当前位置: X-MOL 学术J. South Am. Earth Sci. › 论文详情
Comments to “high-pressure eclogite facies metamorphism and decompression melting recorded in Paleoproterozoic accretionary wedge adjacent to probable ophiolite from Itaguara (southern São Francisco Craton - Brazil)”
Journal of South American Earth Sciences ( IF 1.655 ) Pub Date : 2020-01-02 , DOI: 10.1016/j.jsames.2019.102495
Hans-Joachim Massonne

The comments to the publication by de Oliviera Chaves et al. (2019) refer to the derivation of eclogite-facies conditions for micaschist from the Paleoproterozoic Itaguara Sequence in the southern São Francisco Craton in Brazil. These authors derived peak pressures of 18.5 kbar at 626 °C for this rock using phengite geobarometry. A scrutiny of their analytical data and the applied geothermobarometry led to the conclusion that these pressures were at most 13–14 kbar and possibly even below 10 kbar. Temperatures did not exceed about 600 °C. Thus, melting of the studied micaschist is unlikely. A subduction-related process in the Paleoproterozoic to form the Itaguara Sequence, as suggested by de Oliviera Chaves et al. (2019), must be called in question.
更新日期:2020-01-04

 

全部期刊列表>>
2020新春特辑
限时免费阅读临床医学内容
ACS材料视界
科学报告最新纳米科学与技术研究
清华大学化学系段昊泓
自然科研论文编辑服务
中国科学院大学楚甲祥
中国科学院微生物研究所潘国辉
中国科学院化学研究所
课题组网站
X-MOL
北京大学分子工程苏南研究院
华东师范大学分子机器及功能材料
中山大学化学工程与技术学院
试剂库存
天合科研
down
wechat
bug