Guo-Long Yan
Research Subjects
Guo-Long Yan has a total of 7 co-authors. Here are the top co-authors by number of shared publications:
- Chun-Ting Xu
State Key Laboratory of Geological Processes and Mineral Resources, Frontiers Science Center for Deep-time Digital Earth, School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China
1 shared publication - Hao-Cheng Yu
State Key Laboratory of Geological Processes and Mineral Resources, Frontiers Science Center for Deep-time Digital Earth, School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China
1 shared publication - Jin-Shuai Zhang
State Key Laboratory of Geological Processes and Mineral Resources, Frontiers Science Center for Deep-time Digital Earth, School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China
1 shared publication - Lian-Yuan Qin
Shandong Yantai Xintai Gold Mining Industry Co., Ltd., Yantai 265147, China
1 shared publication - Ming Ma
No. 1 Institute of Geology and Mineral Resources of Shandong Province, Jinan 250100, China
1 shared publication - Tao Cui
State Key Laboratory of Geological Processes and Mineral Resources, Frontiers Science Center for Deep-time Digital Earth, School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China
1 shared publication
Latest Publications
- Open Access
Genesis of the Longkou Gold Deposit in the Northeastern Jiaolai Basin: Constraints from Sericite Rb-Sr Geochronology and Pyrite Geochemistry
Whether the genesis of gold deposits in the Northeastern Jiaolai Basin is consistent with that in the Northwestern Jiaodong area remains controversial. This study presents in situ Rb-Sr dating of sericite, along with in situ trace element and sulfur isotope analyses of pyrite in the Longkou gold deposit. The sericite Rb-Sr inverse isochron yields an age of 120.9 ± 2.4 Ma, indicating that gold mineralization occurred in the Early Cretaceous. Two generations of pyrite, Py1 and Py2, were identified. Py1 is anhedral and hosted in relatively low-grade, weakly altered marble wall rock. Py2 is euhedral to subhedral and hosted in relatively high-grade, strongly altered marble ore. The δ34S value of Py1 is 7.38‰, whereas that of Py2 is 6.79‰. The decrease in δ34S values from Py1 to Py2 reflects an increase in the oxygen fugacity of the ore-forming system. These features suggest that fluid–rock interaction led to an increase in oxygen fugacity, thereby triggering gold precipitation. The mineralization age and precipitation mechanism of the Longkou gold deposit are consistent with those of the Northwestern Jiaodong area. The Longkou gold deposit is best classified as a Jiaodong-type gold deposit.
Open AccessGenesis of the Longkou Gold Deposit in the Northeastern Jiaolai Basin: Constraints from Sericite Rb-Sr Geochronology and Pyrite Geochemistry
Whether the genesis of gold deposits in the Northeastern Jiaolai Basin is consistent with that in the Northwestern Jiaodong area remains controversial. This study presents in situ Rb-Sr dating of sericite, along with in situ trace element and sulfur isotope analyses of pyrite in the Longkou gold deposit. The sericite Rb-Sr inverse isochron yields an age of 120.9 ± 2.4 Ma, indicating that gold mineralization occurred in the Early Cretaceous. Two generations of pyrite, Py1 and Py2, were identified. Py1 is anhedral and hosted in relatively low-grade, weakly altered marble wall rock. Py2 is euhedral to subhedral and hosted in relatively high-grade, strongly altered marble ore. The δ34S value of Py1 is 7.38‰, whereas that of Py2 is 6.79‰. The decrease in δ34S values from Py1 to Py2 reflects an increase in the oxygen fugacity of the ore-forming system. These features suggest that fluid–rock interaction led to an increase in oxygen fugacity, thereby triggering gold precipitation. The mineralization age and precipitation mechanism of the Longkou gold deposit are consistent with those of the Northwestern Jiaodong area. The Longkou gold deposit is best classified as a Jiaodong-type gold deposit.