Contrasting magmatic controls on the genesis of Fe-Ti-V oxide deposits in the Emeishan large igneous province using apatite Sr-Nd isotopes and apatite-zircon trace elements

被引：4
|
作者：
Tang, Qingyan [1 ,2 ]
Li, Chusi [3 ,4 ]
Liu, Cong [1 ,2 ]
Xue, Shengchao [5 ]
Xu, Shihai [1 ,2 ]
Zhang, Yan [1 ,2 ]
Li, Zhuoming [1 ,2 ]
Bao, Jian [1 ,2 ]
Song, Hong [1 ,2 ,6 ,7 ]
机构：
[1] Lanzhou Univ, Sch Earth Sci, Minist Nat Resources, Lanzhou 730000, Peoples R China
[2] Lanzhou Univ, Key Lab Mineral Resources Western China Gansu Prov, Key Lab Strateg Mineral Resources Upper Yellow Riv, Minist Nat Resources, Lanzhou 730000, Peoples R China
[3] Chinese Acad Sci, Inst Geochem, State Key Lab Ore Deposit Geochem, Guiyang 550002, Peoples R China
[4] Indiana Univ, Dept Geol & Atmospher Sci, Bloomington, IN 47405 USA
[5] China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China
[6] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China
[7] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
MINERALIUM DEPOSITA | 2023年 / 58卷 / 07期
基金：
中国国家自然科学基金;
关键词：
Apatite-zircon; Trace elements; Sr-Nd isotopes; Fe-Ti-V mineralization; Emeishan large igneous province; ULTRAMAFIC LAYERED INTRUSIONS; RARE-EARTH-ELEMENTS; SW CHINA IMPLICATIONS; LA-ICP-MS; U-PB; OCEANIC-CRUST; MAFIC INTRUSIONS; BUSHVELD COMPLEX; OXIDATION-STATE; PARENT MAGMA;
D O I：
10.1007/s00126-023-01180-0
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
We use Sr-Nd isotopes of apatite and trace element compositions of apatite-zircon pairs from a major ore layer in each of three selected magmatic Fe-Ti-V oxide ore deposits (Hongge, Panzhihua, and Taihe) in the Emeishan large igneous province (LIP) in southwestern China to contrast the magmatic controls on ore formation. The average contents of REEs in apatite from a representative ore zone/layer in each of these deposits are higher than the predicted values of apatite crystallizing from a melt with REE contents assumed to be the same as the average values of high-Ti basalts in the Emeishan LIP, confirming that the ore-forming magmas all experienced higher degrees of fractional crystallization by major silicate minerals than the average basalt. The apatites Sm/Yb and Sr/Y indicate that the Panzhihua magma was generated at a shallower depth and experienced higher degree of plagioclase fractional crystallization than Taihe and Hongge. The apatite Sr-Nd isotopes can be reproduced by similar to 8 wt% contamination with Precambrian gneiss-schist in the parental magma for Hongge and by similar to 10 wt% and similar to 25 wt% contamination with marbles in the parental magmas for Panzhihua and Taihe, respectively. A recycled, high-T altered oceanic gabbroic component in the mantle source is a viable alternative to the marble contamination model for Taihe. Coexisting zircon trace element compositions reveal that the parental magma for Taihe (Delta FMQ+4.0) is more oxidized than those for Hongge (Delta FMQ-0.4) and Panzhihua (Delta FMQ-0.7), questioning that magma oxidation played a critical role in the genesis of Fe-Ti-V oxide ore deposits in the Emeishan LIP.
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页码：1279 / 1296
页数：18
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