Mineral Chemistry, S-Pb-O Isotopes, and S/Se Ratios of the Niubiziliang Ni-(Cu) Sulfide Deposit in North Qaidam Orogenic Belt, NW China: Constraints on the Parental Magma Composition, Evolution, and Sulfur Saturation Mechanism
The Niubiziliang Ni-(Cu) deposit is the first magmatic Ni-Cu sulfide deposit in the North Qaidam Orogenic Belt (NQOB), NW China, and plays a significant role in geological evolution, Ni-Cu mineralization, and exploration in the NQOB. Here, we report on the mineral chemistry, S-Pb-O isotopes, and S/S...
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doaj-950e7337e69049eb9d01dd6be96b92e12020-11-25T02:02:16ZengMDPI AGMinerals2075-163X2020-09-011083783710.3390/min10100837Mineral Chemistry, S-Pb-O Isotopes, and S/Se Ratios of the Niubiziliang Ni-(Cu) Sulfide Deposit in North Qaidam Orogenic Belt, NW China: Constraints on the Parental Magma Composition, Evolution, and Sulfur Saturation MechanismLiang Li0Fengyue Sun1Huiwen Liu2Shucheng Tan3Lu Yu4Fei Wang5Dali Shen6Xueping Wang7Yonggang Wang8Yunnan Key Laboratory of Statistical Modeling and Data Analysis, Department of Statistics, Yunnan University, Kunming 650500, ChinaCollege of Earth Sciences, Jilin University, Changchun 130061, ChinaThe Nuclear Industry Bureau of Qinghai Province, Xining 810008, ChinaSchool of Earth Sciences, Yunnan University, Kunming 650500, ChinaCollege of Earth Sciences, Jilin University, Changchun 130061, ChinaSchool of Computer and Information Engineering, Heilongjiang University of Science and Technology, Harbin 150022, ChinaThe Nuclear Industry Bureau of Qinghai Province, Xining 810008, ChinaThe Nuclear Industry Bureau of Qinghai Province, Xining 810008, ChinaThe Nuclear Industry Bureau of Qinghai Province, Xining 810008, ChinaThe Niubiziliang Ni-(Cu) deposit is the first magmatic Ni-Cu sulfide deposit in the North Qaidam Orogenic Belt (NQOB), NW China, and plays a significant role in geological evolution, Ni-Cu mineralization, and exploration in the NQOB. Here, we report on the mineral chemistry, S-Pb-O isotopes, and S/Se ratios of the mafic-ultramafic complex, which provide insights on the parental magma, evolution, and sulfur saturation mechanism. The Niubiziliang mafic-ultramafic intrusion contains four ore blocks and about ten Ni-(Cu) ore/mineralization bodies. Olivines in Niubiziliang belong to the species of chrysolite with Fo values of 88~89, and the pyroxenes are mainly orthopyroxene (En = 79~82) and clinopyroxene (En = 44~40). The olivines and some pyroxenes likely crystallized in a magma chamber at a depth of 35.45~36.55 km at a high temperature (1289~1369 °C) and pressure (9.38~9.67 kbar), whereas the Niubiziliang complex formed at a moderate depth (8.13~8.70 km) with a temperature and pressure of 1159~1253 °C and 2.15~2.30 kbar, respectively. The parental magma was considered to be high-Mg picritic basalt with MgO and NiO contents of 14.95~16.58% and 0.053~0.068%, respectively, which indicated high-degree partial melting of the depleted mantle. The mantle-derived primary magma underwent significant fractional crystallization and crustal assimilation and contamination, which was strongly supported by S-Pb-O isotope data and S/Se ratios, resulting in sulfur saturation and sulfide immiscibility in the magma. Crustal assimilation and contamination contributed more to sulfur saturation than fractional crystallization.https://www.mdpi.com/2075-163X/10/10/837mineral chemistryS/Se ratioscrustal contaminationNiubiziliang Ni-(Cu) sulfide depositNW China |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Liang Li Fengyue Sun Huiwen Liu Shucheng Tan Lu Yu Fei Wang Dali Shen Xueping Wang Yonggang Wang |
spellingShingle |
Liang Li Fengyue Sun Huiwen Liu Shucheng Tan Lu Yu Fei Wang Dali Shen Xueping Wang Yonggang Wang Mineral Chemistry, S-Pb-O Isotopes, and S/Se Ratios of the Niubiziliang Ni-(Cu) Sulfide Deposit in North Qaidam Orogenic Belt, NW China: Constraints on the Parental Magma Composition, Evolution, and Sulfur Saturation Mechanism Minerals mineral chemistry S/Se ratios crustal contamination Niubiziliang Ni-(Cu) sulfide deposit NW China |
author_facet |
Liang Li Fengyue Sun Huiwen Liu Shucheng Tan Lu Yu Fei Wang Dali Shen Xueping Wang Yonggang Wang |
author_sort |
Liang Li |
title |
Mineral Chemistry, S-Pb-O Isotopes, and S/Se Ratios of the Niubiziliang Ni-(Cu) Sulfide Deposit in North Qaidam Orogenic Belt, NW China: Constraints on the Parental Magma Composition, Evolution, and Sulfur Saturation Mechanism |
title_short |
Mineral Chemistry, S-Pb-O Isotopes, and S/Se Ratios of the Niubiziliang Ni-(Cu) Sulfide Deposit in North Qaidam Orogenic Belt, NW China: Constraints on the Parental Magma Composition, Evolution, and Sulfur Saturation Mechanism |
title_full |
Mineral Chemistry, S-Pb-O Isotopes, and S/Se Ratios of the Niubiziliang Ni-(Cu) Sulfide Deposit in North Qaidam Orogenic Belt, NW China: Constraints on the Parental Magma Composition, Evolution, and Sulfur Saturation Mechanism |
title_fullStr |
Mineral Chemistry, S-Pb-O Isotopes, and S/Se Ratios of the Niubiziliang Ni-(Cu) Sulfide Deposit in North Qaidam Orogenic Belt, NW China: Constraints on the Parental Magma Composition, Evolution, and Sulfur Saturation Mechanism |
title_full_unstemmed |
Mineral Chemistry, S-Pb-O Isotopes, and S/Se Ratios of the Niubiziliang Ni-(Cu) Sulfide Deposit in North Qaidam Orogenic Belt, NW China: Constraints on the Parental Magma Composition, Evolution, and Sulfur Saturation Mechanism |
title_sort |
mineral chemistry, s-pb-o isotopes, and s/se ratios of the niubiziliang ni-(cu) sulfide deposit in north qaidam orogenic belt, nw china: constraints on the parental magma composition, evolution, and sulfur saturation mechanism |
publisher |
MDPI AG |
series |
Minerals |
issn |
2075-163X |
publishDate |
2020-09-01 |
description |
The Niubiziliang Ni-(Cu) deposit is the first magmatic Ni-Cu sulfide deposit in the North Qaidam Orogenic Belt (NQOB), NW China, and plays a significant role in geological evolution, Ni-Cu mineralization, and exploration in the NQOB. Here, we report on the mineral chemistry, S-Pb-O isotopes, and S/Se ratios of the mafic-ultramafic complex, which provide insights on the parental magma, evolution, and sulfur saturation mechanism. The Niubiziliang mafic-ultramafic intrusion contains four ore blocks and about ten Ni-(Cu) ore/mineralization bodies. Olivines in Niubiziliang belong to the species of chrysolite with Fo values of 88~89, and the pyroxenes are mainly orthopyroxene (En = 79~82) and clinopyroxene (En = 44~40). The olivines and some pyroxenes likely crystallized in a magma chamber at a depth of 35.45~36.55 km at a high temperature (1289~1369 °C) and pressure (9.38~9.67 kbar), whereas the Niubiziliang complex formed at a moderate depth (8.13~8.70 km) with a temperature and pressure of 1159~1253 °C and 2.15~2.30 kbar, respectively. The parental magma was considered to be high-Mg picritic basalt with MgO and NiO contents of 14.95~16.58% and 0.053~0.068%, respectively, which indicated high-degree partial melting of the depleted mantle. The mantle-derived primary magma underwent significant fractional crystallization and crustal assimilation and contamination, which was strongly supported by S-Pb-O isotope data and S/Se ratios, resulting in sulfur saturation and sulfide immiscibility in the magma. Crustal assimilation and contamination contributed more to sulfur saturation than fractional crystallization. |
topic |
mineral chemistry S/Se ratios crustal contamination Niubiziliang Ni-(Cu) sulfide deposit NW China |
url |
https://www.mdpi.com/2075-163X/10/10/837 |
work_keys_str_mv |
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