Knowledge Management System Of Guangzhou Institute of Geochemistry，CAS
| Cao, Yonghua1,2,3; Xing, Chang-Ming1,2,3 | |
| Textural relationships and mineral compositions of Fe-Ti oxide ores of the Panzhihua layered intrusion, SW China: Insights for magma emplacement and lateral extension of Fe-Ti oxide ore bodies | |
| Source Publication | JOURNAL OF ASIAN EARTH SCIENCES
 |
| ISSN | 1367-9120 |
| 2023-10-01 | |
| Volume | 255Pages:17 |
| DOI | 10.1016/j.jseaes.2023.105772 |
| Language | 英语 |
| WOS Research Area | Geology |
| Abstract | The Panzhihua gabbroic layered intrusion in the Emeishan large igneous province (SW China) hosts economically important Fe-Ti-(V) oxide ore deposits. The intrusion consists of six sections from northeast to southwest. To constrain the emplacement of parental magma across the sections and the magmatic processes associated with Fe-Ti oxide ore deposits, a combined study on field relations, rock textures, mineral compositions, and late-stage magmatic microstructure was carried out for the Fe-Ti oxide ores from the Zhujiabaobao, Lanjiahuoshan, Jianshan, and Nalaqing sections of the intrusion. A similar to 7-meter-thick ultramafic portion comprising peridotite, olivine-rich net-textured and massive ores is firstly recognized at the bottom of the Zhujiabaobao section in this investigation. The magnetite grains in the ultramafic portion are Cr-rich with 0.58 to 1.83 wt% Cr2O3, and may have crystallized from an earlier injection of Fe-Ti-Cr-rich magma. On the other hand, in the predominate clinopyroxene/plagioclase-rich net-textured to massive ores of the intrusion, the magnetite grains contain < 0.2 wt% Cr2O3, and may have crystallized from late injections of Fe-Ti-rich, Cr-depleted magma. We proposed that the parental magma may be emplaced into an originally "tilt-spoon" structure and initially unloaded in the Zhujiabaobao section, then infilled the Lanjiahuoshan to Jianshan sections and extended further to the Nalaqing section. The thick, massive Fe-Ti oxide ore layers in the lower part of the intrusion are attributed to the silicate immiscibility of interstitial liquid within the crystal mush, and the large amounts of Fe-Ti oxides likely crystallized from immiscible Fe-rich melt aggregated in the lower part of the magma chamber. |
| Keyword | Fe-Ti oxide ore Magnetite Plagioclase Late-stage reactive microstructure Panzhihua layered intrusion |
| WOS ID | WOS:001036285700001 |
| Indexed By | SCI |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.gig.ac.cn/handle/344008/74575 |
| Collection | 中国科学院矿物学与成矿学重点实验室 |
| Corresponding Author | Cao, Yonghua |
| Affiliation | 1.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Mineral & Metallogeny, Guangzhou 510640, Peoples R China 2.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China 3.Guangdong Prov Key Lab Mineral Phys & Mat, Guangzhou 510640, Peoples R China |
| Recommended Citation GB/T 7714 | Cao, Yonghua,Xing, Chang-Ming. Textural relationships and mineral compositions of Fe-Ti oxide ores of the Panzhihua layered intrusion, SW China: Insights for magma emplacement and lateral extension of Fe-Ti oxide ore bodies[J]. JOURNAL OF ASIAN EARTH SCIENCES,2023,255:17. |
| APA | Cao, Yonghua,&Xing, Chang-Ming.(2023).Textural relationships and mineral compositions of Fe-Ti oxide ores of the Panzhihua layered intrusion, SW China: Insights for magma emplacement and lateral extension of Fe-Ti oxide ore bodies.JOURNAL OF ASIAN EARTH SCIENCES,255,17. |
| MLA | Cao, Yonghua,et al."Textural relationships and mineral compositions of Fe-Ti oxide ores of the Panzhihua layered intrusion, SW China: Insights for magma emplacement and lateral extension of Fe-Ti oxide ore bodies".JOURNAL OF ASIAN EARTH SCIENCES 255(2023):17. |
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