TY - JOUR
T1 - Early Mesozoic tectono-magmatic activity and mineralization in northeast China
T2 - Evidence from Re-Os to U-Pb studies of the Taipingchuan porphyry Cu-Mo deposit in the Derbugan metallogenic belt
AU - Zhang, Lianchang
AU - Gao, Bingyu
AU - Li, Wenjun
AU - Chen, Zhiguang
AU - Sakyi, Patrick Asamoah
AU - Jin, Xindi
N1 - Publisher Copyright:
© 2014 Taylor & Francis.
PY - 2014/11/26
Y1 - 2014/11/26
N2 - The Taipingchuan Cu-Mo deposit is a recently discovered large porphyry deposit located in the north of the Derbugan metallogenic belt of northeastern China. The geochronological data of the deposit yielded a Late Triassic zircon U-Pb age of 202 ± 6 Ma from a granodiorite porphyry that hosts the Cu-Mo mineralization. Measured Re-Os isotopes of seven disseminated molybdenite samples yielded an isochron age of 200 ± 5 Ma with mean square of weighted deviates of 2.7, while those of seven veinlet molybdenite samples also produced an isochron age of 200.1 ± 2.5 Ma and mean square of weighted deviates of 3.3. These isochron ages show that a Cu-Mo mineralization event occurred at ca. 200 Ma. Based on regional tectonic evolution, we propose that the Late Triassic Cu-Mo mineralization of the host porphyry in the Derbugan metallogenic belt was mainly associated with the subduction of the Mongol-Okhotsk Ocean slab under the Ergun block, contrary to previous suggestion that it was related to the subduction of the Mesozoic Palaeo-Pacific plate.
AB - The Taipingchuan Cu-Mo deposit is a recently discovered large porphyry deposit located in the north of the Derbugan metallogenic belt of northeastern China. The geochronological data of the deposit yielded a Late Triassic zircon U-Pb age of 202 ± 6 Ma from a granodiorite porphyry that hosts the Cu-Mo mineralization. Measured Re-Os isotopes of seven disseminated molybdenite samples yielded an isochron age of 200 ± 5 Ma with mean square of weighted deviates of 2.7, while those of seven veinlet molybdenite samples also produced an isochron age of 200.1 ± 2.5 Ma and mean square of weighted deviates of 3.3. These isochron ages show that a Cu-Mo mineralization event occurred at ca. 200 Ma. Based on regional tectonic evolution, we propose that the Late Triassic Cu-Mo mineralization of the host porphyry in the Derbugan metallogenic belt was mainly associated with the subduction of the Mongol-Okhotsk Ocean slab under the Ergun block, contrary to previous suggestion that it was related to the subduction of the Mesozoic Palaeo-Pacific plate.
KW - Derbugan metallogenic belt
KW - Mongol-Okhotsk Ocean
KW - continental margin
KW - molybdenite Re-Os age
KW - porphyry Cu-Mo deposit
KW - zircon U-Pb age
UR - http://www.scopus.com/inward/record.url?scp=84919868875&partnerID=8YFLogxK
U2 - 10.1080/00206814.2014.963709
DO - 10.1080/00206814.2014.963709
M3 - Article
AN - SCOPUS:84919868875
SN - 0020-6814
VL - 56
SP - 1837
EP - 1851
JO - International Geology Review
JF - International Geology Review
IS - 15
ER -