These studies , therefore , suggest that the songsugou peridotite is not a tectonic massif of the upper mantle but a ultramafic magmatic rock body crystallized in deep crust and tectonically emplaced in the upper crust 從而證明了松樹(shù)溝橄欖巖體并不是上地幔巖石的殘片,而是由巖漿在深部地殼環(huán)境下結(jié)晶而成并以固態(tài)構(gòu)造侵位于地殼的上部。