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Peng-Fei Zhang
University of Hong Kong
11Publications
4H-index
49Citations
Publications 11
Newest
#1Xia Liu (CAS: Chinese Academy of Sciences)H-Index: 2
#2Ben-Xun Su (CAS: Chinese Academy of Sciences)H-Index: 26
Last.Patrick Asamoah Sakyi (University of Ghana)H-Index: 19
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Abstract Chromitites in the Pozanti-Karsanti ophiolite in Turkey mainly occur as podiform chromitites within mantle harzburgite and stratiform-like chromitites in mantle-crust transition zone. Chromites in chromitites have varing Cr# from 62.8 to 80.3 and can be divided into two types, namely; intermediate (Cr#: 62.8 – 69.2) and high-Cr (Cr#: 73.9 – 80.3) types. Major elements of the high-Cr chromitite have an affinity with boninite, whereas the intermediate chromitite shows transitional feature...
1 CitationsSource
#1Peng-Fei Zhang (HKU: University of Hong Kong)H-Index: 4
#2Mei-Fu Zhou (HKU: University of Hong Kong)H-Index: 71
Last.Yongsheng He (China University of Geosciences)H-Index: 19
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Abstract Combined Fe isotopic and olivine fabric analyses have been conducted on the nodular chromitites from the Luobusa ophiolite, Tibet, to study the physico-chemical effects of plastic flow in modifying chromitites and their associated mantle peridotites below spreading centers. The Luobusa nodular chromitites are generally composed of fresh dunitic matrices and well-aligned chromite nodules. Olivine grains in both the dunitic matrices and chromite nodules underwent pressure solution, and th...
Source
#1Peng-Fei Zhang (HKU: University of Hong Kong)H-Index: 4
#2Mei-Fu Zhou (HKU: University of Hong Kong)H-Index: 71
Last.Paul T. Robinson (HKU: University of Hong Kong)H-Index: 14
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Source
#1Peng-Fei Zhang (HKU: University of Hong Kong)H-Index: 4
#2Mei-Fu Zhou (HKU: University of Hong Kong)H-Index: 71
Last.Xiaoping Xia (CAS: Chinese Academy of Sciences)H-Index: 34
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Abstract The Li-O isotopes of olivine and pyroxene from the mantle sequence of the Luobusa ophiolite, a fragment of Neo-Tethyan forearc lithosphere in Tibet, reveal a series of magmatic processes and geochemical evolution in a nascent mantle wedge during subduction initiation. Olivine grains from the ophiolitic mantle sequence display δ 18 O values similar to those of normal mantle (+5.18 ± 0.2‰), but have large δ 7 Li variations, ∼+4‰ to +13‰ in harzburgites and ∼+1‰ to +11‰ in high-Cr chromiti...
3 CitationsSource
#1Jie Jun Jing (CAS: Chinese Academy of Sciences)H-Index: 1
#2Ben-Xun Su (CAS: Chinese Academy of Sciences)H-Index: 26
Last.Peng-Fei Zhang (HKU: University of Hong Kong)H-Index: 4
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To identify metasomatic overprints in the mantle xenoliths from the Tethys orogenic belt in NW Turkey, we report here in situ Li concentrations and isotopic compositions of olivine, clinopyroxene and orthopyroxene along with major element compositions of minerals, and whole-rock trace element compositions of the mantle xenoliths composed of refractory harzburgites with subordinate lherzolites and one olivine-websterite. Their non-depleted whole-rock light rare earth element (LREE) patterns, enri...
2 CitationsSource
#1Ben-Xun Su (CAS: Chinese Academy of Sciences)H-Index: 26
#2Chen Chen (CAS: Chinese Academy of Sciences)H-Index: 6
Last.Peng-Fei Zhang (HKU: University of Hong Kong)H-Index: 4
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6 CitationsSource
#1Peng-Fei ZhangH-Index: 4
#2Mei-Fu ZhouH-Index: 71
Last.Yongsheng HeH-Index: 19
view all 7 authors...
1 CitationsSource
#1Peng-Fei Zhang (HKU: University of Hong Kong)H-Index: 4
#2Mei-Fu Zhou (HKU: University of Hong Kong)H-Index: 71
Last.Yongsheng He (China University of Geosciences)H-Index: 19
view all 7 authors...
The paleo-Moho transition zone (MTZ) of the Kop ophiolite in NE Turkey is mainly composed of dunites, which are locally interlayered with chromitites and contain minor relics of harzburgites. Large Fe isotopic variations were observed for magnesiochromite (− 0.14 to 0.06‰) and olivine (− 0.12 to 0.14‰) from the MTZ rocks. In individual samples, magnesiochromite has lighter Fe isotopic compositions than olivine, which was probably caused by subsolidus Mg–Fe exchange between them. Both magnesiochr...
5 CitationsSource
#1Peng-Fei ZhangH-Index: 4
#2Ibrahim UysalH-Index: 20
Last.Erdi AvcıH-Index: 5
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1 CitationsSource
#1Peng-Fei Zhang (HKU: University of Hong Kong)H-Index: 4
#2Ibrahim Uysal (Karadeniz Technical University)H-Index: 20
Last.Erdi Avcı (Karadeniz Technical University)H-Index: 5
view all 5 authors...
Abstract The Kop ophiolite in NE Turkey is a forearc fragment of Neo-Tethys ocean, consisting mainly of a paleo-Moho transition zone (MTZ) and a harzburgitic upper mantle unit. Locally, the Kop MTZ contains cumulate dunites and high-Cr chromitites (Cr# up to ca. 79), which are cut by pyroxenites. Dunites and chromitites in the MTZ have REE concentrations that are 1–2 orders of magnitude lower than those of chondrite; they are either depleted in LREE or have concave REE shapes. The LREE depleted ...
14 CitationsSource
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