Zircon U-Pb Age and Geochemical Characteristics of Ore-bearing Granodiorite Porphyry in the Duobuza Porphyry Copper Deposit, Tibet

被引：5

作者：

Fei, Guangchun ^{[1
,2
]}

Zhou, Xiong ^{[3
]}

Duo, Ji ^{[4
]}

Zhou, Yu ^{[2
,3
]}

Wen, Chun-Qi ^{[2
]}

Wen, Quan ^{[2
]}

He, Yangyang ^{[2
]}

Huo, Yan ^{[2
]}

Yang, Zhengxi ^{[2
]}

Zhang, Jinshu ^{[4
]}

Liu, Hongfei ^{[4
]}

机构：

[1] Chengdu Univ Technol, Minist Land & Resources, Key Lab Tecton Controls Mineralizat & Hydrocarbon, Chengdu 610059, Peoples R China

[2] Chengdu Univ Technol, Coll Earth Sci, Chengdu 610059, Sichuan, Peoples R China

[3] Chinese Acad Geol Sci, Inst Multipurpose Utilizat Mineral Resource, Chengdu 610041, Peoples R China

[4] Geol & Mineral Resources Explorat Bur Tibet, Lasa, Tibet, Peoples R China

来源：

JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA | 2015年 / 86卷 / 02期

关键词：

Granodiorite Porphyry; zircon LA-ICP-MS U-Pb age; Duobuza; tectonic setting; Tibet; HIGH-TEMPERATURE; HF ISOTOPES; BELT; ARC; CONSTRAINTS; SUBDUCTION; CHEMISTRY; ADAKITE; MAGMAS; FLUID;

D O I：

10.1007/s12594-015-0302-8

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The Duobuza deposit is the first porphyry-type copper deposit discovered with giant prospect in the Bangongco metallogenic belt. Geochemical data indicates that the ore-bearing Duobuza granodiorite porphyry is high-K calc-alkaline to shoshonitic and peraluminous composition. The ore-bearing granodiorite porphyry is enriched in large-ion lithophile elements(LILE) such as Rb, K, Th, La, Ce and Sr, and depleted in high-field-strength elements(HFSE) such as Nb, Ta, P, and Ti. The rare-earth element (REE) patterns show enrichment in light REEs relative to heavy REEs. The major, rareearth, and trace elements of the ore-bearing granodiorite porphyry show characteristics of adakites, formed in an island arc setting. The laser ablation inductively coupled plasma-mass spectrometry (LA-ICP-MS) zircon U-Pb age of the orebearing granodiorite porphyry is 123.4 +/- 1.2 Ma (MSWD = 1.7), which also represents the age of the copper-mineralization. Together with the age data of the early Cretaceous magmatic rocks in the Bangongco-Nujiang suture zone and the middle-northern Gangdese, it indicates that there was bidirectional (northward and southward) subduction of the Bangongco-Nujiang ocean during 120 Ma, and the Duobuza deposit was related to this event.

引用

页码：223 / 232

页数：10

共 44 条

[1]

[Anonymous], 1989, EARTH PLANET SCI LET, DOI DOI 10.1016/0012-821X(89)90079-4

[2]

[Anonymous], 1997, Geological-Tectonic Evolution in the Eastern Tethys

[3] PETROGENETIC INTERPRETATION OF GRANITOID ROCK SERIES USING MULTICATIONIC PARAMETERS [J].