Lateral variation in oxygen fugacity and halogen contents in early Cretaceous magmas in Jiaodong area, East China: Implication for triggers of the destruction of the North China Craton
Lateral variation in oxygen fugacity and halogen contents in early Cretaceous magmas in Jiaodong area, East China: Implication for triggers of the destruction of the North China Craton
复制标题
胶东地区早白垩世岩浆氧逸度和卤素含量横向变化对华北克拉通破坏的触发因素的启示
DOI：
10.1016/j.lithos.2016.02.008
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发表时间：
2016-04
期刊：
影响因子：
3.5
通讯作者：
Xu YG
中科院分区：
文献类型：
--
作者：
Huang XL;He PL;Wang X;Zhong JW;Xu YG
Pacific subduction has been suggested as the trigger of the destruction of the North China Craton, but evidence for it remains ambiguous. To further investigate this issue, we studied Wulian pyroxene monzonite (123 ± 1 Ma) in the west and Rushan gabbro-diorite (115 ± 1 Ma) in the east of the Sulu orogen, East China. The rocks of both locations are characterized by low TiO2but high SiO2and K2O, fractionated REE patterns with notable negative Ta-Nb-Ti anomalies, and by high initial87Sr/86Sr ratios and strongly negative εNd(t) and εHf(t) values. These geochemical and isotopic characteristics can be interpreted to be formed by partial melting of enriched lithosphere mantle refertilized by recycled crustal materials that were associated with the Sulu orogeny. Oxygen fugacities of the Rushan gabbro-diorites, estimated based on magnetite-ilmenite equilibration, are significantly higher than those of Wulian pyroxene monzonite. This lateral difference is mirrored by lower F and F/Cl but higher Cl in biotite in the Rushan gabbro-diorite compared to Wulian pyroxene monzonite. All these data suggest a spatially heterogeneous Cretaceous mantle source in terms of halogens and water contents beneath the Sulu orogen, which was most likely caused by the subduction processes of the Pacific plate. H2O-rich fluid in the mantle beneath the east of the Sulu orogen closer to the mantle wedge was prominently from early dehydration of subducted slab at shallow depth, while F-bearing fluid to further west was released by dehydrated deeper slab or stagnant oceanic slab within the mantle transition zone.
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影响因子：
1.8
作者：
He‐Bo Peng
通讯作者：
He‐Bo Peng
影响因子：
3.9
作者：
Jin-Hui Yang;Fu-Yuan Wu;Sun‐Lin Chung;S. Wilde;M. Chu;C. Lo;B. Song
通讯作者：
Jin-Hui Yang;Fu-Yuan Wu;Sun‐Lin Chung;S. Wilde;M. Chu;C. Lo;B. Song
影响因子：
3.9
作者：
Jin-Hui Yang;Sun‐Lin Chung;S. Wilde;Fu-Yuan Wu;M. Chu;C. Lo;H. Fan
通讯作者：
Jin-Hui Yang;Sun‐Lin Chung;S. Wilde;Fu-Yuan Wu;M. Chu;C. Lo;H. Fan
影响因子：
1.8
作者：
Fanxue Meng;Huaiyu Xue;Tian Li;H. Yang;Fu-Lai Liu
通讯作者：
Fanxue Meng;Huaiyu Xue;Tian Li;H. Yang;Fu-Lai Liu
影响因子：
5
作者：
J. Vervoort;T. Plank;J. Prytulak
通讯作者：
J. Vervoort;T. Plank;J. Prytulak