Details

Autor(en) / Beteiligte

• Yang, Junlong
• Wang, Chao
• Jin, Zhenmin

Titel

Crystallization of Hydrous Ti-Rich Basaltic Magma and Its Implication for the Origin of Fe−Ti Oxide in Layered Intrusions of the Emeishan Large Igneous Province

Ist Teil von

• Journal of earth science (Wuhan, China), 2022-04, Vol.33 (2), p.507-512

Ort / Verlag

Wuhan: China University of Geosciences

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• A series of crystallization experiments have been carried out by using natural Emeishan Ti-rich hydrous basalts as starting materials at a pressure of 0.5 GPa and temperatures of 800–1 000 °C to constrain the origin of Fe−Ti−V oxide ore deposits. Our experimental results demonstrate that the sandwich- and trellis-type ilmenite lamellae in titanomagnetite of layered intrusions can be formed by the reaction of earlier crystallized ilmenite and the evolved parental magma. During evolution of parental basaltic magma, the Fe−Ti oxide should be composed of titanomagnetite+ilmenite in the earlier stage, but changed to titanomagnetite+titanomagnetite-ilmenite intergrowth±ilmenite at the later stage. Accordingly, the Panzhihua Fe−Ti oxide ores, which are mainly composed of titanomagnetite, should be formed earlier than the adjacent gabbro, in which titanomagnetite-ilmenite intergrowth is the major form of the Fe-Ti oxide.