Evidence of Mesozoic multiple hydrothermal activity in the basement at Nonnenmattweiher (southern Schwarzwald), Germany

• Published in: Mineralium deposita Vol. 32; no. 2; pp. 197 - 200
• Main Authors: Wernicke, R. S., Lippolt, H. J.
• Format: Journal Article
• Language: English
• Published: Heidelberg Springer Nature B.V 01.02.1997
• Subjects: Geological time; Geology; Mineralogy

Two botryoidal hematites from the qtz-fl-hem veins at the Nonnenmattweiher cirque (zone of Badenweiler-Lenzkirch, Südschwarzwald) were dated using the (U+Th)-He method. One hematite gives an Early Triassic age (234±5 Ma) and the second straddles the Cretaceous/Jurassic time boundary (126±4 Ma). The...