Ray and magnetic susceptibility vary with rock composition and at lithologic boundaries. The petrophysical variations were associated with primary lithologic charact...

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Section: Discussionmentioning

confidence: 99%

Petrophysical Property Modifications by Alteration in a Volcanic Sequence at IODP Site U1513, Naturaliste Plateau

et al. 2021

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“…The seismic unconformity can be traced into the eastern Mentelle Basin where it is equivalent or nearly equivalent to the Valanginian breakup unconformity encountered at Site U1515. Pillow structures present in some flows and oxidation of most flows suggest eruption in a nearshore shallow water to subaerial environment (Huber et al, 2019a;Tejada et al, 2020). We interpret the basalt flows to have been erupted near sea level during the last stages of extension on this part of the southwestern Australian margin, immediately after seafloor spreading had begun on the Perth Abyssal Plain between magnetochrons M11r and M11n (133-132 Ma) but before the onset of seafloor spreading west of the Naturaliste Plateau between magnetochrons M5n and M3n (126-124 Ma).…”

Section: Stratigraphic Record Of the Rift To Drift Transition On The mentioning

confidence: 99%

“…Downhole geological, geophysical, and geochemical datasets used in this research are accessible through the following International Ocean Discover Program publications and their supplemental information files: Hobbs et al (2019) and Huber et al (2019a), available online at http://publications.iodp.org/proceedings/369/369title.html. Seismic reflection profiles shown in this paper are available from Geoscience Australia National Offshore Petroleum Information…”

Section: Data Availability Statementmentioning

confidence: 99%

“…Seismic profile is available from Geoscience Australia National Offshore Petroleum Information Management System (https://nopims.dmp.wa.gov.au/nopims). Seismic interpretation is modified after Hall et al (2013), updated with IODP Expedition 369 drilling results using the time-depth conversions published in the Expedition 369 Proceedings for Sites U1513 (Huber et al, 2019a) and U1515 (Huber et al, 2019b). .…”

Section: Accepted Articlementioning

confidence: 99%

“…Position in Ammonite Zone (Ogg et al, 2016) Age Based on X-Ray Fluorescence analysis using AXIOS Plus (Panalytical) instrument at University of Oldenburg on shipboard residual sample powder previously analyzed by ICP-AES (Huber et al, 2019a).…”

Section: Chronmentioning

confidence: 99%

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Evolution of the Southwest Australian Rifted Continental Margin During Breakup of East Gondwana: Results From International Ocean Discovery Program Expedition 369

Harry

Tejada

Lee

et al. 2020

Geochem Geophys Geosyst

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International Ocean Discovery Program Expedition 369 drilled four sites on the southwestern Australian continental margin, in the deep water Mentelle Basin (MB) and on the neighboring Naturaliste Plateau (NP). The drillsites are located on continental crust that continued rifting after seafloor spreading began further north on the Perth Abyssal Plain (PAP) between magnetochrons M11r and M11n (133-132 Ma), ending when spreading began west of the NP between chrons M5n and M3n (126-124 Ma). Drilling recovered the first in-situ samples of basalt flows overlying the breakup unconformity on the NP, establishing a magnetostratigraphically constrained eruption age of >131-133 Ma and confirming a minimal late Valanginian age for the breakup unconformity (coeval with the onset of PAP seafloor spreading). Petrogenetic modeling indicates the basalts were generated by 25% melting at 1.5 GPa and a potential temperature of 1380-1410 °C, consistent with proximity of the Kerguelen plume during breakup. Benthic foraminiferal fossils indicate that the NP remained at upper bathyal or shallower depths during the last 6 Myr of rifting and for 3-5 Myr after breakup between India and Australia. The limited subsidence is attributed to heat from the nearby Kerguelen plume and PAP spreading ridge. The margin subsided to middle bathyal depths by Albian time and to lower bathyal (NP) or greater (MB) depths by late Paleogene time. Periods of rapid sedimentation accompanied a westward jump of the PAP spreading ridge (108 Ma), rifting on the southern margin (100-84 Ma), and opening of the southern seaway between Australia and Antarctica (60-47 Ma).

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Variations in weathering conditions related to sea level changes during the Albian-Santonian interval in the Western Australian margin as evidenced by clay minerals and Nd/Sr isotopes

Munier,

Riquier,

Révillon

et al. 2024

Chemical Geology

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Site U1513

Abstract: Background and objectives 2 Operations 8 Lithostratigraphy 18 Biostratigraphy and micropaleontology 26 Paleomagnetism 39 Petrophysics 50 Geochemistry 56 Stratigraphic correlation 58 References

Cited by 19 publications

References 45 publications

Petrophysical Property Modifications by Alteration in a Volcanic Sequence at IODP Site U1513, Naturaliste Plateau

Petrophysical Property Modifications by Alteration in a Volcanic Sequence at IODP Site U1513, Naturaliste Plateau

Evolution of the Southwest Australian Rifted Continental Margin During Breakup of East Gondwana: Results From International Ocean Discovery Program Expedition 369

Variations in weathering conditions related to sea level changes during the Albian-Santonian interval in the Western Australian margin as evidenced by clay minerals and Nd/Sr isotopes

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