TY - JOUR
T1 - Genesis of the 1.21 Ga Marnda Moorn large igneous province by plume-lithosphere interaction
AU - Wang, X.
AU - Li, Z.
AU - Li, J.
AU - Pisarevsky, Sergei
AU - Wingate, Michael
PY - 2014/2
Y1 - 2014/2
N2 - The 1.21Ga Marnda Moorn large igneous province (LIP) of the Yilgarn Craton is important for understanding the final breakup of the Nuna (Columbia) supercontinent. However, its petrogenesis is poorly understood owing to the lack of geochemical data. We conducted geochemical analyses of the Gnowangerup-Fraser Dyke Suite, a major part of the Marnda Moorn LIP, and report the first geochemical and Nd isotope data for this LIP. Results of a complementary paleomagnetic study of these dykes will be published elsewhere. Most of the studied dykes consist of predominately tholeiitic and OIB-like dolerite (Group 1) and one arc-like and more felsic dyke (Group 2). Group 1 samples have incompatible trace element compositions similar to those of tholeiitic Hawaiian plume-induced OIB and typical asthenospheric mantle-derived Nd isotopes with eNd(t) varying from +3.7 to +7.5, produced mainly within the spinel stability field (
AB - The 1.21Ga Marnda Moorn large igneous province (LIP) of the Yilgarn Craton is important for understanding the final breakup of the Nuna (Columbia) supercontinent. However, its petrogenesis is poorly understood owing to the lack of geochemical data. We conducted geochemical analyses of the Gnowangerup-Fraser Dyke Suite, a major part of the Marnda Moorn LIP, and report the first geochemical and Nd isotope data for this LIP. Results of a complementary paleomagnetic study of these dykes will be published elsewhere. Most of the studied dykes consist of predominately tholeiitic and OIB-like dolerite (Group 1) and one arc-like and more felsic dyke (Group 2). Group 1 samples have incompatible trace element compositions similar to those of tholeiitic Hawaiian plume-induced OIB and typical asthenospheric mantle-derived Nd isotopes with eNd(t) varying from +3.7 to +7.5, produced mainly within the spinel stability field (
U2 - 10.1016/j.precamres.2013.11.008
DO - 10.1016/j.precamres.2013.11.008
M3 - Article
SN - 0301-9268
VL - 241
SP - 85
EP - 103
JO - Precambrian Research
JF - Precambrian Research
ER -