whole rock isochron 中文意思是什麼
whole rock isochron
解釋
全巖等時線-
The results of combined internal mineral separates and whole - rock sm - nd isochron age for gabbro dikes from : luobusha, angren and xiubugabu in yarlung zangpo ophilite zone are 177ma, 166ma and 173ma respectively. the 4lar - 39ar step heating spectra of rikangba ophiolite suggest that its formation age is also isoma. it indicates that there was a stronger regionally inagmatism during middle - early jurassic, and the time of i75ma was the main period of the magmatic event of yarlung zangpo ophilite
對鄔郁盆地嘎扎村組火山巖剖面的年代學研究表明,該區后碰撞期火山巖的~ ( 40 ) ar - ~ ( 39 ) ar年齡為12 ? 14ma ,侵入其中的花崗巖脈的~ ( 40 ) ar - ~ ( 39 ) ar年齡為10 . 84ma ,與岡底斯西段前人研究資料對比,認為岡底斯帶后碰撞火山巖時代有自西向東逐漸年輕的趨勢。 -
The internal mineral separates and whole - rock sm - nd isochron age for gabbro dikes from the dangqiong ophiolite is 373 ? 8ma, inferring a magmatic activity during late devonian, which end ( t ) = + 3. 3 suggests that its tectonic setting was probably oceanic island
其nd ( t ) = + 3 . 3 ,認為其時形成環境為洋島,可能代表了新特提斯蛇綠巖形成時所攜帶的古老洋殼。
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