adj.[地]超堿的；超基性的

Ultramafic hosted hydrothermal system;Southwest Indian Ridge. 超鎂鐵質(zhì)巖系熱液系統(tǒng);

Biotite is a subordinate constituent of the mafic and ultramafic rocks generally. 黑云母一般是鎂鐵質(zhì)及超鎂鐵質(zhì)巖石中的次要成分。

With regard to the oxide minerals, chromite is almost entirely contained in the olivine-rich ultramafic rocks in the lower part of the intrusion. 關(guān)于氧化礦物，鉻鐵礦幾乎全部含于侵入體下部的富橄欖石的超鎂鐵質(zhì)巖石中。

The Songsugou peridotite in Shangnan, Shaanxi Province is an important but petrogenetically debated ultramafic massif in the Qinling orogenic belt. 陜西商南縣松樹溝橄欖巖體是秦嶺造山帶中具重要意義和爭議較大的巖體。

Jiangyema chromite deposit lies in the Laangcuo rock body of which locates in the western Yaluzangbujiang ultramafic rock belt. 姜葉馬鉻鐵礦產(chǎn)于雅魯藏布江超鎂鐵質(zhì)巖帶的西段拉昂錯(cuò)巖體之中,為富鉻型豆莢狀鉻鐵礦。