id	keyword
esrj-52403	formation
esrj-52403	qixia
esrj-52403	sichuan
esrj-52403	carbon
esrj-52403	permian
esrj-52403	isotopic
esrj-52403	oxygen
esrj-52403	basin
esrj-52403	section
esrj-52403	qixia formation
esrj-52403	carbonates
esrj-52403	changjianggou
esrj-52403	samples
esrj-52403	chinese
esrj-52403	values
esrj-52403	qiaoting