|
Information and Service
|
|
| This Article | |
 |
Supporting info |
|
PDF(734KB) |
|
[HTML] |
|
Reference |
| Service and feedback | |
|
Add to Citation Manager |
|
Cite This Article |
|
Email Alert |
| Keywords | |
|
monzonite |
|
SHRIMP zircon U-Pb ages |
|
geochemistry |
|
Duocaima |
|
Qiangtang |
|
Qinghai |
| Authors | |
|
CHAO Wen-xin |
|
LI Bi-le |
|
YANG Wen-long |
|
PENG Bo |
|
NING Chuan-qi |
|
GAO Xiong-wei |
| PubMed | |
|
Article by Chao W |
|
Article by Li B |
|
Article by Yang W |
|
Article by Peng B |
|
Article by Ning C |
|
Article by Gao X |
SHRIMP zircon U-Pb ages and geochemistry of monzonite in Duocaima,Tuotuohe area,Qiangtang
CHAO Wen-xin1, LI Bi-le1, YANG Wen-long1, PENG Bo1, NING Chuan-qi1, GAO Xiong-wei2
1. College of Earth Sciences, Jilin University, Changchun 130061, China;
2. Jilin Bureau of Geology for Nuclear Industry, Changchun 130062, China
The Duocaima Pb-Zn deposit is located in the northeast margin of Qiangtang block of Qinghai.The authors undertook a detailed study of zircon U-Pb dating and geochemistry of the monzonite in Tuotuohe mining area.The results indicate that the monzonite is calc-alkaline to high-K calc-alkaline and aluminous,and is characterized by relatively high Na2O,low K2O and MgO.The samples have higher Rb/Sr(0.21~0.47),lower Nb/Ta(13.25~14.02),and low Mg#, etc.,indicating that the monzonite was derived from crust.The samples are enriched in LREE,LILE (e.g.,Rb,Ba,K,Sr),and active incompatible elements (e.g.,Th,U),and depleted in HFSE(e.g.,Nb,Ta,P,Ti),similar to the characteristics of volcanic arc magmas.The SHRIMP zircon U-Pb dating of the monzonite yields Late Cretaceous to Early Paleocene ages (65.8±1.1Ma).Combined with regional geological background,it is concluded that the monzonite was probably formed during the late stage of deep subduction of Tethys Oceanic Plate.