Using multiple methods to better constrain the depositional age of a meta-sedimentary succession: An example of the Laoling Group from the northeastern North China Craton

Liu, Chaohui; Liu, Fulai; Zhao, Guochun; Tian, Zhonghua; Cai, Jia; Zhu, Jun; Sun, Xingming

doi:10.1016/j.precamres.2023.107058

Cited by 2 publications

(5 citation statements)

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“…The Nangrim Block, located in southern Liaoning Province and in North Korea, is composed of Neoarchean granitoid and supracrustal rocks [55][56][57][58]. The JLJB mainly consists of Paleoproterozoic granitoids, metamafic intrusions and voluminous metavolcanic-metasedimentary successions with variable metamorphic grades ranging from greenschist to amphibolite facies and locally granulite facies [13,15,18,[21][22][23]25,29,31,32,38,45,59].…”

Section: Geological Backgroundmentioning

confidence: 99%

“…The early Paleoproterozoic tectonic evolution of the JLJB has long been controversial [13,14,24,32,33]. Therefore, contemporaneous magmatic rocks can provide valuable insights into this issue.…”

Section: Tectonic Implicationsmentioning

confidence: 99%

“…The JLJB underwent polyphase structural deformation, magmatism, metamorphism and sedimentation during the Paleoproterozoic orogenesis [18][19][20][21][22][23][24] (Figure 1b). Although numerous geochronological, geochemical, metamorphic, and structural studies have been carried out in the JLJB [13,19,22,[24][25][26][27][28][29][30][31][32], its tectonic evolution during the Paleoproterozoic remains highly controversial [21,22,24,32,33]. Currently, there are three main tectonic models: (1) the first model involves oceanic subduction and arc/continent-continent collision between the Longgang and Nangrim blocks [27,30,[34][35][36][37][38][39]; (2) the second model suggests the opening and closure of an intra-continental rift for the tectonic evolution of the JLJB [13,14,25,[40][41][42]; (3) the third model proposes that the JLJB experienced early intracontinental rift and subsequent oceanic subduction and collision [3,17,…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, increasingly studies suggest an extension tectonic regime for the JLJB during the early Paleoproterozoic (ca. 2.2-2.1 Ga) [14,21,22,31,32,38,[43][44][45][46]. However, there is still a key dispute whether such an extension is a consequence of back-arc basin or intra-continental rift [22,24,32,38,43,44,46].…”

Section: Introductionmentioning

confidence: 99%

“…2.2-2.1 Ga) [14,21,22,31,32,38,[43][44][45][46]. However, there is still a key dispute whether such an extension is a consequence of back-arc basin or intra-continental rift [22,24,32,38,43,44,46]. Therefore, the ca.…”

Section: Introductionmentioning

confidence: 99%

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Petrogenesis of the Early Paleoproterozoic Felsic Metavolcanic Rocks from the Liaodong Peninsula, NE China: Implications for the Tectonic Evolution of the Jiao-Liao-Ji Belt, North China Craton

Cheng,

Liu,

Zhang

et al. 2023

Minerals

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The early Paleoproterozoic (ca. 2.2–2.1 Ga) tectonic evolution of the Jiao–Liao–Ji belt (JLJB) is a continuous hot topic and remains highly controversial. Two main tectonic regimes have been proposed for the JLJB, namely arc-related setting and intra-continental rift. Abundant ca. 2.2–2.1 Ga volcanic rocks were formed in the JLJB, especially in the Liaodong Peninsula. These ca. 2.2–2.1 Ga volcanic rocks therefore could host critical information for the evolution of the JLJB. In this study, we report a suit of ca. 2.2–2.1 Ga felsic metavolcanic rocks in the Liaodong Peninsula of the JLJB to provide new insights into the above issue. Zircon U-Pb dating reveals that the felsic metavolcanic rocks were erupted at 2185–2167 Ma. They have variable εHf(t) values (−0.70 to +9.69), high SiO2 (66.30–75.30 wt.%) and relatively low TiO2 (0.03–0.78 wt.%), tFe2O3 (0.55–5.03 wt.%), MgO (0.17–8.76 wt.%), Cr (9.16–67.30 ppm), Co (2.01–7.00 ppm) and Ni (3.90–25.70 ppm) contents with enrichments in light rare earth element (REE) and large ion lithophile element (LILE), and depletions in heavy REE and high field strength element (HFSE). Geochemical and isotopic results indicate that the felsic metavolcanic rocks were sourced from partial melting of ancient Archean TTG rocks and juvenile lower crustal materials. Combined with coeval A-type granites, bimodal volcanic rocks and the absence of typical arc magmatism, the most likely tectonic regime at ca. 2.2–2.1 Ga for the JLJB is an intra-continental rift.

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