The TTG-Amphibolite Terrains of Arctic Fennoscandia: Infinite Networks of Amphibolite Metatexite-Diatexite Transitions
نویسندگان
چکیده
منابع مشابه
Characteristics of the Yates Unit Amphibolite
Introduction The lowest known portion of the Poorman Formation as determined from diamond drilling and mapping is the Yates Unit. It largely comprises amphibolite, but also contains interbedded volcaniclastics, calc-silicate beds, metachert, and carbonate-rich semipelitic rocks. This unit is exposed at the surface in the Blacktail Gulch area north of Lead and continues down-plunge to the southe...
متن کاملAn albite-anorthite assemblage in low-grade amphibolite facies rocks
Poikiloblastic amphibole schists from an ophiolite series in the vicinity of the Tertiary Bergell granite contain the assemblage albite (An 0)-anorthite (An 95), actinolite-pargasite, together with clinozoisite. TEM illustrates how large andesine crystals with a periodic APB (anti-phase boundaries) structure of e plagioclase change over a few hundred angstroms to pure albite and pure PT anorthi...
متن کاملNeutron activation analysis for the demonstration of amphibolite rock-weathering activity of a yeast.
Neutron activation analysis was employed in a survey of weathering abilities of rock surface microorganisms. A yeast isolated from an amphibolite of a megalithic grave was found actively to concentrate, in media and in or on cells, iron and other elements when grown in the presence of ground rock. This was demonstrated by comparing a spectrum of neutron-activated amphibolite powder (particle si...
متن کاملFollowing the Amphibolite to Greenschist Metamorphic Path through the Structural Parameters of Spinels from Amsaga (Mauritania)
We investigated the crystal and structural behavior of several Cr-bearing spinels from the Archean chromitites of Amsaga (Mauritania). The chemical and structural data testified a retrograde metamorphism from amphibolite to greenschist facies, witnessed by relative changes in the amount of all the major oxides (Cr, Al, Mg, Fe2+, Fe3+), the relative proportion of Fe/Fetot as well as the structur...
متن کاملAssessment of shock effects on amphibole water contents and hydrogen isotope compositions: 1. Amphibolite experiments
Kaersutitic amphiboles foundwithin a subset of theMartianmeteorites have lowwater contents and variably heavy hydrogen isotope compositions. In order to assess if impact shock-induced devolatilization and hydrogen isotope fractionation were determining factors in thesewater and isotopic characteristics of theMartian kaersutites, we conducted impact shock experiments on samples ofGoreMountain am...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Frontiers in Earth Science
سال: 2020
ISSN: 2296-6463
DOI: 10.3389/feart.2020.00252