geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Geochronology, petrogenesis and tectonic implications of Jurassic granites in the Liaodong Peninsula, NE China


, : Geochronology, petrogenesis and tectonic implications of Jurassic granites in the Liaodong Peninsula, NE China. Chemical Geology 221(1-2): 127-156

Mesozoic igneous rocks are widespread throughout eastern China, but precise geochronological and petrogenetic constraints were previously lacking. Ten samples from the Liaodong Peninsula in northeastern China were chosen for zircon U-Pb SHRIMP and laser ablation ICP-MS dating. The magmatic ages range from 179+ or -3 to 156+ or -3 Ma. Data compilation indicates that contemporaneous granitic magmatism is widespread throughout eastern China, establishing the Jurassic as an important period of igneous activity in eastern China. Petrographically, these granites can be divided into three groups that underwent a complex history of crystal fractionation. Two end-members of granodioritic and monzogranitic magma are identified. The granodioritic rocks, having lower ( (super 87) Sr/ (super 86) Sr) (sub i) and higher epsilon (sub Nd) (t) values than those of the monzogranitic rocks, came from the partial melting of juvenile crust, whereas the monzogranitic rocks came from partial melting of the Precambrian basement. It is proposed that Pacific plate subduction resulted in crustal thickening and subsequent lithospheric delamination which resulted in the upwelling of asthenospheric mantle and formation of juvenile crust by underplating of mantle-derived magma in the lower crust. A subsequent underplating and heating event from the asthenosphere partially melted the overlying pre-existing underplated mafic rocks and ancient crust, leading to the formation of granodioritic and monzogranitic magmas. This thickening by subduction could have been a necessary precursor for limited delamination in the Jurassic and more extensive delamination in the Early Cretaceous.

US$19.90

DOI: 10.1016/j.chemgeo.2005.04.010


Other references

Shi, Yuexian; Schrier, Robert W.; Edelstein, Charles L., 1998: The role of caspases in hypoxia -induced rat renal proximal tubular injury. Journal of the American Society of Nephrology 9(PROGRAM AND ABSTR ISSUE): 587A, Sept

Ritchie, L.R.; Webster, R.G.; Laver, W.G.; Air, G.M., 1987: Heterogeneity of neuraminidase genetic information in an H1N2 reassortant influenza virus [X-7 (F1)]. Brief report. cDNA clones of the neuraminidase gene from the reassortant influenza virus X-7 (F 1) have different sequences. Some clones are more closely related to A/Tokyo/67 neuraminidase than to the A/RI/5+/57 NA gene from which the NA of X-7 (F 1) was deriv...

Borson-Chazot, F., 2006: Radiotherapie metabolique des tumeurs endocrines gastro-entero-pancreatiques par les analogues radio-marques de la somatostatine. Surgery is the only curative treatment of gastro-entero-pancreatic endocrine tumors. In inoperable or metastasized forms, therapeutic options are limited. The metabolic or systemic radiotherapy, using radiolabeled somatostatin analogs, constitutes...

Bhat, G.J.; Baker, K.M., 1999: Cross-talk between angiotensin II and interleukin-6-induced signaling through Stat3 transcription factor. In cultured neonatal rat cardiac fibroblasts and CHO-K1 cells expressing angiotensin II (Ang II) type 1 receptors (AT1) (T3CHO/AT1A cell line), Ang II induced a delayed tyrosine phosphorylation of Stat3 (Signal Transducers and Activators of Transc...

Huang, Y-Can.; Yang, Z-Ming.; Jiang, N-Gang.; Chen, X-He.; Li, X-Qun.; Tan, M-Yun.; Zhou, K-Peng.; Tang, L.; Xie, H-Qi.; Deng, L., 2010: Characterization of MSCs from human placental decidua basalis in hypoxia and serum deprivation. Recently, we reported that human PDB (placental decidua basalis) is an excellent source of MSCs (mesenchymal stem cells), meanwhile, PDB-MSCs could survive under hypoxia and serum deprivation. Herein, we investigated the proliferation, clonogentic...

King, D.I.; Rappole, J.H.; Buonaccorsi, J.P., 2006: Long-term population trends of forest-dwelling Nearctic-Neotropical migrant birds: a question of temporal scale. Analyses of trends in the populations of nearctic-neotropical migrant birds using 1930s-1960s data have indicated declines in many cases. More recent reports, however, suggest that populations of most forest-dwelling migrants are stable or increas...

Chiou, S-Fen.; Chuang, J-Hsiang., 2011: Only automated surveillance with 100% sensitivity can save ICPs' time. American Journal of Infection Control 39(4): 346-346

Johnson, M.H., 1980: Systemic lupus erythematosus: a diagnosis in retrospect. Dental Survey 56(7): 32-33

Krasnov, A.F., 1970: Surgery in habitual dislocation of the shoulder. Khirurgiia 46(9): 85-89

Szabó, A.E.; Stájer, G.; Vinkler, E., 1974: Identification and determination of thiamazole. Die Pharmazie 29(9): 615-615