Damepaia S M Pdah

10 Questions 25 Answers 0 Followers

Questions related from Damepaia S M Pdah

How to differentiate the differences between a syenite and a fenite (practically)?

Fenite and syenite are present in the margins of my study area (ultramafic-alkaline-carbonatite complex). If fenitization takes place along fractures and are relatively thick, then how can I...

12 June 2022 4,522 2 View

Can someone please share or refer some field evidences of "Liquid Immiscibility" and "Crystal Fractionation" on the origin of "Carbonatites"?

I am finding lots of experimental papers on liquid immiscibility and crystal fractionation of carbonatites genesis. Also, I am getting papers showing evidence from fluid inclusion...

08 May 2021 4,518 0 View

How are carbonatites formed? Why are they always associated with alkaline rocks?

The Sung valley ultramafic alkaline carbonatite complex exposes a variety of carbonatite rocks in the form of plugs, dykes and veins. The variety range from apatite-rich, apatite-poor,...

30 March 2021 2,552 19 View

How does Digital Elevation Model maps works? For example: DEM DERIVED DRAINAGE SYSTEM, will it really signify that there is a water cycle?

How reliable and applicable is the DEM derived drainage system for a particular terrain. What could be the agents that causes the different drainage patterns besides water cycle?

04 September 2019 9,061 7 View

How can a metamorphosed igneous body be younger to a metasediment from field evidences?

If the metamorphosed igneous body is younger to the metasediments, then I would expect to observed the following points in the field:- 1. Presence of dykes, sills, tongues or apophyses within the...

06 August 2017 8,239 29 View

Why am I finding tuffaceous/ rhyolitic rocks always occurring/ associated on top of mafic rocks (doleritic)?

I am carrying out geological mapping of the Proterozoic basin which is suspected to be a rift basin. From my field observation, massive quartzites are emplaced by mafic and felsic magmatism, which...

06 February 2017 6,044 7 View

Country rocks of Proterozoic metapelites with magnetic minerals & andalusite (?), occurring at margin of Sung Ultramafic Alkaline Carbonatite Complex?

Can anyone explain me what could had happened according to my above points.

28 January 2017 9,945 4 View

What are the best and cheapest way of carrying out a Geological Mapping?

I have attached a table showing the simplified integrated geological fieldwork techniques which I had prepared after undergoing some training. Kindly suggest, correct or comment, so that I can...

12 July 2016 3,036 15 View

What are the major differences between kimberlite, lamprophyre and lamproite?

I am asking in general.

18 August 2015 8,389 12 View

What is metasomatism? How to differentiate an igneous and metamorphic metasomatism?

I understand metasomatism as follows:- 1. It is a geological process which involves the transfer of fluid energy and materials to a new rock system. 2. It always involves contribution of new...

01 January 1970 874 12 View