Results 11 to 20 of about 5,987 (214)

Milankovitch Period Uncertainties and Their Impact on Cyclostratigraphy [PDF]

open access: yesJournal of Sedimentary Research, 2015
Astronomically calibrated cyclostratigraphy relies on correct matching of observed sedimentary cycles to predicted astronomical drivers such as eccentricity, obliquity and climate-precession. However the periods of these astronomical cycles, in the past,
Waltham, David
core   +3 more sources

Proterozoic Milankovitch cycles and the history of the solar system [PDF]

open access: yesProceedings of the National Academy of Sciences, 2018
SignificancePeriodic variations in Earth’s orbit and rotation axis occur over tens of thousands of years, producing rhythmic climate changes known as Milankovitch cycles. The geologic record of these climate cycles is a powerful tool for reconstructing geologic time, for understanding ancient climate change, and for evaluating the history of our solar ...
Stephen R, Meyers, Alberto, Malinverno
openaire   +4 more sources

Identification of Milankovitch sedimentary cycle in Fengcheng Formation, Mahu depression: a case study of well Maye 1

open access: yesFrontiers in Earth Science
The sedimentary cycle of Fengcheng Formation in Junggar Basin changes rapidly and is difficult to identify. The low classification accuracy of high-frequency fine-grained sedimentary cycles restricts the exploration of unconventional shale oil and gas ...
Ran Wang   +3 more
doaj   +3 more sources

Quantitative impact of astronomical and sun-related cycles on the Pleistocene climate system from Antarctica records

open access: yesQuaternary Science Advances, 2021
We use the benefits of the full-resolution methodology for time-series decomposition singular spectrum analysis to assess the quantitative impact of orbital and, for the first time, millennial-scale Sun-related climate responses from EPICA records.
Paolo Viaggi
doaj   +1 more source

Milankovitch cycle of continental deep-water fine-grained sedimentary rocks in the lower submember of Es3 of Well FY1 in Dongying Sag and its significance for shale oil exploration

open access: yesEnergy Exploration & Exploitation, 2023
China has recently faced significant difficulties in the exploitation of its shale oil and gas resources. An essential geological obstacle preventing the breakthrough of Chinese shale oil exploration is the precise identification of productive oil and ...
Wei Wu   +4 more
doaj   +1 more source

Comparison of variations in sediment accumulation rates of the upper part of Zakeen Formation through cyclostratigraphic study in 2SK-1 and 2SKD-1 wells in Salman gas field [PDF]

open access: yesJournal of Stratigraphy and Sedimentology Researches, 2020
The Zakeen Formation is one of the possible gas reservoirs in the Zagros sedimentary basin. In this paper, the cyclostratigraphic study of the upper part of the Zakeen Formation was performed by using evolutionary spectral analysis methods.
Omid Falahatkhah   +2 more
doaj   +1 more source

Comparison of Recently Proposed Causes of Climate Change

open access: yesAtmosphere, 2023
This paper compares the ideas contained in the main papers published on climate change since World War II to arrive at a suggested consensus of our present knowledge regarding climatic changes and their causes.
Stuart A. Harris
doaj   +1 more source

GENERALIZED MILANKOVITCH CYCLES AND LONG-TERM CLIMATIC HABITABILITY [PDF]

open access: yesThe Astrophysical Journal, 2010
Although the Earth's orbit is never far from circular, terrestrial planets around other stars might experience substantial changes in eccentricity that could lead to climate changes, including possible "phase transitions" such as the snowball transition (or its opposite).
Spiegel, David S.   +4 more
openaire   +3 more sources

A Study on Astronomical Cycle Identification and Environmental Response Characteristics of Lacustrine Deep-Water Fine-Grained Sedimentary Rocks: A Case Study of the Lower Submember of Member 3 of Shahejie Formation in Well Fanye-1 of Dongying Sag, Bohai Bay Basin, China

open access: yesGeofluids, 2021
With the further exploration and development of shale oil and gas, cycle division of fine-grained sedimentary rock strata has been increasingly highly focused on by scholars. Owing to the application of the theory of classical sequence stratigraphy based
Ledan Yu   +4 more
doaj   +1 more source

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