Lu Lu

10 Questions 15 Answers 0 Followers

Questions related from Lu Lu

The effect of water on the occurrence of garnet during metamorphism or partial melting of mafic rock?

Everybody, As we all know, the prograde metamorphism of mafic rocks generally follows the common path from amphibolite through granulite to, finally, eclogite. Garnet is an important phase in...

14 June 2018 7,737 4 View

How great is the effect of crystal fractionation on SiO2 concentration in a single igneous intrusion (intermediate or felsic )?

Dear experts, Crystal fractionation is usually an important process that controls chemical composition evolution of magmatic rocks. I want to know how great is the effect of crystal fractionation...

18 June 2017 696 4 View

Whether these two granitoids are comagmatic products with different fractionation degrees?

I am studying two late Cretaceous K-rich granitoid intrusions, including a charnockite and a high-K calc-alkaline granite. These two intrusions are very near to each other in spatial distribution...

20 January 2017 1,800 6 View

Anyone can provide me a excel table or software for simulating the two-endmember mixing cure of igneous rocks ? Based on isotopes or trace elements.

I am studying a igneous pluton, which might have been generated by mixing of two different magma sources. Now, I want to simulate the two-endmember mixing cure of the igneous rocks, and estimate...

10 November 2016 1,657 4 View

Does partial melting of eclogites or garnet-bearing granulites necessarily produce adakites with high Sr/Y and (La/Yb)n ratios?

Everybody, I'm studying a Late Cretaceous (~68 Ma) opx-bearing granite in the Qiangtang Terrane, Tibetan Plateau. The two-pyroxene barametry indicates that the melt-formation of the this...

02 October 2016 7,453 4 View

Dose the mantle contain water? To what extent? Whether the partial melting of mantle need the involvement of water?

Dose the mantle contain water? To what extent? Whether the partial melting of mantle need the involvement of water? Thanks.

19 September 2016 6,164 3 View

What extent of influence dose the fractional crystallization has on the granite magma?

Fractional crystallization is an important process that controls magma evolution, especially for mafic magmas in arc-related settings. However, we know, the granitic magas have high viscosity,...

24 June 2016 7,103 3 View

Anyone give me a excel table for calculation of magma pressure based on pyroxene composition?

Anyone give me a excel table for calculation of magma pressure based on pyroxene composition? I have got models of Putirka from his personal website. Who can give other available models?

07 June 2016 6,449 1 View

Anyone can provide me a excel table for oxidation states of magmas by Ce(IV)/Ce(III) in zircon?

I want to calculate relative oxidation states of magmas by Ce(IV)/Ce(III)in zircon following the model of Ballard et al. (2002)(Contrib. Mineral Petrol.). However, it is troublesome...

06 June 2016 2,175 0 View

I want to ask whether the partial melting of basalts can generate potassic, intermediate melts?

I've been studying a charnockite (silica=60 to 70 wt.%) pluton in the Tibetan Plateau. This pluton is characterized by high Mg (magnesian), K (postassic), Ba and Sr contention. However, it has no...

07 May 2016 2,231 5 View