The Mesozoic volcanic rocks in Lujiang-Zongyang district can be divided into four formations, from early to late, Longmenyuan, Zhuanqiao, Shuangmiao, Fushan. Their isotopic ages are in confusion. For example, the 11 d...The Mesozoic volcanic rocks in Lujiang-Zongyang district can be divided into four formations, from early to late, Longmenyuan, Zhuanqiao, Shuangmiao, Fushan. Their isotopic ages are in confusion. For example, the 11 dating data of Zhuanqiao Formation are between 135 Ma and 109 Ma, belonging to K<sub>1</sub>, whereas other 9 dating data are from 136 Ma to 178 Ma, belonging to J<sub>2</sub>—J<sub>3</sub>. Through the studies on Sm-Nd and Rb-Sr isotopic composition of the Bajiatan and Fanshan-Shimatan volcanic-intrusive rocks in the district, some significant data with regard to the ages and source materials of the volcanic-intrusive rocks have been acquired and published in this note.展开更多
基金Project supported by the National Natural Science Foundation of China
文摘The Mesozoic volcanic rocks in Lujiang-Zongyang district can be divided into four formations, from early to late, Longmenyuan, Zhuanqiao, Shuangmiao, Fushan. Their isotopic ages are in confusion. For example, the 11 dating data of Zhuanqiao Formation are between 135 Ma and 109 Ma, belonging to K<sub>1</sub>, whereas other 9 dating data are from 136 Ma to 178 Ma, belonging to J<sub>2</sub>—J<sub>3</sub>. Through the studies on Sm-Nd and Rb-Sr isotopic composition of the Bajiatan and Fanshan-Shimatan volcanic-intrusive rocks in the district, some significant data with regard to the ages and source materials of the volcanic-intrusive rocks have been acquired and published in this note.
