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

Mesozoic mafic dikes from the Shandong Peninsula, North China Craton; petrogenesis and tectonic implications


, : Mesozoic mafic dikes from the Shandong Peninsula, North China Craton; petrogenesis and tectonic implications. Geochemical Journal 40(2): 181-195

Mesozoic mafic dikes are widely distributed in Luxi (Mengyin and Zichuan) and Jiaodong regions of the Shandong Peninsula, China, providing an opportunity of investigating the nature of the lost lithospheric mantle beneath the North China Craton (NCC). The mafic dikes are characterized by strong depletion in high field strength elements (HFSE), enrichment in light rare earth elements (LREE), highly variable Th/U ratios, high initial ( (super 87) Sr/ (super 86) Sr) (sub i) (0.7050-0.7099) and negative epsilon (sub Nd) (T)(-6.0 to-17.6). They were derived from melting of metasomatized portions of the subcontinental lithospheric mantle, followed by fractionation of clinopyroxenes. The similarity in Nd isotopic compositions between the Mengyin gabbro dikes and the Paleozoic peridotite xenoliths suggests that ancient lithospheric mantle was still retained at 120 Ma below Mengyin, although the ancient lithospheric mantle in many other places beneath NCC had been severely modified. There might be multiple enrichment events in the lithospheric mantle. An early-stage (before or during Paleozoic) rutile-rich metasomatism affected the lithospheric mantle below Mengyin, Jiaodong and Zichuan. Since then, the lithospheric mantle beneath Mengyin was isolated. A late-stage metasomatism by silicate melts modified the lithospheric mantle beneath Jiaodong and Zichuan but not Mengyin. The removal of the enriched lithospheric mantle and the generation of the mafic dikes may be mainly related to the convective overturn accompanying Jurassic-Cretaceous subduction of the paleo-Pacific plate.

US$29.90


Other references

Brooks N.A.; Matson R.R., 1981: Multiple sclerosis follow up study of social psychological adjustment. Archives of Physical Medicine & Rehabilitation 62(10): 525

Draczynska, B.; Cagara, C.; Siewinski, A.; Rymkiewicz, A.; Zabza, A.; Leufven, A., 1985: Biotransformation of pinenes xvii. transformation of alpha pinenes and beta pinenes by armillariella mellea honey fungus a parasite of woodlands. A culture of Armillariella mellea species was adapted to carry out microbial transformations of (+), (-), and (.+-.)-.alpha.-pinene ((+) 1), ((-) 1), and ((.+-.) 1) and (-)-.beta.-pinene ((-)2). The composition of products obtained indicated that...

Mauer, M.M.; Bartness, T.J., 1995: A role for testosterone in the maintenance of seasonally appropriate body mass but not in lipectomy-induced body fat compensation in Siberian hamsters. The purpose of this study was to test whether serum testosterone (T) concentrations characteristic of reproductively active, long-day-housed Siberian hamsters are necessary for compensatory increases in nonexcised fat pads following removal of epi...

Chapard, C.; Mesnard, P.; Bancons, C., 1970: On the determination of diphesatine. Application to a syrup. Annales Pharmaceutiques Francaises 28(7): 512-524

Previattelli, D.; dos Santos-Silva, E.N.lson, 2007: A new Argyrodiaptomus Copepoda Calanoida Diaptomidae from the southwestern Brazilian Amazon. Argyrodiaptomus paggii n. sp. is described from specimens collected in the Igarape Boa Esperanca, in the vicinity of the Samuel Reservoir, State of Rondonia, Brazil. The new species differs from its congeners by the following autapomorphies: (1) S...

Weisbrot, D.M.; Gadow, K.D.; Nolan, E.E.; Lenn, N.J.; Andriola, M.R.; Vitale, S.A.; Eng, W.; Hermann, B.P.; Ettinger, A.B., 1997: Psychiatric disturbances in pediatric patients with epilepsy and patients with attention-deficit hyperactivity disorder. Epilepsia 38(SUPPL 8): 155

Cryer P.E., 1986: Adrenergic mechanisms in glucoregulation. Christensen, N. Henriksen And N. A. Lassen (ed.). Proceedings Of The Alfred Benzon Symposium, 23. The Sympathoadrenal System: Physiology And Pathophysiology; Copenhagen, Denmark, Aug. 25-29, . 511p. Munksgaard: Copenhagen, Denmark (dist. In North And South America By Raven Press: New York, N.y., Usa; Dist. In Japan By Nankodo: Tokyo, Japan). Illus. 431-438

Yamamichi, N.; Shimamoto, T.; Minatsuki, C.; Yoshida, Y.; Fujishiro, M.; Kodashima, S.; Kato, J.; Goto, O.; Ono, S.; Niimi, K.; Takahashi, Y.; Konno-Shimizu, M.; Ichinose, M.; Koike, K., 2012: Postprandial fullness correlates with rapid inflow of gastric content into duodenum but not with chronic gastritis. The aim of this study is evaluating the correlation of postprandial fullness with chronic gastritis or rapid inflow of gastric content into duodenum, based on double-contrast barium X-ray imaging. <a name="ASec2_689"></a>Meth...

Liu, X.; Wang, Y.; Sun, Q.; Yan, J.; Huang, J.; Zhu, S.; Yu, J., 2012: Identification of microRNA transcriptome involved in human natural killer cell activation. Natural killer (NK) cells are an important component of the innate immune system that recognizes and kills virally infected and malignant cells. MicroRNAs (miRNAs) are short non-coding RNAs that have emerged as critical regulators of gene expressi...

Tomasz, M., 1976: Hydrogen per oxide generation during the redox cycle of mitomycin c and dna bound mitomycin c. Reduction of mitomycin C by NaBH4 or by NADPH in the presence of [Diplococcus pneumoniae] cell extract followed by exposure to air results in the generation of H2O2. This phenomenon occurs not only with free mitomycin but also with mitomycin irrev...