Results 241 to 250 of about 8,217 (293)

Possibilities and limitations of isotopic chemostratigraphy

Lithology and Mineral Resources, 2009
Postsedimentary transformations of rocks impede the use of isotopic methods for the paleoecological reconstruction and correlation of geological events. This fact was demonstrated previously based on the study of Neoproterozoic-Cambrian rocks (Vinogradov, 2008). Detailed analysis of literature material shows that the younger (Paleozoic) rocks were also
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Spatial Distribution of Critical Metals and Chemostratigraphy in Co‐Rich Ferromanganese Nodules in the Northwestern Pacific Ocean

Journal of Geophysical Research: Oceans
Ferromanganese nodules are important marine storehouses for critical metals and windows for changing oceans. Although advanced in situ analytical techniques have been applied to visualize the elemental distribution in the nodule cross‐sections, their ...
Jiangbo Ren, Yong Yang, Miao Yu, Jiancheng Liu, Shuaijie Luo, Jie Li, X. Deng, Xiuzhan Zhang, Fang Dong, Limin Zhang, Zhenquan Wei, Gaowen He   +11 more
semanticscholar   +1 more source

A quantitative procedure for chemostratigraphy

Stratigraphy, 2004
A method for condensing a sequence of geochemical determinations into a set of vector-lengths for plotting is proposed. Data from the eastern Chinese non-marine Upper Cretaceous are used for exemplifying the procedure. The effect of reducing the dimensionality by deleting minor elements is illustrated.
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ChemCam: Chemostratigraphy by the First Mars Microprobe

Elements, 2015
The ChemCam laser-induced breakdown spectrometer on the rover Curiosity has provided more than 200,000 spectra from over 5000 different locations on Mars. This instrument is the first chemical microprobe on Mars and has an analytical footprint 0.3–0.6 mm in diameter.
Wiens, R. C., Maurice, S. and the MSL Science Team, DLR Collaborator (MSL Science Team), Reitz G.   +2 more
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Chemostratigraphy across the Permian-Triassic Boundary

2018
A major extinction pulse occurred just below the conodont‐defined Permian‐Triassic boundary. Global‐scale compilations of increasingly larger paleontological, sedimentological, and geochemical datasets further amplify our understanding of this event by unraveling temporospatial patterns.
Schobben, Martin, Heuer, Franziska, Tietje, Melanie, Ghaderi, Abbas, Korn, Dieter, Korte, Christoph, Wignall, Paul B.   +6 more
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Applications of Wellsite Chemostratigraphy

2018
Chemostratigraphy was first used at wellsite in the early 2000s but it is rather unfortunate that very little material has been published on the subject, with most articles taking the form of very short papers or conference abstracts. In spite of this, wellsite chemostratigraphy is becoming increasingly popular, as it can be used to provide lithology ...
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Chemostratigraphy of the Neoproterozoic Alona Bay lavas, Ontario

Canadian Journal of Earth Sciences, 2002
A basal sequence of flood basalt lavas associated with the Neoproterozoic Midcontinent rift system crops out in Alona Bay along the southeastern shore of Lake Superior in Ontario. The Alona Bay lava succession is about 1200 m thick and lies just north of the well-studied, contemporaneous Mamainse Point Formation.
James A Walker, Todd T Gmitro, Jonathan H Berg   +2 more
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Pelagic carbonate chemostratigraphy (Sr, Mg, 18O, 13C)

Marine Micropaleontology, 1986
Abstract A synthesis of the elementary (Sr and Mg) and isotopic (δ 18 O and δ 13 C) geochemistry of Mesozoic to Recent bulk pelagic carbonates suggests that the influence of late burial diagenesis is considerably less than was previously thought and that bulk carbonate geochemistry could be important for both paleoceanography and stratigraphy ...
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Real-time chemostratigraphy at wellsite; removing drilling uncertainties

Australian Energy Producers Journal
Real-time chemostratigraphy is a workflow deployed at wellsites to remove stratigraphic uncertainty and support drilling operations. This study presents the chemostratigraphic wellsite workflow which, during drilling operations, support either the placement of casing points (using predefined geochemical markers to target a depth above a specific ...
David Riley, Morven Davidson, Tim J. Pearce, Alex Fuerst, Jordan Kinsley   +4 more
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Fragment of an Early Cambrian Continental Margin in the Structure of the Tuva Segment of the Central Asian Orogenic Belt (Teregtig Formation): Results of U–Pb Zircon Dating and Sr Chemostratigraphy

Doklady earth sciences, 2023
A. Ivanov, E. Letnikova, S. Shkolnik, A. Maslov, N. Vetrova   +4 more
semanticscholar   +1 more source