IDSSE OpenIR  > 深海科学研究部  > 深海地质与地球化学研究室
Mineralogical, crystallographic, and isotopic constraints on the precipitation of aragonite and calcite at Shigiang and other hot springs in Yunnan Province, China
Jones, Brian1; Peng, Xiaotong2
2016-11-01
Source PublicationSEDIMENTARY GEOLOGY
Volume345Pages:103-125
AbstractTwo active spring vent pools at Shiqiang (Yunnan Province, China) are characterized by a complex array of precipitates that coat the wall around the pool and the narrow ledges that surround the vent pool. These precipitates include arrays of aragonite crystals, calcite cone-dendrites, red spar calcite, unattached dodecahedral and rhombohedral calcite crystals, and late stage calcite that commonly coats and disguises the earlier formed precipitates. Some of the microbial mats that grow on the ledges around the pools have been partly mineralized by microspheres that are formed of Si and minor amounts of Fe. The calcite and aragonite that are interspersed with each other at all scales are both primary precipitates. Some laminae, for example, change laterally from aragonite to calcite over distances of only a few millimetres. The precipitates at Shiqiang are similar to precipitates found in and around the vent pools of other springs found in Yunnan Province, including those at Gongxiaoshe, Zhuyuan, Eryuan, and Jifei. In all cases, the delta D-water and delta(18)O(wate)r indicate that the spring water is of meteoric origin. These are thermogene springs with the carrier CO2 being derived largely from the mantle and reaction of the waters with bedrock. Variations in the delta C-13(travertine) values indicate that the waters in these springs were mixed, to varying degrees, with cold groundwater and its soil-derived CO2. Calcite and aragonite precipitation took place once the spring waters had become supersaturated with respect to CaCO3, probably as a result of rapid CO2 degassing. These precipitates, which were not in isotopic equilibrium with the spring water, are characterized by their unusual crystal morphologies. The precipitation of calcite and aragonite, seemingly together, can probably be attributed to microscale variations in the saturation levels that are, in turn, attributable to microscale variations in the rate of CO2 degassing. (C) 2016 Elsevier B.V. All rights reserved.
SubtypeArticle
KeywordHot Springs Calcite Aragonite Opal-a Isotopes Dendrites
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.sedgeo.2016.09.007
Indexed BySCI
Language英语
WOS KeywordREHAI GEOTHERMAL-FIELD ; BRITISH-WEST-INDIES ; KENYA RIFT-VALLEY ; SOUTHWESTERN CHINA ; LAKE BOGORIA ; DEPOSITIONAL FACIES ; GRAND CAYMAN ; NEW-ZEALAND ; FRACTIONATION ; OXYGEN
WOS SubjectGeology
WOS IDWOS:000388152700007
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.idsse.ac.cn/handle/183446/1659
Collection深海科学研究部_深海地质与地球化学研究室
Affiliation1.Univ Alberta, Dept Earth & Atmospher Sci, Edmonton, AB T6G 2E3, Canada
2.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China
Recommended Citation
GB/T 7714
Jones, Brian,Peng, Xiaotong. Mineralogical, crystallographic, and isotopic constraints on the precipitation of aragonite and calcite at Shigiang and other hot springs in Yunnan Province, China[J]. SEDIMENTARY GEOLOGY,2016,345:103-125.
APA Jones, Brian,&Peng, Xiaotong.(2016).Mineralogical, crystallographic, and isotopic constraints on the precipitation of aragonite and calcite at Shigiang and other hot springs in Yunnan Province, China.SEDIMENTARY GEOLOGY,345,103-125.
MLA Jones, Brian,et al."Mineralogical, crystallographic, and isotopic constraints on the precipitation of aragonite and calcite at Shigiang and other hot springs in Yunnan Province, China".SEDIMENTARY GEOLOGY 345(2016):103-125.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Jones, Brian]'s Articles
[Peng, Xiaotong]'s Articles
Baidu academic
Similar articles in Baidu academic
[Jones, Brian]'s Articles
[Peng, Xiaotong]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Jones, Brian]'s Articles
[Peng, Xiaotong]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.