当前位置：
X-MOL 学术
›
Gondwana Res.
›
论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
High-silica rhyolites in the terminal stage of massive Cretaceous volcanism, SE China: Modified crustal sources and low-pressure magma chamber
Gondwana Research ( IF 6.1 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.gr.2020.10.007 Xi-Yao Li , Sanzhong Li , Yanhui Suo , Feng Huang , Pengcheng Wang , Shaorong Luan , Jie Zhou
Gondwana Research ( IF 6.1 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.gr.2020.10.007 Xi-Yao Li , Sanzhong Li , Yanhui Suo , Feng Huang , Pengcheng Wang , Shaorong Luan , Jie Zhou
|
Abstract Late Cretaceous felsic volcanism erupted as calderas in the terminal stage of the massive Cretaceous volcanism in SE China. This paper reports comprehensive geochemical and isotopic data for high-silica rhyolites from the Shiniushan and Xiaoxiong calderas in eastern Fujian–Zhejiang provinces, SE China. Zircon U Pb dating constrains these rhyolites eruptions to 94–92 Ma and 93–89 Ma in the sites of the two calderas. All the samples possess high-silica contents with peraluminous characteristics and are enriched in light rare earth elements (LREEs), Rb, and Th U and depleted in Ba, Nb Ta, Sr and Eu. These samples have high whole-rock F (114–596 ppm) but low Cl (3.3–54.8 ppm) contents. Apatite minerals separated from the high-silica rhyolites are classified as fluorapatite and show F-rich (F > 3.56 wt%), Cl-poor (Cl
更新日期：2020-10-01
京公网安备 11010802027423号