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Author Wen, Huaguo ♦ Zheng, Rongcai ♦ Geng, Wei ♦ Fan, Mingtao ♦ Wang, Manfu
Source SpringerLink
Content type Text
Publisher Higher Education Press
File Format PDF
Copyright Year ©2007
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Earth sciences ♦ Geology, hydrology & meteorology
Subject Keyword Jiuxi basin ♦ Lower Cretaceous ♦ exhalative rock ♦ rare earth element ♦ distribution pattern ♦ Ce anomaly ♦ Eu anomaly ♦ Geosciences
Abstract The exhalative rock occurring in the Xiagou Formation of Lower Cretaceous in Qingxi sag, Jiuxi basin is a sort of a rare lacustrine white smoke type, rich in ferrodolomites and albites. This paper introduces the geological background, mineral association, and lithology of the exhalative rock, and discusses its REE geochemical characteristics and connection with hydrothermal environment. It is shown that the exhalative rock has basal characteristics of hydrothermal depositional formation of LREE>HREE, with positive δCe and negative δEu, which is different from the characteristics of marine exhalative rock. Since the REE pattern and exceptional distribution of δEu and δCe are highly similar to the characteristics of alkalescent tholeiitic basalt in the same layer, the exhalative rock of Xiagou Formation is considered to be closely related to the origin of basalt in the same horizon. The fact that the amount of REE of exhalative rock decreases outwards indicates that exhalative rock in the Xiagou Formation may be connected with lacustrine hydrothermal convection circulation.
ISSN 16737385
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2007-01-01
Publisher Institution Chinese Universities
Publisher Place Beijing
e-ISSN 16737490
Journal Frontiers of Earth Science in China
Volume Number 1
Issue Number 3
Page Count 8
Starting Page 333
Ending Page 340


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Source: SpringerLink