Chemical Constitution of the Earth's Crust and Geochemical Balance of the Major Elements

Ronov, A. B.; Yaroshevskiy, A. A.; Migdisov, A. A.

doi:10.1080/00206819109465736

Cited by 122 publications

(24 citation statements)

References 83 publications

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“…6 allow us to conclude that the sedimentary material in the samples (except for samples from the sandy interval) was most likely derived from the shales of Paleozoic fold belts [25]. The only appropriate source rocks in the islands and continental blocks around the Bering Sea are those of Alaska [26].…”

Section: Resultsmentioning

confidence: 99%

Late pleistocene sedimentation history of the Shirshov Ridge, Bering Sea

et al. 2013

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Abstract-The analysis of the lithology, grain size distribution, clay minerals, and geochemistry of Upper Pleistocene sediments from the submarine Shirshov Ridge (Bering Sea) showed that the main source area was the Yukon-Tanana terrane of Central Alaska. The sedimentary materials were transported by the Yukon River through Beringia up to the shelf break, where they were entrained by a strong northwestward flowing sea current. The lithological data revealed several pulses of ice rafted debris deposition, roughly synchronous with Heinrich events, and periods of weaker bottom current intensity. Based on the geochemical results, we distinguished intervals of an increase in paleoproductivity and extension of the oxygen minimum zone. The results suggest that there were three stages of deposition driven by glacioeustatic sea level fluctuations and glacial cycles in Alaska.

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Section: Resultsmentioning

confidence: 99%

Late pleistocene sedimentation history of the Shirshov Ridge, Bering Sea

et al. 2013

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“…It should be noted that the metamorphic rock classification is compositionally broad (i.e., can refer to a rock of virtually any composition) and basically describes any rock with a crystalline texture interpreted to have been subject to elevated pressure and/or temperature sometime after initial formation of the rock (Hartmann & Moosdorf, 2012). Metamorphic rocks are~90% metasedimentary, with metaigneous rocks comprising the remaining~10% (Ronov et al, 1990), which bolsters the case that the Earth's weatherable shell is dominated by sedimentary (and metasedimentary) rocks (e.g., Bluth & Kump, 1991;Bluth & Kump, 1994).…”

Section: Carbon Sinks 321 Terrestrial Weatheringmentioning

confidence: 99%

Evolution of the Global Carbon Cycle and Climate Regulation on Earth

Isson

Planavsky

Coogan

et al. 2020

Global Biogeochemical Cycles

114

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The existence of stabilizing feedbacks within Earth's climate system is generally thought to be necessary for the persistence of liquid water and life. Over the course of Earth's history, Earth's atmospheric composition appears to have adjusted to the gradual increase in solar luminosity, resulting in persistently habitable surface temperatures. With limited exceptions, the Earth system has been observed to recover rapidly from pulsed climatic perturbations. Carbon dioxide (CO2) regulation via negative feedbacks within the coupled global carbon‐silica cycles are classically viewed as the main processes giving rise to climate stability on Earth. Here we review the long‐term global carbon cycle budget, and how the processes modulating Earth's climate system have evolved over time. Specifically, we focus on the relative roles that shifts in carbon sources and sinks have played in driving long‐term changes in atmospheric pCO2. We make the case that marine processes are an important component of the canonical silicate weathering feedback, and have played a much more important role in pCO2 regulation than traditionally imagined. Notably, geochemical evidence indicate that the weathering of marine sediments and off‐axis basalt alteration act as major carbon sinks. However, this sink was potentially dampened during Earth's early history when oceans had higher levels of dissolved silicon (Si), iron (Fe), and magnesium (Mg), and instead likely fostered more extensive carbon recycling within the ocean‐atmosphere system via reverse weathering—that in turn acted to elevate ocean‐atmosphere CO2 levels.

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“…Volcanogenic matter, fragments of rhyolite pumice and globules of Fe-and Mn-oxyhydroxides are abundant in the abiogenic matter associated with the terrigenous clayey material (Bogdanov 1990b). and Lisitzin et al (1990); T -average for oceanic tholeiites, from Taylor (1968); S -average for continental sedimentary rocks, from Ronov et al (1990); G -average for granites and granodiorites, from Vinogradov (1962). 1.52).…”

Section: Sediments In the Areas Of Hydrothermal Activity In The Southmentioning

confidence: 99%

Metalliferous Sediments of the World Ocean

2006

130

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Chemical Constitution of the Earth's Crust and Geochemical Balance of the Major Elements

Cited by 122 publications

References 83 publications

Late pleistocene sedimentation history of the Shirshov Ridge, Bering Sea

Late pleistocene sedimentation history of the Shirshov Ridge, Bering Sea

Evolution of the Global Carbon Cycle and Climate Regulation on Earth

Metalliferous Sediments of the World Ocean

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