naa a22 4500 510754635 CHVBK 20180411083118.0 cr unu---uuuuu 180411e20130201xx s 000 0 eng 10.1007/s13131-013-0273-9 doi (NATIONALLICENCE)springer-10.1007/s13131-013-0273-9 Preliminary K-Ar geochronology of lavas from southern Lau Basin [Elektronische Daten] [Quanshu Yan, Xuefa Shi, Naisheng Li, Jingjing Gao, Tianyun Su] In this short note, we report the ages of five lava samples from a segment of the Eastern Lau Spreading Center (ELSC) and three samples from the Valu Fa Ridge (VFR) in the southern Lau Basin. These samples were collected in situ fromthe axes and flanks of the spreading centers in the basin. These ages provide a key to better understanding the spreading mode, crustal formation and overall tectonic evolution of the basin. Except for two basaltic andesites and one andesite, the lavas analyzed are basalts. The ages of the lavas from ELSC range from (1.45±0.15) Ma to (0.74±0.04) Ma whereas those from VFR range from (0.50±0.06) Ma to (0.32±0.27) Ma, and the basalts give the oldest ages. The relatively younger ages of the VFR lavas are consistent with proposed tectonic evolution of the southern Lau Basin, i.e., VFR is a propagating extension of ELSC. The occurence of older lavas close to or on spreading axes in the southern Lau Basin implies the complex tectonic evolution of the basin. These results underscore a need for further detailed geophysical and geological studies in the southern Lau Basin, in order to better clarify the crustal accretion tectonic evolution in this area. The Chinese Society of Oceanography and Springer-Verlag Berlin Heidelberg, 2013 K-Ar geochronology nationallicence Tectonic evolution nationallicence Eastern Lau spreading center nationallicence Valu Fa Ridge nationallicence Lau Basin nationallicence Yan Quanshu Key Laboratory of Marine Sedimentary and Environment Geology, The First Institute of Oceanography, State Oceanic Administration, 266061, Qingdao, China aut Shi Xuefa Key Laboratory of Marine Sedimentary and Environment Geology, The First Institute of Oceanography, State Oceanic Administration, 266061, Qingdao, China aut Li Naisheng Key Laboratory of Marine Sedimentary and Environment Geology, The First Institute of Oceanography, State Oceanic Administration, 266061, Qingdao, China aut Gao Jingjing Key Laboratory of Marine Sedimentary and Environment Geology, The First Institute of Oceanography, State Oceanic Administration, 266061, Qingdao, China aut Su Tianyun Key Laboratory of Marine Sedimentary and Environment Geology, The First Institute of Oceanography, State Oceanic Administration, 266061, Qingdao, China aut Acta Oceanologica Sinica The Chinese Society of Oceanography 32/2(2013-02-01), 18-23 0253-505X 32:2<18 2013 32 13131 https://doi.org/10.1007/s13131-013-0273-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s13131-013-0273-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yan Quanshu Key Laboratory of Marine Sedimentary and Environment Geology, The First Institute of Oceanography, State Oceanic Administration, 266061, Qingdao, China aut NATIONALLICENCE 700 1- Shi Xuefa Key Laboratory of Marine Sedimentary and Environment Geology, The First Institute of Oceanography, State Oceanic Administration, 266061, Qingdao, China aut NATIONALLICENCE 700 1- Li Naisheng Key Laboratory of Marine Sedimentary and Environment Geology, The First Institute of Oceanography, State Oceanic Administration, 266061, Qingdao, China aut NATIONALLICENCE 700 1- Gao Jingjing Key Laboratory of Marine Sedimentary and Environment Geology, The First Institute of Oceanography, State Oceanic Administration, 266061, Qingdao, China aut NATIONALLICENCE 700 1- Su Tianyun Key Laboratory of Marine Sedimentary and Environment Geology, The First Institute of Oceanography, State Oceanic Administration, 266061, Qingdao, China aut NATIONALLICENCE 773 0- Acta Oceanologica Sinica The Chinese Society of Oceanography 32/2(2013-02-01), 18-23 0253-505X 32:2<18 2013 32 13131 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer