Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Ji, Feng"'
Autor:
Noreen J. Evans, Zhihan Li, Hong-Fu Zhang, Yue-Heng Yang, Ji-Feng Ying, Xin-Miao Zhao, Hui Wang
Publikováno v:
Lithos. :105987
This paper reports petrology, major and trace element abundances in bulk-rocks and minerals, and clinopyroxene Sr-Nd-Hf compositions from a suite of mantle xenoliths entrained in Cenozoic Sanyitang alkali basalts, Jining County in the Inner Mongolia
Autor:
Ji-Feng Xu, Paul T. Robinson, Guangying Feng, Xiaolu Niu, Zhao Liu, Jie Li, Jingsui Yang, Fahui Xiong, Wenda Zhou, Xiangzhen Xu
Publikováno v:
Ore Geology Reviews. 80:1020-1041
On the basis of their mineral chemistry, podiform chromitites are divided into high-Al (Cr# = 20–60) (Cr# = 100 ∗ Cr/(Cr + Al)) and high-Cr (Cr# = 60–80) varieties. Typically, only one type occurs in a given peridotite massif, although some oph
Publikováno v:
Geochemistry, Geophysics, Geosystems. 17:4859-4877
In addition to fluids, the concept of sediment-derived melts infiltrating the fore-arc mantle during subduction initiation has been proposed based on studies of modern subduction zones and ophiolite melange. However, outcrops that contain the product
Publikováno v:
Lithos. :105680
We present detailed major-, trace-element and Sr-Nd-Mg isotopic geochemistry for a suite of pyroxenite xenoliths entrained in Oligocene basalts in Yangyuan county, North China Craton, to reveal their origins and to further constrain the evolution of
Autor:
Fei Liu, Songyong Chen, Ji-Feng Xu, Xiaolu Niu, Zhao Liu, Guangying Feng, Yildirim Dilek, Jie Li, Jingsui Yang, Fahui Xiong
Publikováno v:
Journal of Asian Earth Sciences. 110:72-84
The Dongbo peridotite massif in the western part of the Yarlung Zangbo Suture Zone (YZSZ) in southern Tibet represents a mantle thrust sheet of more than 400 km 2 , tectonically overlying a Cretaceous melange. Spinel-harzburgite with a porphyroclasti
Publikováno v:
Chemical Geology. 405:10-18
Ultrapotassic igneous rocks can generally be divided into two sub-groups based on the tectonic settings in which they formed. The orogenic sub-group occurs in subduction-related tectonic settings, while the anorogenic sub-group is confined to stable
Autor:
Thomas Bader, Mark Scheltens, Xuehui Yu, Xiong-Fei Huang, Jie Li, Xiao-Wei Li, Zhenyu Chen, Xuanxue Mo, Ji-Feng Xu
Publikováno v:
Journal of Asian Earth Sciences. 98:436-445
The magnitude of crustal contamination in intra-continental OIB-like basalts is commonly difficult to assess in terms of major, trace-element and Pb–Sr–Nd isotopes. However, the Re–Os isotope system is a very sensitive tracer of the crustal com
Publikováno v:
Lithos. :53-66
The unique eruptions of ultrapotassic volcanic rocks in eastern China reported so far took place in the Xiaogulihe area of western Heilongjiang Province, NE China. These ultrapotassic rocks are characterized by extremely high K 2 O contents (> 7 wt.%
Publikováno v:
Contributions to Mineralogy and Petrology. 172
The mechanism and process of lithospheric thinning beneath the North China Craton (NCC) are still debated. A key criterion in distinguishing among the proposed mechanisms is whether associated continental basalts were derived from the thinning lithos
Publikováno v:
Earth-Science Reviews. 118:45-68
article i nfo Studies of mantle xenoliths have confirmed that Archean subcontinental lithospheric mantle (SCLM) is highly depleted in basaltic components (such as Al, Ca and Na) due to high-degree extraction of mafic and ultramafic melts and thus is