The phrase "a massive bulk of" is correct and usable in written English.
It can be used to describe a large quantity or size of something, often in a physical or metaphorical sense.
Example: "The construction site was filled with a massive bulk of materials waiting to be used for the new building."
Alternatives: "a large amount of" or "a substantial volume of".
Official Labour party leaflets with details on how to sign up as a party member or registered supporter (membership is up 140,000 since the election) were handed out, showing how these packed rallies are potentially gifting Corbyn a massive bulk of voters in the leadership contest.
MRLC2 however was found highly expressed in a massive bulk of cells densely packed but highly disorganized, reminiscent of the mis-positioning characterized at the ultrastructural level (Fig. 3).
One thing the report does show, said Stepanovich, is that the NSA embarked on a massive bulk collection program to spy on a relatively small number of Americans.
"Not wittingly". By that point, of course, the NSA had quite wittingly been running a massive bulk telephone metadata collection program for years.
The advantage of the HPT process is that the end product is directly available as a massive bulk material.
"The idea that we use privately owned cars to shift the massive bulk of people around a city seems utterly absurd to me.
Made of sheet steel, it reduces the massive bulk of the classic armchair to a curvaceous shell of rounded forms.
If the pantomime allegories of his novel stagger and ultimately collapse, it's because their carnival-stilt legs can't support the massive bulk of the book.
In sculpture, the massive bulk of figures from the Han tradition gave way to leaner winged lions and other monumental work.
In spite of the massive bulk of the frontal callosal connections in man, ascertained consequences of their interruption are limited to disorders of motor control, with particular regard to bimanual coordination.
A lot of Chilean vines are grown at the limits of arable land, and up in the high ground, candelabra cactuses, avocado groves and granite cliffs jostle with the trim vineyards; at Errázuriz the massive bulk of Aconcagua, the world's highest mountain outside the Himalayas, is just round the corner.
