Collaborative Research: Petrotectonic Study of Ultrahigh-Pressure Rocks From the Kokchetav Massif, Northern Kazakhstan, and the Maksyutov Complex...

合作研究：哈萨克斯坦北部 Kokchetav 地块和 Maksutov 杂岩超高压岩石的岩石构造研究...

基本信息

批准号：
9725346
负责人：
Douglas Rumble
金额：
$ 2.8万
依托单位：
Carnegie Institution of Washington
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
1998
资助国家：
美国
起止时间：
1998-07-01 至 2000-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9725346&HistoricalAwards=false
关键词：
Collaborative Research Petrotectonic Study Ultrahigh

项目摘要

9725346 Rumble This proposed U.S.-Japan-Russia-Kazakhstan cooperative project will continue field, petrologic, stable, isotopic, geochronologic, and tectonic investigations of intracratonal ultrahigh-pressure and high-pressure metamorphic rocks in the Kokchetav Massif and the Maksyutov Complex, where coesite ( microdiamonds have been described. Primary objectives are to: (1) determine the regional distribution and structural relationships among diamond-bearing gneiss and marble, coesite-bearing eclogite and gneiss, and other UHP and HP rocks in the Kokchetav Massif and the Maksyutov Complex; (2) identify and characterize the mineral inclusions in garnet and zircon from eclogite, gneiss, marble, and schist to establish conditions of UHP metamorphism and the effect of such elevated pressures; (3) delineate mineral parageneses and P-T-t paths for eclogite, whiteschist, garnet peridotite, blueschist, gneiss and marble; (4) characterize 18O/16O ratios of silicates and carbon isotopes of diamond, magnesite, and other carbonates in order to evaluate the role of fluids at mantle depths; (5) determine the structural and geochemical characteristics of protoliths in order to infer their plate tectonic settings; (6) establish the ages of blueschist, eclogite, and retrograde metamorphism through U-Pb and 40Ar/39Ar dating; and (7) compare findings from central Asia with those from eastern China in order to elucidate the genetic relationships among recognized metamorphic, igneous, and tectonic features.

9725346隆隆声音，这项提议的美国 - 俄罗斯 - 哈萨克斯坦合作项目将继续现场，质学，稳定，同位素，同位素，年代学和构造研究，对众虫和高压力的Massif和Majtamorod的高压岩石岩石的主要对象（COPROCTIES）的主要对象（COPROPTIRE）曾经是Maperodiest（CoeSty of MageSitiate）（Co Copty of MageSitiate）（曾经是co）到：（1）确定含钻石的片麻岩和大理石之间的区域分布和结构关系，含有小甲虫的叶绿石和片麻岩，以及kokchetav massif和maksyutov综合体中的其他UHP和HP岩石（2）这种压力升高的影响；（5）确定原石的结构和地球化学特征，以推断其板块构造设置；（6）通过U-PB和40AR/39AR约会建立Blueschist，Eclogite和逆行变质的年龄；（7）将中亚的发现与中国东部的发现进行比较，以阐明公认的变质，火成岩和构造特征之间的遗传关系。