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Artykuły w czasopismach na temat „Mid-lithospheric discontinuity”

Autor: Grafiati
Data publikacji: 6 września 2023

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Sprawdź 20 najlepszych artykułów w czasopismach naukowych na temat „Mid-lithospheric discontinuity”.

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1

Tharimena, Saikiran, Catherine A. Rychert, and Nicholas Harmon. "Seismic imaging of a mid-lithospheric discontinuity beneath Ontong Java Plateau." Earth and Planetary Science Letters 450 (September 2016): 62–70. http://dx.doi.org/10.1016/j.epsl.2016.06.026.

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2

Goev, A. G. "Deep velocity structure of the eastern margin of the Sarmatian protocraton based on the «Aleksandrovka» seismic station data from the receiver function technique." Moscow University Bulletin. Series 4. Geology, no. 6 (February 6, 2023): 88–94. http://dx.doi.org/10.33623/0579-9406-2022-6-88-94.

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A velocity section was obtained to a depth of about 250 km on the eastern margin of the Sarmatia protocraton (East-European Craton) based on P receiver functions (PRF). Seismograms of the new broadband station «Aleksandrovka» were used as initial data. The section reveals the main seismic boundaries, and also shows the presence of mid-lithospheric discontinuity in the upper mantle (MLD).
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3

Kind, R., X. Yuan, J. Mechie, and F. Sodoudi. "Structure of the upper mantle in the north-western and central United States from USArray S-receiver functions." Solid Earth Discussions 7, no. 1 (2015): 1025–57. http://dx.doi.org/10.5194/sed-7-1025-2015.

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Abstract. We used more than 40 000 S-receiver functions recorded by the USArray project to study the structure of the upper mantle between the Moho and the 410 km discontinuity from the Phanerozoic western United States to the cratonic central US. We obtained clear observations of downward velocity reductions in the uppermost mantle which are commonly interpreted as the lithosphere-asthenosphere boundary (LAB) in the western US and as the mid-lithospheric discontinuity (MLD) in the cratonic US. We observe the western LAB reaching partly to the mid-continental rift system underneath the cratoni
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4

Kind, R., X. Yuan, J. Mechie, and F. Sodoudi. "Structure of the upper mantle in the north-western and central United States from USArray S-receiver functions." Solid Earth 6, no. 3 (2015): 957–70. http://dx.doi.org/10.5194/se-6-957-2015.

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Abstract. We used more than 40 000 S-receiver functions recorded by the USArray project to study the structure of the upper mantle between the Moho and the 410 km discontinuity from the Phanerozoic western United States to the cratonic central US. In the western United States we observed the lithosphere–asthenosphere boundary (LAB), and in the cratonic United States we observed both the mid-lithospheric discontinuity (MLD) and the LAB of the craton. In the northern and southern United States the western LAB almost reaches the mid-continental rift system. In between these two regions the craton
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5

Zhang, Yaoyang, Ling Chen, Yinshuang Ai, and Mingming Jiang. "Lithospheric structure beneath the central and western North China Craton and adjacent regions from S-receiver function imaging." Geophysical Journal International 219, no. 1 (2019): 619–32. http://dx.doi.org/10.1093/gji/ggz322.

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Summary To elucidate the nature and extent of the lithospheric modification in the central and western North China Craton (NCC) and adjacent regions, we used the wave equation–based migration technique of S-receiver function on teleseismic data collected from 314 broadband stations in this region to image the lithospheric structure. Incorporating data from previous lithospheric structure studies, we obtained unprecedented high-resolution depth maps of the lithosphere–asthenosphere boundary (LAB) and mid-lithospheric discontinuity (MLD) in the NCC. Our results show more detailed variations of t
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6

Smart, Katie A., Sebastian Tappe, Alan B. Woodland, Chris Harris, Loretta Corcoran, and Antonio Simonetti. "Metasomatized eclogite xenoliths from the central Kaapvaal craton as probes of a seismic mid-lithospheric discontinuity." Chemical Geology 578 (September 2021): 120286. http://dx.doi.org/10.1016/j.chemgeo.2021.120286.

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7

Shi, Ya-Nan, Fenglin Niu, Zhong-Hai Li, and Pengpeng Huangfu. "Craton destruction links to the interaction between subduction and mid-lithospheric discontinuity: Implications for the eastern North China Craton." Gondwana Research 83 (July 2020): 49–62. http://dx.doi.org/10.1016/j.gr.2020.01.016.

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8

Liu, Lin, Simon L. Klemperer, and Alexander R. Blanchette. "Western Gondwana imaged by S receiver-functions (SRF): New results on Moho, MLD (mid-lithospheric discontinuity) and LAB (lithosphere-asthenosphere boundary)." Gondwana Research 96 (August 2021): 206–18. http://dx.doi.org/10.1016/j.gr.2021.04.009.

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9

Saha, Sriparna, Rajdeep Dasgupta, and Kyusei Tsuno. "High Pressure Phase Relations of a Depleted Peridotite Fluxed by CO2 -H2 O-Bearing Siliceous Melts and the Origin of Mid-Lithospheric Discontinuity." Geochemistry, Geophysics, Geosystems 19, no. 3 (2018): 595–620. http://dx.doi.org/10.1002/2017gc007233.

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10

Peng, Ye, and Mainak Mookherjee. "Thermoelasticity of tremolite amphibole: Geophysical implications." American Mineralogist 105, no. 6 (2020): 904–16. http://dx.doi.org/10.2138/am-2020-7189.

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Abstract We investigated the structure, equation of state, thermodynamics, and elastic properties of tremolite amphibole [Ca2Mg5Si8O22(OH)2] up to 10 GPa and 2000 K, using first principles simulations based on density functional perturbation theory. We found that at 300 K, the pressure-volume results can be adequately described by a third-order Birch-Murnaghan equation of state with bulk moduli K0 of 78.5 and 66.3 GPa based on local density approximation (LDA) and generalized gradient approximation (GGA), respectively. We also derived its coefficients of the elastic tensor based on LDA and GGA
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11

Kumar, P., X. Yuan, R. Kind, and J. Mechie. "The lithosphere-asthenosphere boundary observed with USArray receiver functions." Solid Earth Discussions 4, no. 1 (2012): 1–31. http://dx.doi.org/10.5194/sed-4-1-2012.

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Abstract. The dense deployment of seismic stations so far in the western half of the United States within the USArray project provides the opportunity to study in greater detail the structure of the lithosphere-asthenosphere system. We use the S receiver function technique for this purpose which has higher resolution than surface wave tomography, is sensitive to seismic discontinuities and has no problems with multiples like P receiver functions. Only two major discontinuities are observed in the entire area down to about 300 km depth. These are the crust-mantle boundary (Moho) and a negative
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12

Kumar, P., X. Yuan, R. Kind, and J. Mechie. "The lithosphere-asthenosphere boundary observed with USArray receiver functions." Solid Earth 3, no. 1 (2012): 149–59. http://dx.doi.org/10.5194/se-3-149-2012.

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Abstract. The dense deployment of seismic stations so far in the western half of the United States within the USArray project provides the opportunity to study in greater detail the structure of the lithosphere-asthenosphere system. We use the S receiver function technique for this purpose, which has higher resolution than surface wave tomography, is sensitive to seismic discontinuities, and is free from multiples, unlike P receiver functions. Only two major discontinuities are observed in the entire area down to about 300 km depth. These are the crust-mantle boundary (Moho) and a negative bou
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13

Yang, Haibin, Irina M. Artemieva, and Hans Thybo. "The Mid‐Lithospheric Discontinuity caused by channel flow in proto‐cratonic mantle." Journal of Geophysical Research: Solid Earth, March 21, 2023. http://dx.doi.org/10.1029/2022jb026202.

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14

Shi, Ya‐Nan, Zhong‐Hai Li, Ling Chen, and Jason P. Morgan. "Connection between a subcontinental plume and the mid‐lithospheric discontinuity leads to fast and intense craton lithospheric thinning." Tectonics, September 6, 2021. http://dx.doi.org/10.1029/2021tc006711.

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15

Goldhagen, Gillian B., Heather A. Ford, and Maureen D. Long. "Evidence for a lithospheric step and pervasive lithospheric thinning beneath southern New England, northeastern USA." Geology, June 21, 2022. http://dx.doi.org/10.1130/g50133.1.

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In this study, we use data from the SEISConn seismic experiment to calculate Sp receiver functions in order to characterize the geometry of upper-mantle structure beneath southern New England (northeastern United States). We image robust negative-velocity-gradient discontinuities beneath southern New England that we interpret as corresponding to the lithosphere-asthenosphere boundary (LAB) and identify a well-defined step of 15 km in LAB depth at a longitude of 73°W, which we interpret to be the boundary between Laurentian and Appalachian lithosphere, although the offset may be larger if the p
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16

Saxena, Arushi, and Charles Adam Langston. "Detecting lithospheric discontinuities beneath the Mississippi Embayment using S wave receiver functions." Geophysical Journal International, September 9, 2021. http://dx.doi.org/10.1093/gji/ggab367.

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Abstract Identifying upper-mantle discontinuities in the Central and Eastern US is crucial for verifying models of lithospheric thinning and a low-velocity anomaly structure beneath the Mississippi Embayment. In this study, S-wave receiver functions (SRFs) were used to detect lithospheric boundaries in the embayment region. The viability of SRFs in detecting seismic boundaries was tested before computing them using the earthquake data. A careful analysis using a stochastic noise and coda model on the synthetics revealed that a negative velocity contrast could be detected with certainty at low
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17

Qi, Rui, Jie Liao, Xiaohui Liu, and Rui Gao. "Numerical Investigation on the Dynamic Evolution of Intra-Crustal Continental Delamination." Frontiers in Earth Science 10 (March 9, 2022). http://dx.doi.org/10.3389/feart.2022.829300.

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Delamination often occurs in continental regions, through which process the lithospheric mantle detaches from the continental crust and sinks into the underlying asthenospheric mantle. Various modes of continental delamination are proposed, including the typical mode of delamination along the Moho and the newly proposed delamination along the mid-lithospheric discontinuity. Geological and geophysical observations reveal the possibility of an alternative mode of delamination, i.e., intra-crustal continental delamination, which is rarely studied. Using the 2D thermo-mechanical coupled geodynamic
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18

"Models of mantle convection: one or several layers." Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences 328, no. 1599 (1989): 417–24. http://dx.doi.org/10.1098/rsta.1989.0045.

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Numerical model calculations are used to determine if convection in the Earth’s mantle could be organized in two or more layers with only limited mass exchange in between. The seismic discontinuity at 670 km depth and the top of the D"-layer at the bottom of the mantle are considered as candidates for internal boundaries. If the 670 km discontinuity is caused by an isochemical phase transition, it has to have a Clapeyron slope of dp/dT ⩽ — 6 MPa k -1 to prevent convection currents from crossing; this value is improbably low. If the discontinuity represents a chemical boundary, the intrinsic de
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19

Kind, Rainer, Walter D. Mooney, and Xiaohui Yuan. "New insights into the structural elements of the upper mantle beneath the contiguous United States from S-to-P converted seismic waves." Geophysical Journal International, April 25, 2020. http://dx.doi.org/10.1093/gji/ggaa203.

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Summary The S-receiver function (SRF) technique is an effective tool to study seismic discontinuities in the upper mantle such as the mid-lithospheric discontinuity (MLD) and the lithosphere-asthenosphere boundary (LAB). This technique uses deconvolution and aligns traces along the maximum of the deconvolved SV signal. Both of these steps lead to acausal signals, which may cause interference with real signals from below the Moho. Here we go back to the origin of the S-receiver function method and process S-to-P converted waves using S-onset times as the reference time and waveform summation wi
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20

Shaikh, Azhar M., Sebastian Tappe, Yannick Bussweiler, et al. "Clinopyroxene and Garnet Mantle Cargo in Kimberlites as Probes of Dharwar Craton Architecture and Geotherms, with Implications for Post-1·1 Ga Lithosphere Thinning Events Beneath Southern India." Journal of Petrology, August 26, 2020. http://dx.doi.org/10.1093/petrology/egaa087.

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Abstract The Wajrakarur Kimberlite Field (WKF) on the Eastern Dharwar Craton in southern India hosts several occurrences of Mesoproterozoic kimberlites, lamproites and ultramafic lamprophyres, for which mantle-derived xenoliths are rare and only poorly preserved. The general paucity of mantle cargo has hampered the investigation of the nature and evolution of the continental lithospheric mantle (CLM) beneath cratonic southern India. We present a comprehensive study of the major and trace element compositions of clinopyroxene and garnet xenocrysts recovered from heavy mineral concentrates for t
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