Precise age determination of mafic and felsic intrusive rocks from the Permian Emeishan large igneous province (SW China)

The Early Permian Tarim Large Igneous Province: Main characteristics and a plume incubation model

“…4 and 5). This is different from the Emeishan LIP, where extrusive and intrusive rocks are essentially coeval and share a similar source (Shellnutt et al, 2012;Xu et al, 2008;Zhong et al, 2011). …”

“…The Permian is marked by the presence of four LIPs that cluster in eastern Asia, namely the Siberian traps (251 Ma, Kamo et al, 2003), Emeishan basalts (~260 Ma, He et al, 2007;Shellnutt et al, 2012;Xu et al, 2008;Zhong et al, 2014;Zhou et al, 2002), Tarim basalts (280-290 Ma, Wei et al, 2014) and Panjal traps (~290 Ma; Shellnutt et al, 2014). Interestingly, a number of major global events occurred almost simultaneously during the late Paleozoic, including the double (Permian-Triassic and end-Guadalupian) mass extinctions, ocean superanoxia, sharp C and Sr isotopic excursions, sea-level drop and Illawara geomagnetic reversal (Borisenko et al, 2006;Isozaki, 2009).…”

Mantle origin of the Emeishan large igneous province (South China) from the analysis of residual gravity anomalies

“…The total age span of the Emeishan basalts has been estimated to be in the range of 251-263 Ma , but more recent chronological studies suggest that the Emeishan volcanics were emplaced during a very short period (b2 m.y.) at~259 Ma (Shellnutt et al, 2012; submitted for publication).…”

Igneous Rock Associations 16. The Late Permian Emeishan Large Igneous Province

“…In spite of its stature as a 'smaller' large igneous province, the ELIP is an important geological feature of SW China, not only because it hosts a number of Fe-Ti-V oxide and Ni-Cu-(PGE) sulphide deposits, but is also contemporaneous with the latest period of the Late Capitanian-Early Wuchiapingian mass extinction (i.e. end-Guadalupian) indicating that there may be a link between the two (Zhou et al 2002a;Ganino and Arndt 2009;Sun et al 2010;Shellnutt et al 2012). Beyond the economic and biogeological significance, the ELIP contains a diverse set of volcanic and plutonic igneous rocks (i.e.…”

“…The range of dates may, in fact, be an artifact of different radiometric methods used (c.f. Shellnutt et al 2012), misinterpreting rocks, poor data processing and the rock type (i.e. volcanic vs. plutonic).…”