Projects per year
Two groups of meta-calcsilicate rocks were distinguished, which originate from a metavolcanic-metasedimentary series. The respective bulk rock composition is a result of different proportions of source rock material involved. One group which is higher in CaO and lower in Na2O demonstrates a higher contribution material from a sedimentary source, whereas volcanoclastic to pyroclastic precursor dominates in the second group. The meta-calcsilicates are generally composed of Ca-bearing silicates with a peak preassure assemblage of Grt-Cpx-Zo-Am-Qz-Ttn; they experienced epidote amphibolite facies metamorphism constrained by P-T conditions of 580°C / 1.08–1.13 GPa. Late prehnite-, albite-, calcite- and actinolite-bearing veins refer to the subgreenschist conditions at the late exhumation stage.
In situ zircon U-Pb dating of 173 detrital zircons from the meta-calcsilicate rocks yield Archean ages up to 3.04 Ga; a further predominant age population clusters at ca. 2.68 Ga with subordinate clusters at ca. 2.87, 2.78, which are interpreted to represent magmatic ages. A subordinate cluster at 2.51 Ga associated with zircon rim domains reflects a metamorphic event. Further frequently textureless rims of zircon of an age range between ca. 2.5 and –2.1 Ga indicate subsequent metamorphic events. The deposition of the meta-calcsilicate precursors occurred around of shortly after 2.1 Ga on an Archaean basement.
FingerprintDive into the research topics of 'Petrology and zircon U–Pb dating of meta-calcsilicate from the Jiaobei terrane in the Jiao-Liao-Ji Belt of the North China Craton'. Together they form a unique fingerprint.
Data availability statement for 'Petrology and zircon U–Pb dating of meta-calcsilicate from the Jiaobei terrane in the Jiao-Liao-Ji Belt of the North China Craton'.
Li, X. (Creator), Wang, X. (Creator), Storey, C. (Creator), Kong, F. (Creator) & Schertl, H. (Creator), Elsevier BV, 4 May 2018