臺灣博碩士論文加值系統

中國西北北祁連東段老虎山地區出露有中晚奧陶紀的堆覆型蛇綠岩套,其
岩石產出次序與種類符合1972年美國地質學會彭羅斯會議所定義的蛇綠
岩.根據岩石學研究與地球化學的分析,老虎山蛇綠岩在中奧陶紀時為一快
速擴張型擴張脊,並且在晚奧陶紀時形成一正常型的中洋脊.

A Middle-late Ordovician period ophiolite is well exposed in
Laohushan area,a part of the North Qilian Mountains.It is fits
the definition by GSA Penrose Conference in 1972.According the
analysis data from petrology and geochemistry, we suggest that
the Laohushan ophiolite should be developed in a kind of N-MORB
envinoment.