Journal of Earth Science
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Petrogenesis and Tectonic Implications of the Paiku Leucogranites, Northern Himalaya
Journal of Earth Science - Tập 30 Số 3 - Trang 525-534 - 2019
Geological Structure and Dynamics of the Yinggehai Active Rift Basin, South China Sea
Journal of Earth Science - Tập 34 - Trang 1732-1743 - 2023
The Yinggehai Basin is a unique NNW-trending petroliferous basin in the northwestern South China Sea. This paper mainly utilized stratigraphic, tectonic and seismic data by characterizing the geological structures and conducting the geo-mechanical analysis to study the formation, evolution and dynamics of the Yinggehai Basin. The study indicates that the Ailaoshan-Truong Son extruded terrane is co......
Late Oligocene-Early Miocene thrusting in southern East Kunlun Mountains, northern Tibetan plateau
Journal of Earth Science - Tập 20 - Trang 381-390 - 2009
Southward thrusting occurred in Late Oligocene-Early Miocene in southern East Kunlun (昆仑) Mountains formed the South Kunlun thrust (SKT). Permian strata and Triassic rocks were thrusted over the Paleocene-Eocene red-beds of Fenghuoshan (风火山) Group and Oligocene brownish red conglomerate and sandstone of Yaxicuo (雅西错) Group along SKT faults, formed tectonic slices, low-angle thrust faults, multi-sc......
Element response to the ancient lake information and its evolution history of argillaceous source rocks in the Lucaogou Formation in Sangonghe area of southern margin of Junggar Basin
Journal of Earth Science - Tập 24 - Trang 987-996 - 2013
With the analysis of the element geochemistry characteristics, the ancient lake information evolution history of the argillaceous source rocks in Lucaogou (芦草沟) Formation in Sangonghe (三工河) area is reconstructed. According to the ancient lake information and total organic matter (TOC) characteristics of argillaceous source rocks, the study section is divided into 6 Subsections. Subsection I mainly......
Paleogene tectonic evolution controls on sequence stratigraphic patterns in the Fushan sag, northern South China Sea
Journal of Earth Science - Tập 27 - Trang 654-669 - 2016
Tectonism is of extreme importance to sequence stratigraphic patterns in continental sedimentary basins, affecting both the architectures and internal makeup of sequences. Sequence stratigraphic framework of the Paleogene system in the Fushan sag, northern South China Sea, was built using 3D and 2D seismic data, complemented by drilling cores and well logs data. One first-order, three second-order......
Research program of determination of geological age by thermal analysis method
Journal of Earth Science - Tập 24 - Trang 657-662 - 2013
On the basis of previous research achievements of measuring the solid state nuclear track in apatite by thermal analysis method, the author further proposes the research program to measure the energy deposited by the solid state nuclear track contained in zircon, sphene, epidote, apatite and other samples, in order to study the geological age and geothermal history. Compared with the measurement o......
Characteristics of DDF at Baishui Glacier No. 1 region in Yulong Snow Mountain
Journal of Earth Science - Tập 21 - Trang 148-156 - 2010
Based on observed mass balance and meteorological data since September 2008 and ablation data by the expedition team of Tibetan plateau from June to August 1982 at Baishui (白水) Glacier No. 1 region, we analyzed the spatial and temporal changes of degree-day factor (DDF) of the Baishui Glacier No. 1 following the changes of space, time, and temperature, which lays a theoretical foundation to establ......
Anomalous signals prior to Wenchuan earthquake detected by superconducting gravimeter and broadband seismometers records
Journal of Earth Science - Tập 22 - Trang 640-651 - 2011
Using 1 Hz sampling records at one superconducting gravimeter (SG) station and 11 broadband seismometer stations, we found anomalous signals prior to the 2008 Wenchuan (汶川) earthquake event. The tides are removed from the original SG records to obtain the gravity residuals. Applying the Hilbert-Huang transform (HHT) and the wavelet analysis to the SG gravity residuals leads to time-frequency spect......
Insight into the Origin of Iron Ore Based on Elemental Contents of Magnetite and Whole-Rock Geochemistry: A Case of the Bipindi Banded Iron Formations, Nyong Complex, SW Cameroon
Journal of Earth Science - Tập 35 - Trang 16-28 - 2024
The Bipindi iron ore district is located in the central section of the Nyong Complex at the northwestern margin of the Congo Craton in Southwest Cameroon. This iron district contains numerous iron mineralization hosted by the Mewongo, Bibole, Kouambo, and Zambi banded iron formations (BIFs). These BIFs contain magnetite as the main iron ore mineral associated with pyrite, and gangue minerals are q......
Frequency-Domain Multi-Scale Early-Arrival Waveform Tomography with a Time-Domain Wavefield Modeling Engine
Journal of Earth Science - Tập 29 - Trang 679-688 - 2018
Early-arrival waveform tomography (EWT) is one of the most promising techniques for building near-surface velocity model. Based on finite-frequency wave equation, EWT estimates velocities by matching calculated early-arrival waveforms with the observed ones. However, the objective function of EWT can easily converge to local minimum because of the cycle-skipping phenomenon. In order to reduce the ......
Tổng số: 1,094
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