Hello Samaita!
I assume you are from science background as you are aspiring to be a research associate. I will let you know that mathematics is a very important criterion for geosciences.
As you want to pursue research, first of all a BSc degree in either geology or complementary important subjects like Physics and mathematics is required. If you go for BS-MS integrated course in IISER Kolkata for Earth and environmental sciences , you will directly end up with a reserach fellowship for geoscience. Same happens if you take geology as a major subject in your BS degreee for Physics in IISc and MSc integrated Physics in NISER . These are the best institutes for research related activities so far.
Nevertheless, you can go for a BSc in geology followed by a MSc degree in top institutes like:-
Otherwise you can go for Post graduate courses like MSc or MTech or integrated Ph.D by clearing IIT JAM for geology in IITs like:-
The career opportunities in government sector will emerge in ONGC as a petroleum geologist, Coal India and at GSI(Geological survey of India). Lits of opportunities are there in private sector too.
You can read the article below to get full information in detail about colleges, scope, eligibilty, entrance exams, etc:-
https://www.careers360.com/courses/geology-course
All the best!
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