RUDBAR, IRAN, JUNE 25 -- In the acres of broken bricks and glass littering Iran's stricken northwest, a sometimes tense detente has emerged between the country's Islamic government and hundreds of volunteers from Western countries and the Soviet Union.

People on both sides hope that the Western humanitarian assistance that has poured in here since Thursday's earthquake, in which an estimated 50,000 people died, will bolster moderates in Iran's hard-line, Shiite Moslem government who want to ease the country's international isolation.

But the interaction here between foreign volunteers, ordinary Iranians and officials and soldiers in Tehran's revolutionary government has revealed schisms and lingering resentments that suggest that no political miracle will emerge quickly as a result of the earthquake relief effort.

Some of the tension felt here by Iranian officials and Western rescue volunteers has arisen from the fruitlessness of their combined search for survivors trapped beneath collapsed homes and other buildings.

For three days, Iranian volunteers and foreign specialists have combed the rubble where thousands of victims may still lie buried. Two hundred French rescue workers with dogs and electronic gear have conducted wide searches, tapping on the debris and listening for answers from below. Teams from Great Britain, the Soviet Union, Belgium and the Netherlands have done the same.

"Our first mission is to find survivors," said Claude Sins, a French volunteer who has been searching the debris for three days. "We haven't found anyone. I'm not frustrated, no, but I'm unhappy."

Not a single person was found buried alive here or anywhere else in the northwest between Saturday and today, when the Associated Press reported that an Iranian Red Crescent team pulled a 1-year-old girl alive from the rubble of her home in Kelishom, a village 30 miles east of here. The Red Crescent is the Islamic equivalent of the Red Cross.

Other Western volunteers complained that strict controls imposed by Iranian soldiers have hampered their work.

Valerie Drouot, 26, a French doctor of emergency medicine, said that her volunteer organization, Medicins du Monde, had been asked today by military officials to leave Iran, although she added that she was not sure whether the order would be carried out. Drouot complained that soldiers coordinating much of the relief effort here had prevented her and other doctors from doing needed work.

"The Iranian people are kind, but the military people are very hard. They only want materials -- they don't want people," Drouot said. "They don't want Occidentals {Westerners} to see how the country is.

"I'm angry because when you go out in the villages, people say 'Please help,' . . .and we cannot. We sit here and do nothing."

Iranian relief officials and some other foreign volunteers said that cooperation between the Iranian government and Western rescue workers had been generally good. Some Iranian officials, however, reflecting the schism in Tehran's government over improving relations with the West, disagreed about whether the humanitarian assistance would help to open new contacts between Iran and its adversaries.

Mahmoud Mostafavi, a mullah, or religious leader, who traveled here from Tehran today to offer condolences to victims and inspect the damage, said Iranian religious leaders drew a distinction between humanitarian and political matters.

"From a humanitarian point of view, we accept their help and say thanks. But from a political point of view, we are against them," Mustafavi said. " . . . Only if they avoid their previous actions is there an opportunity to improve relations."

At least 62 aircraft carrying foreign aid from dozens of countries landed in Tehran today, Iran's official Islamic Republic News Agency reported. Sixty-eight planeloads arrived Sunday, Tehran radio said.

{Salman Rushdie, the British-based author forced into hiding by Iranian death threats, has pledged $8,650 to help Iranian earthquake victims, The Independent newspaper reported today in London, according to the Reuter news agency.

{Rushdie has been been in hiding since February 1989, when Iran's spiritual leader, Ayatollah Ruhollah Khomeini, decreed that Rushdie had blasphemed Islam in his book "The Satanic Verses" and pronounced a death sentence on him.}

While countries that have no diplomatic ties with Iran, such as the United States and Great Britain, have sent relief workers to the devastated northwest, no U.S. volunteers have yet arrived, according to Iranian officials. A chartered relief plane bearing food, clothes and other supplies from Americares, a Hartford-based private relief organization, arrived in Tehran Sunday night, but the plane flew out again after unloading its cargo of donations.

{In Washington, White House spokesman Marlin Fitzwater said the United States does not expect to reap any political benefits from earthquake aid sent to Iran, Reuter reported.

{"The U.S. government . . . has donated approximately $291,000 in relief supplies and transportation to the earthquake victims," Fitzwater told reporters. "This, in our judgment, is a humanitarian gesture. . . . We don't anticipate that it has any larger political consequences."}

Some Iranian religious leaders have continued to direct hostile rhetoric against the West, but other Iranian officials involved in the relief effort on the ground said their opinion of the West has been influenced favorably by the outpouring of assistance.

"The people are very satisfied with the foreigners who are very serious when they are working," said Gholar Rezaghoari, chief of police for Gilan province, the region hit hardest by the quake. "It will 100 percent affect relations with those countries."

The French and Soviet governments have sent the largest teams of volunteers into the northwest, and the French government has erected a large tri-color flag above its relief headquarters in nearby Manjil. The French cabinet minister for humanitarian assistance, Bernard Kouchner, arrived here to inspect the region today.

Kouchner said he hoped the international relief effort would lead to a new era of improved relations between Iran and the West. "What is important is that politics and diplomacy are now involved in the humanitarian sector," Kouchner said. He praised the Iranian government's relief effort as "apparently well-done."

Members of the Soviet relief team, primarily from Armenia, said they had come to Iran in part because of the assistance Armenia received after its devastating earthquake in December 1988.

"The Christians and the Moslems must help each other," said Rubin Simonian, a Soviet Armenian volunteer. "In Armenia 1 1/2 years ago, the whole world helped our people. We are here to do the same work."

Relief workers blame the dearth of survivors not only on the tremors that continue to rattle the region, but on the mud walls and flimsy construction of many of the houses that collapsed Thursday. In the absence of strong beams and frames that would remain intact even when walls crumble, there are few pockets beneath the rubble in which survivors might breathe, rescue workers said.

"It's very difficult to breathe because of the dirt here and the dust," said Movses Poghossian, a member of the Soviet Armenian team. "Many people suffocated."

For the first time, Iranian police and army officials today gave orders for bulldozers to plow passages through areas of ruins where specialists had searched thoroughly for survivors and found none.

{Tehran University's Geophysics Center reported that 22 aftershocks, some as strong as 5.5 on the Richter Scale, had occurred in the region in a 24-hour period, the Associated Press said.}