Results 41 to 50 of about 12,976 (213)

A discovery of extremely REE-rich kimberlites: A possible new type of REE-deposit

open access: yesSolid Earth Sciences, 2021
Two newly discovered Mesozoic Group II kimberlites in the southeastern margin of North China Craton show extremely high ΣREE contents (ranging from 1046 to 1869 ppm), which also higher than the nearby Weishan carbonatite and other REE-bearing rocks in ...
Qi Hou   +5 more
doaj   +1 more source

Lateral variations in the crustal structure of the Indo-Eurasian collision zone [PDF]

open access: yes, 2018
We thank Michael Ritzwoller and two anonymous reviewers for constructive comments that have helped improve the manuscript. The majority of the seismic data used in this study were downloaded from IRIS DMC.
Gilligan, Amy, Priestley, Keith
core   +1 more source

Lithotectonic elements and geological events in the Hengshan-Wutai-Fuping belt: A synthesis and implications for the evolution of the Trans-North China Orogen [PDF]

open access: yes, 1995
The Hengshan-Wutai-Fuping belt is located in the middle segment of the Trans-North China Orogen, a Palaeoproterozoic continental collisional belt along which the Eastern and Western blocks amalgamated to form the North China Craton.
Sun, M   +8 more
core   +4 more sources

Global hydrogen reservoirs in basement and basins [PDF]

open access: yes, 2017
The authors are grateful to the Science and Technology Facilities Council (STFC) for funding, through Grant NE/G00322X/1. Samples were kindly contributed by K. Condie, M.J. Hole, and D. Muirhead.
Blamey, Nigel, Parnell, John
core   +1 more source

Seismic anisotropy of Precambrian lithosphere : Insights from Rayleigh wave tomography of the eastern Superior Craton [PDF]

open access: yes, 2017
The seismic data used in this study are freely available from the CNDC (Canadian National Data Centre for Earthquake Seismology and Nuclear Explosion Monitoring) and IRIS DMC (Data Management Center) via their data request tools.
Lee S.   +5 more
core   +2 more sources

Generation of the Early Cretaceous granitoid in the Dazeshan region, Jiaodong Peninsula: Implications for the crustal reworking in the North China Craton

open access: yesFrontiers in Earth Science, 2023
Lower crust-derived granitic rocks provide constraints on the crustal reworking process and consequently give hints on the destruction mechanism of the cratons. The North China Craton (NCC) underwent extensive crustal melting in the Mesozoic.
Leilei Dong   +4 more
doaj   +1 more source

Seismological structure of the 1.8 Ga Trans-Hudson Orogen of North America [PDF]

open access: yes, 2016
Precambrian tectonic processes are debated: what was the nature and scale of orogenic events on the younger, hotter, and more ductile Earth? Northern Hudson Bay records the Paleoproterozoic collision between the Western Churchill and Superior plates—the ∼
Abbott   +62 more
core   +1 more source

Mesozoic–Tertiary exhumation history of the Altai Mountains, northern Xinjiang, China: New constraints from apatite fission track data [PDF]

open access: yes, 2005
This study uses apatite fission track (FT) analysis to constrain the exhumation history of bedrock samples collected from the Altai Mountains in northern Xinjiang, China.
Allen   +37 more
core   +1 more source

Study on the basement structure in the southeastern North China by blasting seismic

open access: yesGeodesy and Geodynamics, 2018
Since the Mesozoic, southeastern North China Craton has experienced intense crustal thinning and lithosphere destruction. Some of the responses of the deep activity in the upper crust crystalline basement have been retained in a series of tectonic ...
Zhenyu Fan   +6 more
doaj   +1 more source

LA-ICP-MS U-Pb geochronology of detrital zircons from the Jining Complex, North China Craton and its tectonic significance [PDF]

open access: yes, 2006
LA-ICP-MS U-Pb zircon dating and cathodoluminescene (CL) image analysis were carried out to determine the protolith and metamorphic ages of high-grade Al-rich gneisses, named as "khondalites", from the Jining Complex of the North China Craton (NCC).
Luo, Y, Sun, M, Xia, X, Zhao, G
core   +1 more source

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