High pressure phases in ophiolites - products of electrical discharges?
High pressure phases in ophiolites - products of electrical discharges?
批准号:
335612051
负责人:
Professor Dr. Christian Gerhard Ballhaus
金额:
$0.0万
依托单位国家:
德国
项目类别:
Research Grants
财政年份:
2017
资助国家:
德国
项目状态:
已结题
起止时间:
2016-12-31 至 2022-12-31
中文摘要
点击翻译按钮获取中文摘要
英文摘要
In recent times, high pressure minerals have been discovered in lithologies of ophiolite complexes. The high pressure phases noted include diamond, coesite, pseudomorphs of coesite after stishovite, and high pressure polymorphs of TiO2. They are intimately intergrown with highly reduced phases like moissanite SiC, Si-Fe alloys, metallic Ti, Ti carbides, and nitrides. Taken at face value, these unusual mineral assemblages have the potential to question well established models for the genesis and emplacement history of ophiolite complexes. It is proposed here that these assemblages neither reflect the tectonic history of the rocks nor their redox state. Novel experimental techniques will be employed to test if high pressure phases and highly reduced minerals can be stabilized locally by electric discharges. When a lightning bolt hits a rock, temperatures suffice to stabilize plasmas which, upon cooling, may precipitate compounds that are seemingly highly reduced but do not reflect reducing conditions during their formation. If lithologies do not disintegrate upon impact of a thunderbolt, thermal expansion can generate pressures sufficiently high that coesite, stishovite, and diamond may be stabilized. Positive results would have important implications: (1) high pressure phases do not necessarily reflect the tectonic history of the lithologies, and (2) nominally highly reduced phases like SiC or Si-Fe-Ti alloys may not monitor their redox histories.
期刊论文(0)
专著(0)
科研奖励(0)
会议论文
Physico-chemical and microbial processes governing the decay of organic substance in sediment under anoxic conditions
-
批准号:396708702
-
项目类别:Research Units
-
资助金额:$0.0万
-
财政年份:2018
-
负责人:Professor Dr. Christian Gerhard Ballhaus
-
依托单位:
Platinum enrichment processes in ultramafic massifs of the Uralian Platinum belt, Russia - evidence for mineralization at the magmatic to hydrothermal transition
-
批准号:325281966
-
项目类别:Research Grants
-
资助金额:$0.0万
-
财政年份:2017
-
负责人:Professor Dr. Christian Gerhard Ballhaus
-
依托单位:
The acidity of submarine hydrothermal solutions - an experimental study employing in-situ sampling techniques
-
批准号:314568258
-
项目类别:Research Grants
-
资助金额:$0.0万
-
财政年份:2016
-
负责人:Professor Dr. Christian Gerhard Ballhaus
-
依托单位:
Experimental simulation of atmosphere-seawater relations in the Archaean eon of Earth's history
-
批准号:240900066
-
项目类别:Research Grants
-
资助金额:$0.0万
-
财政年份:2013
-
负责人:Professor Dr. Christian Gerhard Ballhaus
-
依托单位:
Experimental silicification of wood
-
批准号:163884058
-
项目类别:Research Grants
-
资助金额:$0.0万
-
财政年份:2010
-
负责人:Professor Dr. Christian Gerhard Ballhaus
-
依托单位:
Speciation of palladium and ruthenium in S-bearing, sulfide-undersaturated basaltic melt - implications for enrichment mechanisms of noble metals in magmatic sulfide melt
-
批准号:139059925
-
项目类别:Research Grants
-
资助金额:$0.0万
-
财政年份:2009
-
负责人:Professor Dr. Christian Gerhard Ballhaus
-
依托单位:
Fraktionierung von Re und Os zwischen Monosulfid und Sulfidschmelze
-
批准号:5454588
-
项目类别:Research Grants
-
资助金额:$0.0万
-
财政年份:2005
-
负责人:Professor Dr. Christian Gerhard Ballhaus
-
依托单位:
Solidus von (Fe,Ni,Cu)1-xS Monosulfid im Erdmantel
-
批准号:5439885
-
项目类别:Research Grants
-
资助金额:$0.0万
-
财政年份:2004
-
负责人:Professor Dr. Christian Gerhard Ballhaus
-
依托单位:
Oxidationsgrad der Asthenosphäre
-
批准号:5410916
-
项目类别:Research Grants
-
资助金额:$0.0万
-
财政年份:2003
-
负责人:Professor Dr. Christian Gerhard Ballhaus
-
依托单位:
Geologie von Syros
-
批准号:5402863
-
项目类别:Research Grants
-
资助金额:$0.0万
-
财政年份:2003
-
负责人:Professor Dr. Christian Gerhard Ballhaus
-
依托单位:
The geochemical behavior of Pb and implications for terrestrial core formation scenarios
-
批准号:5335651
-
项目类别:Priority Programmes
-
资助金额:$0.0万
-
财政年份:2002
-
负责人:Professor Dr. Christian Gerhard Ballhaus
-
依托单位:
Die Defektstruktur von Olivin als SiO2-Aktivitätssensor im Erdmantel
-
批准号:5275722
-
项目类别:Research Grants
-
资助金额:$0.0万
-
财政年份:2000
-
负责人:Professor Dr. Christian Gerhard Ballhaus
-
依托单位:
Die Verteilung von Platingruppen-Elementen in konjugierten Sulfid-Silikat Systemen bei magmatischen Temperaturen
-
批准号:5216450
-
项目类别:Research Grants
-
资助金额:$0.0万
-
财政年份:1999
-
负责人:Professor Dr. Christian Gerhard Ballhaus
-
依托单位:
Anreicherung von Chromit in basaltischen Schmelzen
-
批准号:5127492
-
项目类别:Priority Programmes
-
资助金额:$0.0万
-
财政年份:1998
-
负责人:Professor Dr. Christian Gerhard Ballhaus
-
依托单位:
Magmatisch-sedimentäre Stratigraphie der Kykladeninsel Syros (Griechenland)
-
批准号:5256456
-
项目类别:Research Grants
-
资助金额:$0.0万
-
财政年份:1996
-
负责人:Professor Dr. Christian Gerhard Ballhaus
-
依托单位:
国内基金
海外基金
Zintl Phases点缺陷结构与热电性能调控
-
批准号:51771105
-
项目类别:面上项目
-
资助金额:60.0万元
-
批准年份:2017
-
负责人:夏盛清
-
依托单位: